Download or read book HVAC Retrofitting written by Charles Nehme and published by Charles Nehme. This book was released on with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Embarking on Your Energy-Efficient Journey The built environment plays a significant role in shaping our world, impacting not only our comfort and productivity but also the delicate balance of our planet. HVAC systems, responsible for heating, cooling, and ventilation, form the backbone of this environment, yet many existing systems operate with outdated technology and inefficient practices, contributing significantly to energy consumption and greenhouse gas emissions. This book, "Energy-Efficient HVAC Retrofitting: Upgrading Existing Systems," serves as your guide to navigating the world of retrofitting. Whether you're a building owner seeking to minimize your environmental footprint, a facility manager concerned about operational costs, or an engineer eager to implement sustainable solutions, this book empowers you with the knowledge and tools to embark on your energy-efficient journey. Within these pages, you'll gain a comprehensive understanding of the global energy landscape and the critical need for retrofitting existing HVAC systems. We'll delve into the fundamentals of how these systems work and equip you with the ability to assess your own system's strengths and weaknesses. You'll explore a wide range of retrofit options, from upgrading equipment to implementing smart controls and building automation systems. We'll delve into the world of envelope improvements, showcasing strategies for sealing leaks and optimizing thermal performance. However, upgrading your HVAC system goes beyond technology. We'll guide you through the planning, implementation, and financing stages, ensuring a smooth and successful project. You'll discover real-world case studies that showcase the impact of successful retrofits across diverse building types. Finally, we'll peer into the future, exploring emerging technologies and trends that will shape the evolution of HVAC systems. We'll leave you with a renewed sense of purpose, empowered to contribute to a more sustainable future by investing in the efficient operation of our built environment. This book is more than just a technical guide; it's a call to action. We invite you to join us on this journey towards a greener tomorrow, one upgraded HVAC system at a time.

Download or read book HVAC Retrofitting written by Charles Nehme and published by Independently Published. This book was released on 2024-02-03 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Embarking on Your Energy-Efficient Journey The built environment plays a significant role in shaping our world, impacting not only our comfort and productivity but also the delicate balance of our planet. HVAC systems, responsible for heating, cooling, and ventilation, form the backbone of this environment, yet many existing systems operate with outdated technology and inefficient practices, contributing significantly to energy consumption and greenhouse gas emissions. This book, "Energy-Efficient HVAC Retrofitting: Upgrading Existing Systems," serves as your guide to navigating the world of retrofitting. Whether you're a building owner seeking to minimize your environmental footprint, a facility manager concerned about operational costs, or an engineer eager to implement sustainable solutions, this book empowers you with the knowledge and tools to embark on your energy-efficient journey. Within these pages, you'll gain a comprehensive understanding of the global energy landscape and the critical need for retrofitting existing HVAC systems. We'll delve into the fundamentals of how these systems work and equip you with the ability to assess your own system's strengths and weaknesses. You'll explore a wide range of retrofit options, from upgrading equipment to implementing smart controls and building automation systems. We'll delve into the world of envelope improvements, showcasing strategies for sealing leaks and optimizing thermal performance. However, upgrading your HVAC system goes beyond technology. We'll guide you through the planning, implementation, and financing stages, ensuring a smooth and successful project. You'll discover real-world case studies that showcase the impact of successful retrofits across diverse building types. Finally, we'll peer into the future, exploring emerging technologies and trends that will shape the evolution of HVAC systems. We'll leave you with a renewed sense of purpose, empowered to contribute to a more sustainable future by investing in the efficient operation of our built environment. This book is more than just a technical guide; it's a call to action. We invite you to join us on this journey towards a greener tomorrow, one upgraded HVAC system at a time.

Download or read book HVAC Retrofits written by Herbert Wendes and published by The Fairmont Press, Inc.. This book was released on 1994 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering the entire process of retrofitting HVAC systems to achieve energy savings, this straightforward guide takes you step by step from the initial walk-through audit through the monitoring of results after the retrofit project is complete. You'll learn how to estimate labor and material costs for all types of HVAC equipment and systems. You'll find out how to convert constant volume systems to variable air volume, along with how to calculate the costs of doing so. Methods for calculating, analyzing and projecting energy consumption in terms of BTU and KW as well as in cost terms are detailed. Sample energy retrofit estimates are included, along with many time-saving reference lists.

