Combustion Air Requirements For Water Heater

What is combustion air.

Combustion air requirements for water heater.

In this post we ll discuss combustion air including what happens if we don t have enough and what the requirements are for enough there are two basic ways for your furnace to get its combustion air. Furnace btu s water heater btu s dryer btu s total btu s 80 000 35 000 27 000 142 000 btu s 142 000 btu x 50 1 000 7 100 cubic feet required room size of. Air ducts required for combustion must be at least. If in the home and drawing air from the home then the door should probably be sealed with weather stripping and combustion air brought in from the attic with a pipe just abobe floor level.

Also a screened opening in the ceiling for ventilation for the unit. One combustion air opening must be installed within 12 inches of the water heater s upper enclosure and another within 12 inches of the lower. When a residential gas fired water heater is installed in a closet the heater combustion gases must be vented to the outside of the residence and the fresh air needed for combustion. It is the air necessary for a gas appliance such as a water heater to function properly.

With the second hose being located in the proximity of the furnace and hot water heater it can detect a negative pressure due to the air going up the chimney and open the damper doors. The air that your gas furnace and water heater and boiler needs in order to burn safely is called combustion air. Combustion air standard method alternate calculation method step 1. Combustion air defects at heating boilers furnaces water heaters diagnose signs of inadequate combustion air for an oil or gas burner dangers of carbon monoxide poisoning if there is soot production at gas fired heating appliances inadequate combustion air can cause dangerous carbon monoxide gas in buildings combustion air safety check procedure for gas fired heating equipment how to test.

While chapter 5 of the uniform plumbing code is titled water heaters it also addresses combustion air chimneys different types of gas vent materials exhaust gas venting etc. Not to get too basic here but gas appliances require a certain amount of air to be used for combustion much the same way that the fire in your fireplace needs air to get started and to keep burning. 1000 sf x 6 5 feet high 6 500 cubic feet insufficient combustion air. In the 2000 edition of the upc chapter 5 was 9 pages with 3 sizing tables.

Length width height room volume. Calculate the room volume. Calculate the room volume. Water heater space heater range other total total 1000 step 2.

Either draw combustion air from entire basement or outside air entire basement area.