S U F S E R V I C E H A N D B O O K
I N S T A L L A T I O N
AIR REQUIREMENTS
MINIMUM AIR FOR COMBUSTION 10 Cubic Feet of Air Per 1000 BTUH
Stoichiometric or theoretical complete combustion requires 10 cubic feet of air per 1000 BTUH of gas input. The National Fuel Gas Code also recommends an additional 2.5 cu.ft. of “excess air”. This 12.5 cu.ft. minimum supply air per 1000 BTUH input applies to natural and propane gas mod- els.
The National Fuel Code also specifies minimum
MAKE-UP AIR
Direct Vent Installation
This model is approved for direct venting either horizontally or vertically or conventional venting horizontal or vertical. Direct venting avoids using room air for combustion and eliminates the need for additional air intake ducts.
State Water Heaters | 9 | Technical Training Department |
Ashland City, Tennessee © 2004 |