Download or read book Retrofitting for Energy Conservation written by William H. Clark (II) and published by McGraw-Hill Professional Publishing. This book was released on 1997 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Convert residences and light-commercial buildings from energy-wasters to energy-efficiency. New remodelling codes require improvements in energy efficiency. Home and building owners want to reduce their energy costs. And now with Retrofitting for Energy Conservation, construction and design professionals can discover the most up-to-date plans, methods, tools, and materials for improving energy conservation in existing structures. Almost 85% of energy-conserving projects are retrofits, according to the National Association of Homebuilders. Retrofitting for Energy Conservation gives you the tools you need to meet this demand with step-by-step help in retrofitting any residence or light commercial building for energy savings. From assessing the challenge and offering the client options through initial project design and final execution of the building plan, this book gives you solutions that meet and exceed code requirements.

Download or read book A Systems Approach to Retrofitting Residential HVAC Systems written by and published by . This book was released on 2004 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Best Practices Guide for retrofitting residential HVAC systems has recently been completed by DOE. The guide uses diagnostics and checklists to guide the user to specific retrofit packages that maximize retrofit energy savings, comfort and safety potential. The guide uses a systems approach to retrofitting where the interaction of different building components is considered throughout the retrofit selection process. For example, added building envelope insulation reduces building loads so that smaller capacity HVAC systems can be used. In this study, several houses were surveyed using the Best Practices Guide and a single house was selected for retrofitting. The objectives were to demonstrate how a successful system-wide retrofit can be carried out and to provide feedback to improve the guide. Because it represents a departure from current practice, a key aspect of this study was to investigate the interactions with contractors and code officials who are unfamiliar with the systems approach. The study found that the major barrier to the systems approach in retrofits was in changing the working practices of contractors and code officials.

Download or read book COVID HVAC Retrofits Facilities Guidelines written by Charles Nehme and published by Charles Nehme. This book was released on with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preface HVAC stands for (Heating, Ventilation & Air Conditioning) I write short books "simple yet concise" This book is written to help interested individuals learn about Covid and Facilities. Covid has struck the world by surprise and we are still learning about it. This is the first Version, as you would expect from something Novel. Acknowledgment This book is dedicated to all the People who are battling Covid-19 (Coronavirus) Healthcare workers, Delivery People and unfortunately to all the ones who have lost the battle against this Ugly disease, whether leaked from a Lab or made the jump from animals on to humans. I believe we will never determine exactly how it started. Unfortunately due to all the political prevention of finding the truth as in all major cases that struck humanity before.

Download or read book Retrofitting for Energy Conservation written by William H. Clark (II) and published by McGraw Hill Professional. This book was released on 1997 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Convert residences and light-commercial buildings from energy-wasters to energy-efficiency. New remodelling codes require improvements in energy efficiency. Home and building owners want to reduce their energy costs. And now with Retrofitting for Energy Conservation, construction and design professionals can discover the most up-to-date plans, methods, tools, and materials for improving energy conservation in existing structures. Almost 85% of energy-conserving projects are retrofits, according to the National Association of Homebuilders. Retrofitting for Energy Conservation gives you the tools you need to meet this demand with step-by-step help in retrofitting any residence or light commercial building for energy savings. From assessing the challenge and offering the client options through initial project design and final execution of the building plan, this book gives you solutions that meet and exceed code requirements.

