Jas Alloy

Established in 1977, Plenums Incorporated designs, manufactures and installs heating, ventilation and air conditioning (HVAC) accessories. Based in Pinellas Park, Fla., the company offers a range of products, including adapter curbs, knock down curbs, metal building roof curbs, drop box concentric converter and flush mount concentric converter. In addition, it provides outside air hoods, mixing box units, burglar bar inserts, power exhaust units, horizontal economizers, coil and hail guards and aluminum vibration isolation rails. Plenums Incorporated caters to distributors, manufacturer representatives, and original equipment manufacturers (OEMs).