- Roberts-Gordon Inc
- Rovac Corp
- Roy F Johnson Co
- Runtal North America
- Runtal North America
- Rupp Air Systems Inc
- Ryan Associates
- S T Johnson Co
- Sage Corp
- Sandy Springs Heating & Air
- Scheu Products Co
- Seahorse
- Security Supply Corp
- Security Supply Corp
- Sid Harvey's
- Siebring Manufacturing Co
- Snow & Jones Plumbing & Htg
- Snug-A-Bug Solar & Traditional
- Snug-A-Bug Solar & Traditional
- So Mi Co Supply Inc
- Solar Distributors Inc
- Solar-10 Inc
- Solarflo Corp
- Solaronics Inc
- Solaronics Inc
- Southern Burner Co
- Southwest Air Conditioning Inc
- Spf Window Tinting
- Springfield Heating & Plbg Inc
- Springfield Wire Inc
- Springfield Wire Inc
- Stanley Iron Works
- Star Heating & Ventilating Inc
- Steamaster Co Inc
- Stego Inc
- Stone Air
- Suburban Manufacturing Co
- Sun Energy Systems
- Sun Energy Systems
- Sunderman Manufacturing Co
- Superior Mechanical Svc
- Sure-Flame Mfg
- Taco Inc
- Takagi Industrial Co USA Inc
- Taylor Manufacturing Inc
- Therma-Tech Corp
- Thermal Energy Storage Inc
- Thermo Products LLC
- Thermon West
- Thrifty Supply Co-Tacoma Inc
- Tioga Inc
- Titan Air Inc
- Tithe Corp
- Trane Co
- Trane Co
- Trane Commercial Systems
- Trane Commercial Systems
- Tri-County Gas Co
- Turbo Burn Inc
- Tyco Thermal Controls
- Tyco Thermal Controls
- Ultimate Products
- United State Stove Co
- Uponor Wirsbo Co
- Urell Co
- Utah Air Sales
- Volcanic Heater Inc
- Voorheis Industries Inc
- Waterpik Technologies
- Watlow Industries
- Wayne Combustion Systems
- Weather-Rite
- Weatherizer Home Improvements
- Western Outdoor Wholesale
- Westwood Products Inc
- Williams & Davis Boilers Inc
- Yandle-Witherspoon Supply Inc
- Yandle-Witherspoon Supply Inc
- Yazaki Energy Systems Inc