Download or read book Case Study Field Evaluation of a Systems Approach to Retrofitting a Residential HVAC System written by and published by . This book was released on 2003 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: This case study focusing on a residence in northern California was undertaken as a demonstration of the potential of a systems approach to HVAC retrofits. The systems approach means that other retrofits that can affect the HVAC system are also considered. For example, added building envelope insulation reduces building loads so that smaller capacity HVAC system can be used. Secondly, we wanted to examine the practical issues and interactions with contractors and code officials required to accomplish the systems approach because it represents a departure from current practice. We identified problems in the processes of communication and installation of the retrofit that led to compromises in the final energy efficiency of the HVAC system. These issues must be overcome in order for HVAC retrofits to deliver the increased performance that they promise. The experience gained in this case study was used to optimize best practices guidelines for contractors (Walker 2003) that include building diagnostics and checklists as tools to assist in ensuring the energy efficiency of ''house as a system'' HVAC retrofits. The best practices guidelines proved to be an excellent tool for evaluating the eight existing homes in this study, and we received positive feedback from many potential users who reviewed and used them. In addition, we were able to substantially improve the energy efficiency of the retrofitted case study house by adding envelope insulation, a more efficient furnace and air conditioner, an economizer and by reducing duct leakage.

Download or read book Best Practices Guide for Residential HVAC Retrofits written by Iain S. Walker and published by . This book was released on 2003 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: This best practices guide for residential HVAC system retrofits is aimed at contractors who want guidance on delivering energy efficient, cost effective and innovative products. It has been developed around the idea of having packages of changes to the building HVAC system and building envelope that are climate and house construction dependent. These packages include materials, procedures and equipment and are designed to remove some of the guesswork from a builder, contractor, installer or homeowner decisions about how best to carry out HVAC changes. The packages are not meant to be taken as rigid requirements--instead they are systems engineered guidelines that form the basis for energy efficient retrofits. Similar approaches have been taken previously for new construction to develop extremely energy efficient homes that are comfortable safe and durable, and often cost less than standard construction. This is best epitomized by the Building America program whose partners have built thousands of residences throughout the U.S. using these principles. The differences between retrofitting and new construction tend to limit the changes one can make to a building, so these packages rely on relatively simple and non-intrusive technologies and techniques. The retrofits also focus on changes to a building that will give many years of service to the occupants. Another key aspect of these best practices is that we need to know how a house is working so that we know what parts have the potential for improvement. To do this we have put together a set of diagnostic tools that combine physical measurements and checklists/questionnaires. The measured test results, observations and homeowner answers to questions are used to direct us towards the best retrofits applicable to each individual house. The retrofits will depend on the current condition of the building envelope and HVAC system, the local climate, the construction methods used for the house, and the presence of various energy saving systems (e.g., a Heat Recovery Ventilator) and/or materials. This is just like a doctor referring a patient for blood tests or x-rays before actually performing surgery. This way the doctor can be sure that he does the right thing. To take this analogy further--we can borrow from the medical profession and say that the first thought when retrofitting a house is to do no harm, i.e., do not make changes that could make the house worse to live in.

