Professor Gatsby’s are dedicated to delivering comfort, reliability, and quality in every service they provide. From their skilled HVAC and plumbing experts to their hardworking dispatch team, each member plays a vital role in keeping homes and businesses running smoothly. With professionalism, expertise, and a commitment to customer satisfaction, they’re proud to make a difference every day.

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.

Promethium has developed a novel photocatalytic air purification system capable of providing a cheaper and more effective method of filtering impurities, pathogens, and aerosols from the air.

The PROPARTS line of products provide quality system solutions at a great value and price for air conditioning and heating needs. PROPARTS features a solid lineup of aftermarket parts, supplies and universal HVAC accessories.

Established in 2019, Propel Air Fans is built upon the core belief that keeping cool should not be a luxury that is unaffordable. Propel Air sets a goal to make a product that improves the lives of those without proper airflow. Propel Air's purpose is to ensure that a desired space is a place that is cool and enjoyable. The company offers two large industrial fans, the Model 1 and the Model 2, for commercial use.

Protec provides quality products and services to the air conditioning market in South Florida, Latin America and the Caribbean.

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.

Proximity Systems, Inc. is a globally renowned provider of innovative health care furniture and HVAC technology solutions. From hospital examination rooms to training centers and airports, the company's diverse line of wall-mounted workstations, UVC disinfection devices, medicine cabinets, retail kiosks, and modular units enable caregivers, customers, and technology to interact in a safe, seamless, and effective manner.

PSR Mechanical, established in Seattle in 1945 serves clients throughout the Puget Sound Region. PSR is a division of Service Logic, the largest privately held Energy and HVAC Mechanical Services Companies in the United States.

PTubes, Inc. is the US subsidiary of Feinroren S.p.A. - Italy. They are a renowned manufacturer of copper refrigeration coils, pipe and pre-insulated copper coils for the HVAC industry.

Pueblo has grown to one of the largest, most multifaceted mechanical contractors in Arizona. It performs a broad offering of HVAC, Plumbing, and Controls installation, maintenance, and repair services for governmental, industrial, commercial, and healthcare facilities throughout Arizona.

Pump Systems LLC is a distributor of Water and Wastewater Equipment providing sales, service, and repair throughout the State of Ohio. Headquartered in Medina, OH, they focus on providing the best solutions for the municipal, commercial, and industrial markets.

Pump2Save helps homeowners find the perfect heat pump solutions and maximize their energy savings through comprehensive reviews, comparisons, and rebate guidance.

Established in 1969, Purafil is a globally-renowned provider of molecular air filtration and indoor air quality (IAQ) solutions. They also provide a wide range of air filtration, air conditioning, odor control, corrosion control, toxic gas filtration, monitoring and chemical filtration solutions.

Pure Air Control Services Inc is a US-based and nationally recognized indoor air quality (IAQ) firm, headquartered in Clearwater, Florida. The company is known for its indoor air quality (IAQ) services and solutions.

Pure Air Solutions is a family-owned HVAC business with over 20 years of experience, serving Thornton, Colorado, and nearby areas. They specialize in AC and furnace repair and installation, improving indoor air quality with reliable service and high-quality products. From immediate repairs to full installations, their knowledgeable team ensures top results.

Discover Pure n Natural Systems, the source for advanced air purifier and water filtration systems. With humidity control products and U.S.-based reliability, they bring healthier environments to homes, offices, and commercial spaces.

PureAC is the first automated disinfecting device for window & wall-mounted air conditioning and heating systems that instantly kills and inhibits mold, mildew, bacteria, and germs. It's the perfect solution for in-between professional servicing.

With headquarters in Phoenix, Arizona, PuriFi Labs is committed to bringing safety and security back to the world by purifying indoor air and surfaces for homes and businesses. PuriFi Lab’s patented technology was rigorously researched and tested in varied applications for more than two years before being made available to consumers.

Baltimore, MD – A large cellular company had an existing cooling tower which was presenting maintenance challenges. Debris build up was requiring maintenance more frequently than regularly scheduled PM’s. It was simply more than they could keep up with, and the debris was causing inefficiencies within other equipment as well.

PVI - A WATTS Brand specializes in the manufacture of duplex stainless steel, ASME, commercial watereaters and storage tanks. They also deal with energy sources including gas, electric, steam, boiler water, and combinations of energies.

Q-PAC designs and manufactures advanced commercial HVAC fans, with its flagship product being its Multimotor Plenum Fan (MPF). Designed as a smarter alternative to traditional fan arrays and blowers, the Q-PAC Fan is a fully integrated solution that offers built-in redundancy, fast installation, and compatibility with modern building automation systems.

QE QUALITY is a fully integrated design, manufacturing, and distribution company in the HVAC/R industry. They also offer copper tubing, cold controls, copper fittings, contactors, fan blades, hard start kits, motors, thermostats, timer defrost controls, transformers, vibration eliminators.

Introducing the industry’s highest efficiency, highest power factor, money-saving electric fan motor for refrigeration and HVAC applications. Q-Sync circuitry operates the motor at the same frequency as the AC power line and eliminates the AC to DC power conversions from its circuit (no AC-to-DC rectifier, no DC link, and no DC-to-AC inverter)

Qolsys Inc is a pioneer residential and commercial security and smart-home manufacturer. They provide smart thermostat, video monitoring, energy management and home automation.

QTI is the unparalleled in world-class temperature sensing technology with over 40 years of proven expertise in NTC and PTC thermistors, RTDs, thermocouples, and more.

QCCAir is a trusted and experienced HVAC company dedicated to delivering dependable heating, ventilation, and air conditioning solutions. With years of hands-on industry experience, they’ve built a strong reputation for quality workmanship, honest service, and customer-first values. Their certified technicians are trained to handle everything from routine maintenance to complex system installations, always ensuring comfort and satisfaction.

Quality Comfort Home Services (formerly Quality Comfort Heating & Cooling) based in Cincinnati, OH offers a diverse range of HVAC services to residential and light commercial clients. Their expert HVAC services include air conditioner and furnace repair, heating and cooling maintenance, new furnace, heat pump or AC installations, ductless mini split ACs and more.

Quality Compressor has been providing remanufactured compressors and parts to the HVAC/R industry since 1984. They offer knowledgeable and courteous customer service and technical support both before and well after the sale.

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.