Peirce 43 Conyngham Ave Phelps 18702-5600 is one of the 50 largest HVAC supply houses in the country and continues grow and aggressively expand its residential and commercial customer base. AREAS SERVED: Peirce-Phelps operates HVAC supply houses in Pennsylvania North Carolina Maryland New Jersey and Delaware. What Brands Does Peirce-Phelps Sell? Peirce-Phelps carries name brand HVAC supplies from Appion Bacharach Beckett Braeburn Bryant Carlyle Carrier Coleman Cooper Diversitech Dwyer Field Controls First Company Friedrich Frigidaire General Hart & Cooley Honeywell ICM Imperial JB Klein Lambro Lars Lenox Lux Magicaire Mitsubishi Mueller Nu-Calgon Oatey Packard Parker Hannifin Rectorseal Refco RGF Rinnai Ritchie Robertshaw Slimduct Superior Tecumseh Tjerland Toshiba Trion Venstar Watts White Rodgers York as well as many others.