Download or read book How to select the proper HVAC equipment to suit your project written by Charles Nehme and published by Charles Nehme. This book was released on with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preface Selecting the proper HVAC (Heating, Ventilation, and Air Conditioning) equipment for your project is crucial for ensuring energy efficiency, comfort, and cost-effectiveness. This preface will provide an overview of key considerations and steps involved in choosing the right HVAC system for your specific needs. Understanding HVAC Systems HVAC systems are integral to maintaining indoor air quality and thermal comfort. They include components for heating, cooling, ventilation, and humidity control. Common types of HVAC systems include: Split Systems: Separate indoor and outdoor units, ideal for individual room control. Packaged Systems: All-in-one units, typically used in commercial applications. Heat Pumps: Efficient for both heating and cooling, suitable for moderate climates. Ductless Mini-Splits: Offer flexibility without ductwork, ideal for retrofits or specific zones. Key Considerations Project Scope and Requirements: Size and Layout: The size and layout of the space influence the type and capacity of the HVAC system needed. Larger or multi-story buildings may require more complex systems. Usage: Determine the primary use of the space (e.g., residential, commercial, industrial) and any specific needs such as server rooms, labs, or manufacturing areas. Climate: Local climate conditions significantly affect HVAC requirements. Hot and humid climates demand efficient cooling and dehumidification, while colder regions prioritize heating. Energy Efficiency: Look for systems with high Seasonal Energy Efficiency Ratio (SEER) and Heating Seasonal Performance Factor (HSPF) ratings. Energy-efficient systems reduce operating costs and environmental impact. Consider systems with variable speed technology for better energy management. Budget: Balance initial investment with long-term operational costs. High-efficiency systems may have higher upfront costs but lower ongoing expenses. Building Codes and Regulations: Ensure compliance with local building codes, standards, and regulations. This includes safety standards, energy efficiency mandates, and environmental regulations. Indoor Air Quality: Choose systems with good filtration and ventilation capabilities to maintain healthy indoor air quality, especially in spaces with high occupancy or specific air quality requirements. System Design and Integration: Proper design and integration with existing building systems (electrical, plumbing, etc.) are crucial for optimal performance. Consider consulting with HVAC professionals or engineers. Future Scalability: Plan for potential future expansions or modifications. Select systems that can be easily upgraded or expanded. Steps to Select the Proper HVAC Equipment Assess the Building Load: Conduct a load calculation to determine heating and cooling requirements. This includes considering insulation, windows, occupancy, and internal heat gains. Evaluate Different HVAC Systems: Compare various systems based on efficiency, capacity, and suitability for the project's specific needs. Consider Technological Features: Look for modern features such as smart thermostats, zoning capabilities, and remote monitoring for enhanced control and efficiency. Consult with Professionals: Engage HVAC contractors, engineers, or consultants to review your plans and provide expert recommendations. Review Manufacturer Warranties and Support: Choose reputable manufacturers that offer robust warranties and reliable customer support. Conclusion Selecting the proper HVAC equipment is a multifaceted process that requires careful consideration of the project's specific requirements, climate, energy efficiency, and budget. By following a systematic approach and leveraging professional expertise, you can ensure that your HVAC system will provide optimal performance, comfort, and cost-efficiency for your project.

Download or read book Sustainable Retrofitting of Commercial Buildings written by Richard Hyde and published by Routledge. This book was released on 2015-01-28 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite recent improvements in energy efficiency being made in new build, it is important that the existing commercial building sector also take action to meet emission reduction targets. The objectives and challenges of such action will reduce the risk of the sector becoming obsolete due to high energy use and poor environmental performance. This book presents a theory-based, practice-support methodology to deal with sustainable retrofitting opportunities for existing commercial buildings in warm climates using bioclimatic design as the basis. The book has four main parts, focusing on eco-design and renovation, bioclimatic retrofitting, technological and behavioural change and case studies of retrofitting exemplars. In the first part, the context of climate change effects on design and renovation at the city scale is discussed. The second part looks at bioclimatic retrofitting as a 'design guide' for existing buildings, highlighting the significance of architectural design and engineering systems for energy performance. The technological and behavioural contexts of the existing building sector – policies, modelling, monitoring and trend analysis in respect to energy and environmental performance – are covered in part three. The final part gives some case studies showing the effectiveness of strategies suggested for effective environmental performance. This book is a must-have guide for all involved in the design and engineering of retrofitting projects in warm climates.

Download or read book Retrofitting of Commercial Institutional and Industrial Buildings for Energy Conservation written by Milton Meckler and published by Van Nostrand Reinhold Company. This book was released on 1984 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Home Energy Article written by Iain S. Walker and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past couple of years, a Best Practices Guideline for Residential HVAC Retrofits has been developed by the US Department of Energy (DOE) to provide guidance for contractors in performing whole house retrofits. Because of the strongly cost-limited nature of retrofits, combined with the wide range of existing home performance, the DOE guideline has several levels of retrofit packages depending on the level of intervention that a homeowner can afford, or is justified by the condition of the home and its HVAC system. The packages are pre-selected combinations of individual retrofit activities that provide simple whole house guidance for contractors. This guideline has been evaluated by potential users such as contractors and weatherization experts. Part of this evaluation included a field pilot study applying the guidelines to eight test houses. The application of the guidelines to these houses resulted in feedback that helped to update and improve the guidelines. In order to have an independent assessment of the guidelines, two of the houses were evaluated by an independent energy efficiency contractor. One of the test houses was chosen to be retrofitted and had the Best Practices Guideline diagnostic screening tests repeated after the retrofit to compare pre- and post-retrofit performance, as well as being the subject of extensive monitoring to determine the change in house performance due to the retrofit. More details of these test results and the application and development of the Retrofit Guide can be found in Walker [2003].

