Fixtures:http://www.us.kohler.com/us/        

  Whirlpool Spas: www.bainultra.com  

Water Heaters:www.statewaterheaters.com

Boilers:www.buderus.us      

On demand water heaters:www.rinnai.us      

Furnaces: www.york.com/residential       www.heil-hvac.com 

Air Handlers and Mini Split systems: comfortstarusa.com