- A. O. Smith Water Products Company - produced its first water heater in 1936. Plumbing professionals rely on the large variety of hot water solutions for consumers, worldwide.
- Allied Engineering Company - Manufacturer of Hydronic & Domestic Water Heating Equipment - Gas and Electric Boilers, Tankless Coils, and Electric Boosters.
- Bock - water heaters and storage tanks are perfect for all residential applications, particularly those with high-volume hot water demands. In commercial and industrial applications, our outstanding recovery capabilities make Bock water heaters ideal for everything from light demand to high demand / continuous-use requirements.
- Burnham USB - is America's leading producer of boilers, water heaters and related hydronic equipment for residential and commercial space heating applications.
- Cash Acme - has a solid reputation as a reliable name in the valve business with a range of products including: Mixing, pressure reducing, pressure regulating, safety, temperature, tempering, and thermostatic valves.
- Crown Boilder Co. - View Crown's residential and commercial heating systems and water heaters. Info on specifications, sizing, training. Links to Crown Reps. and component manufacturers.
- ECR International - designs and manufactures hydronic and HVAC equipment for residential, commercial, institutional, and hospitality markets. Distributes boilers, hydronic controls, furnaces, ductless air conditioning systems, vertical packaged air conditioner and heat pumps, and package terminal air conditioners under ten brand names.
- Hays Fluid Controls - is the World Leader in Hydronic Balancing Valve Solutions and NAVY Products.
- Heat Transfer Products,
Inc.- High Efficiency Water Heaters and Boilers for Commercial and Residential Applications - Heat Transfer Products.
- High efficiency Water Heaters, Boilers and Pool Heaters.
- New Yorker Boiler - New Yorker offers a variety of boilers for the residential heating market. We have a complete line of cast iron and steel boilers, some with AFUEs as high as 87.8%
- Patterson-Kelley – A trusted industry pioneer for over 125 years, manufactures and sells a full line of hot water boiler systems, semi-instantaneous and instantaneous water heaters, and continuous process powder blenders and dryers.
- R. W. Beckett Corporation - America’s premiere manufacturer of oil and gas burners for residential and commercial markets.
- Slant/Fin - The next generation of hydronic heating. Slant/Fin is the industry leader in high efficiency boilers and baseboard.
- Suntec- a world-leading supplier of precision-made components for oil burners (pumps, preheaters and solenoid valves).
leading manufacturer of hydronic fan coils in
the United States, specialists in Hydronic
Heating Solutions for Residential, Commercial
and Industrial applications.
- Viessmann - Comprehensive product range of heating systems, oil, gas, wood, solar and heat pumps.