Download or read book Deep Energy Retrofit Guide for Public Buildings written by Rüdiger Lohse and published by Springer. This book was released on 2019-04-10 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides detailed information on how to set up Deep Energy Retrofits (DERs) in public buildings, and shares in-depth insights into the current status of the major technologies, strategies and practical best practice examples of how to cost-effectively combine them. Case studies from Europe are analyzed with respect to energy use before and after renovation, reasons for undertaking the renovation, co-benefits achieved, resulting cost-effectiveness, and the business models employed. The building sector holds the potential for tremendous improvements in terms of energy efficiency and reducing carbon emissions, and energy retrofits to the existing building stock represent a significant opportunity in the transition to a low-carbon future. Moreover, investing in highly efficient building materials and systems can replace long-term energy imports, contribute to cost cutting, and create a wealth of new jobs. Yet, while the technologies needed in order to improve energy efficiency are readily available, significant progress has not yet been made, and “best practices” for implementing building technologies and renewable energy sources are still relegated to small “niche” applications. Offering essential information on Deep Energy Retrofits, the book offers a valuable asset for architects, public authorities, project developers, and engineers alike.

Download or read book Engineering Asset Management Systems Professional Practices and Certification written by Peter W. Tse and published by Springer. This book was released on 2014-12-09 with total page 1758 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceeding represents state-of-the-art trends and developments in the emerging field of engineering asset management as presented at the Eight World Congress on Engineering Asset Management (WCEAM). The Proceedings of the WCEAM 2013 is an excellent reference for practitioners, researchers and students in the multidisciplinary field of asset management, covering topics such as: Asset condition monitoring and intelligent maintenance, 2. Asset data warehousing, data mining and fusion, 3. Asset performance and level-of-service models, 4. Design and life-cycle integrity of physical assets, 5. Deterioration and preservation models for assets, 6. Education and training in asset management, 7. Engineering standards in asset management, 8. Fault diagnosis and prognostics, 9. Financial analysis methods for physical assets, 10. Human dimensions in integrated asset management, 11. Information quality management, 12. Information systems and knowledge management, 13. Intelligent sensors and devices, 14. Maintenance strategies in asset management, 15. Optimisation decisions in asset management, 16. Risk management in asset management, 17. Strategic asset management, 18. Sustainability in asset management. King WONG served as Congress Chair for WCEAM 2013 and ICUMAS 2013 is the President of the Hong Kong Institute of Utility Specialists (HKIUS) and Convener of International Institute of Utility Specialists (IIUS). Peter TSE is the Director of the Smart Engineering Asset Management laboratory (SEAM) at the City University of Hong Kong and served as the Chair of WCEAM 2013 Organising Committee. Joseph MATHEW served as the Co-Chair of WCEAM 2013 is also WCEAM’s General Chair. He is the Chief Executive Officer of Asset Institute, Australia.

Download or read book Sustainable Retrofitting of Commercial Buildings written by Simon Burton and published by Routledge. This book was released on 2014-10-03 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: Whilst sustainability is already an important driver in the new building sector, this book explores how those involved in refurbishment of commercial building are moving this agenda forward. It includes chapters by developers, surveyors, cost consultants, architects, building physicists and other players, on the role they each can play in enabling refurbishment to be commercially, environmentally and socially sustainable. Case studies from northern climates show real examples of different building types, ages and uses and will demonstrate what action has been taken to create more sustainable buildings. The chapters raise and discuss all the relevant issues that need to be considered in retrofitting decision making. Changing standards, planning, process management, financing, technical issues, site organisation, commissioning and subsequent building management are all considered. The book demonstrates that buildings can be made comfortable to occupy, easy to manage and low in energy demand and environmental impact.

