Heating Appliances - Gas / Oil

Furnaces, Steam Boilers, Water Boilers, Pool Heaters, Laundry, Building Heating Equipment, Gas Fireplaces, etc.

CAT I	Appliances operate with 0 or negative pressure at the appliance outlet and at temperatures where condensation of flue gases IS NOT likely.

CAT II	Appliances operate with 0 or negative pressure at the appliance outlet and at temperatures where condensation of flue gases IS likely. Few appliances fall in this category today.

CAT III	Appliances operate with positive pressure at the appliance outlet and at temperatures where condensation of flue gases IS NOT likely.

CAT IV	Appliances operate with positive pressure at the appliance outlet and at temperatures where condensation of flue gases IS likely.

CAT I Appliance vents @ 0 or negative pressure NON-Condensing. Preferred Product: B-VENT Options: PSW, PIC, IPIC-1, -2, -4		CAT II Appliance vents @ 0 or negative pressure CONDENSING. Preferred Product: CORR/GUARD II - CORR/GUARD Option: None
CAT III Appiance vents @ postive pressure NON-Condensing. Preferred Products: PSW, PIC, IPIC-1, -2, -4 Option: C/G II - CORR/GUARD(Temp limitations)		CAT IV Appliance vents @ postive pressure CONDENSING. Preferred Product: CORR/GUARD II - CORR/GUARD Options: Consult Appliance Manufacturer