Since 2000, Oakleaf Commercial Services has been providing high quality, professional, property maintenance and construction services. They also offer a wealth of services including responsive repairs, building construction, modernizations and adaptions, grounds maintenance, fleet services, a PVC-u manufacturing facility and a bespoke joinery workshop.

OEI is a second generation, family-owned and operated business offering air conditioning and heating services to home or business. Rely on their certified technicians for advice, sales, repairs, and installations.

Ofgem is Britain’s independent energy regulator. Their role is to protect consumers now and in the future by working to deliver a greener, fairer energy system. They are a non-ministerial government department and an independent National Regulatory Authority.

Oklahoma Chiller Corporation is a commercial and industrial HVAC company with offices in Tulsa and Oklahoma City. In addition to mechanical and HVAC services, Oklahoma Chiller offers building automation services and equipment rental services.

OMNIA Partners, Public Sector is the cooperative purchasing organization that is driving excellence in public sector procurement for K–12 schools and districts, state and local governments, colleges and universities and nonprofits. OMNIA Partners offers the most robust portfolio of high-quality cooperative contracts in the public procurement space.

One Hour Heating & Air Conditioning® of Lee's Summit is the most trusted source of HVAC services in the Lee’s Summit area. Their team of Lee's Summit heating and cooling technicians are highly trained and licensed, so that they can provide the best Lee’s Summit HVAC repairs, installation, and maintenance possible.

OpenTherm is a non-manufacturer-dependent system of communication between modulating HVAC appliances and room thermostats. It consists of a communication protocol and an interface specification. The OpenTherm communication protocol is primarily designed to control modulating heating appliances. The protocol is available to members of the OpenTherm Association only.

Optimum Energy’s patented software and engineering expertise has helped customers reduce energy use in heating and cooling systems, the largest consumer of energy in buildings, by up to 50%. Their solutions combine technologically advanced HVAC optimization software with powerful cloud-based data analytics and world-class engineering support.

Family owned by Dave and Kathy Ignasiak, Orchard Hill Mechanical offers 25+ years of experience as a full featured residential, commercial, agricultural, and industrial mechanical contractor.

The history of the ORION dry pump started in Japan with the oil-free rotary vane vacuum pump. Thanks to its reduced noise and longer life, the dry pump has been indispensable in automation and labor-saving applications, playing an active and wide-ranging role for every kind of industry

Oxygen8 is changing the way buildings provide healthy, comfortable and energy efficient spaces for occupants. They provide 100% fresh, filtered air and smart technology for maximum comfort and value.

Paschal Heat, Air & Geothermal, the team of trained and certified HVAC technicians in Northwest provides timely, friendly support, and they guarantee 100% satisfaction from start to completion.

PassiveLogic is disrupting the world of automation with the first fully autonomous platform for buildings. They reinvented automation to replace legacy control logic with real-time control decisions at the edge, reducing the world's carbon footprint, while paving the way for smart cities.

Perceptyx is the most comprehensive listening solution available to illuminate the employee experience and see the whole organization thrive.

Perdue Heating & Cooling was established in 1982. It is a renowned HVAC services company, dedicated to 100% customer satisfaction. They service all makes of commercial and residential refrigeration, ice machines and heating & cooling equipment.

Perfect Temp Heating and Cooling is one of the best HVAC contractors in Minneapolis, MN, USA. At Perfect Temp, their commitment is to provide customers with the best possible service experience goes beyond just honoring a warranty or showing up when called upon.

Plano Air Conditioning and Heating, the brand, was started well over 40 years ago. Their greatest hope when users use Plano Air Conditioning and Heating for their air conditioning repairs is that users feel like they have used the best company possible.

Since 2001, Powell Heating & Cooling has been the premier provider of heating and air services in Tippecanoe County. With over 30 years of combined experience, their team is dedicated to delivering exceptional service and unparalleled expertise. As a family and locally owned business, they pride themselves on their commitment to the community, offering reliable and prompt solutions for all HVAC needs.

Prévoté provides globally renowned transport and logistics services, including transport, vehicle rental, logistics and courier solution in Paris, France.

As Temecula Valley’s most dependable and professional HVAC contractor, ProFlo Air Conditioning, Heating & Plumbing strive to keep their reputation in tact. They hold themselves and their work to the highest standard. Their technicians are constantly improving their skill set by frequently completing required training by their heating and air conditioning appliance suppliers.

Prointer Murcia is an HVAC company specialized in generating comfort, complying with the most demanding standards of quality and humane treatment. They provide installation, repair and maintenance of Cooling, Climatization, Heating and Renewable Energy Systems.

Since 2019, ProThermal Heating and Cooling has served as the trusted HVAC contractor in Tulsa, OK, and nearby areas. Each technician on their team maintains certification and professional licenses. They consistently go above and beyond customer expectations, and they stand behind their work.

Puretec is a globally renowned manufacturer of the highest standard of water filters. Their dedication to delivering a wide range of leading-edge products with seamless backup ensures a complete guide to water filtration. Puretec products come with class-leading warranties, are of impeccable quality and are true to their tag line “perfecting water”.

Quality Heating & Air is an expert in HVAC services. They offer retro install estimate, air conditioning repair, heating and cooling services, or emergency heating and cooling repair. With over 15 years of knowledge and experience in the heating & cooling industry, they have all HVAC service needs covered. They are family-owned and operated HVAC contractor dedicated to providing comprehensive heating and cooling solutions.

Quincy Compressor recently acquired the Midstate Air Compressor location in Berlin. They are a dedicated air compressor supplier that works with multiple industries, including aerospace, food and beverage, manufacturing and energy. Their quality systems can meet the demands of any operation.

R.S. Andrews has been in the business of delivering smiles since 1968. They’re proud of the decades of expert and dependable home comfort services they’ve provided to countless homeowners throughout the Greater Atlanta area, Savannah, and the Hilton Head area of South Carolina.

Radialight provides HVAC solutions like heating and air conditioning and is based out of Italy.

REFCOM is the UK's market F-GAS certification scheme, operating since 2009. They help companies make sure that they comply with F gas regulations since 2014.

Refrigeration Design Technologies (RDT) designs and manufactures refrigeration systems for food service operations. RDT has equipment in many restaurants, hotels, casinos, universities, hospitals, prisons, corporate dining facilities, sporting stadiums and theme parks.

With over 75 years of experience and 18 branches spanning across Western Canada, Refrigerative Supply Limited is now one of the country’s leading distributors of residential and commercial HVAC and refrigeration equipment, parts and tools. RSL continues to invest in providing its customers with fast, personable, and reliable service both in-store and online.