Download or read book HVAC Installations Best Practices written by Charles Nehme and published by Charles Nehme. This book was released on with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction The purpose of this guide is to provide a comprehensive set of best practices for HVAC (Heating, Ventilation, and Air Conditioning) installations. These practices are designed to ensure optimal system performance, energy efficiency, safety, and customer satisfaction. Whether you are an HVAC contractor, installer, or technician, adhering to these guidelines will help you deliver high-quality installations that meet or exceed industry standards. Planning and Design Load Calculation: Perform accurate load calculations using recognized methods such as Manual J for residential and Manual N for commercial buildings to ensure the system is appropriately sized. System Selection: Choose HVAC systems that match the load requirements and consider factors such as energy efficiency ratings (SEER, EER, HSPF), environmental impact (refrigerant type), and client preferences. Ductwork Design: Design ductwork to minimize pressure losses and ensure balanced airflow. Use Manual D for residential duct design and ensure proper sizing and layout to prevent issues like hot and cold spots. Installation Best Practices Site Preparation: Ensure the installation site is clean, accessible, and complies with local building codes. Verify that there is sufficient space for equipment and maintenance access. Proper Mounting and Leveling: Mount and level all HVAC equipment correctly to prevent operational issues and enhance longevity. Use appropriate mounting hardware and check levels using a spirit level. Refrigerant Piping: Size and install refrigerant piping according to manufacturer specifications to prevent pressure drops and ensure efficient refrigerant flow. Insulate refrigerant lines to prevent heat loss or gain. Electrical Connections: Ensure all electrical connections are secure and comply with the National Electrical Code (NEC). Verify correct voltage and amperage, and install appropriate circuit protection devices. Duct Sealing and Insulation: Seal all duct joints with mastic or UL 181-rated tape to prevent air leakage. Insulate ducts in unconditioned spaces to improve energy efficiency. Ventilation Requirements: Install ventilation systems according to local codes and standards such as ASHRAE 62.2 for residential ventilation. Ensure proper placement of intake and exhaust vents to optimize air quality and system performance. Commissioning and Testing System Startup: Follow manufacturer guidelines for system startup procedures. Verify that all components are functioning correctly and that there are no abnormal noises or vibrations. Airflow Measurement: Measure and adjust airflow to meet design specifications. Use tools like anemometers or balometers to ensure balanced and adequate airflow throughout the system. Refrigerant Charge Verification: Verify that the refrigerant charge is correct using superheat and subcooling methods. Adjust the charge if necessary to ensure optimal system performance and efficiency. Maintenance and Documentation Maintenance Plan: Develop a maintenance plan that includes regular inspections, filter changes, and system tune-ups. Educate the customer on the importance of routine maintenance to prolong the system’s lifespan and maintain efficiency. Customer Education: Provide the customer with a detailed user manual and a walkthrough of the system’s features and maintenance requirements. Ensure they understand how to operate the thermostat, change filters, and recognize signs of potential issues. Documentation: Keep detailed records of all installation steps, system specifications, and any modifications made during the process. This documentation will be invaluable for future maintenance and troubleshooting. Safety and Compliance Code Compliance: Ensure that all installations comply with local building codes, safety regulations, and manufacturer guidelines. This includes securing necessary permits and passing all required inspections. Safety Protocols: Follow all safety protocols during installation, such as using appropriate personal protective equipment (PPE), ensuring proper ventilation when working with refrigerants, and maintaining a clean and hazard-free work area. Environmental Considerations: Dispose of old equipment and refrigerants responsibly, following EPA guidelines and local regulations. Consider recommending environmentally friendly options to customers, such as high-efficiency systems and eco-friendly refrigerants. Quality Assurance Final Inspection: Conduct a thorough final inspection of the entire HVAC system, checking for correct installation, proper operation, and compliance with all specifications. Customer Satisfaction: Ensure the customer is satisfied with the installation. Address any concerns or questions they may have before concluding the job. Warranty and Support: Provide information on warranties and support services. Ensure the customer knows who to contact in case of any future issues or questions. By adhering to these best practices, HVAC professionals can ensure high-quality installations that provide reliable, efficient, and safe heating and cooling solutions for their customers.