Tankless Water Heater In Attic Code

Code expert glenn mathewson describes 10 common water heater code issues including confusion about drip pans and drains unsupported expansion tanks and plastic vents lack of combustion air and more.

Tankless water heater in attic code.

All tankless units have a minimum flow rate which must be achieved before the water heater will start heating water. The installation code for a tankless water heater varies a lot by location. We had originally planned to have the water heaters on the. How much does a water heater permit cost.

You re only looking at 20 to 100 out of pocket as opposed to several hundred dollars to call in a plumber. This drain pan must be equipped with a pipe at least 3 4 of an inch in diameter which drains into a floor drain. Attics containing a water heater shall be provided with an opening and unobstructed passageway large enough to allow removal of the water heater the passageway shall be not less than 30 inches 762 mm in height and 22 inches 559 mm in width and not more than 20 feet 6096 mm in length when measured along the centerline of the passageway from the opening to the water heater. Tankless water heaters can be vented in two ways.

Gas tankless water heaters don t have to use indoor air for combustion. I randomly picked san jose california as an imaginary location for us to do our home installation. Since it would not be economical of me to provide the codes for every town in the united states and canada let me just give an example. Other solutions may be to clean out the inlet water filter on the water heater or turn down the temperature on the unit.

Before you decide against a tankless water heater for your next project consider these tankless water heater venting requirements. This is as easy as heading down to the local planning or building department to ask for one. Often low flow showerheads or fixtures cause the problem so the aerators inside should be removed. Facts about tankless water heater venting.

When installed water heaters must be equipped with a drain pan at least 1 5 inches deep large enough to catch condensation and other drips from any spot on the bottom of the water heater. The first permit is for the water heater itself. My contractor recently suggested that instead of having 2 tankless water heaters at opposite sides of my almost new construction single story house 4 5 baths laundry and kitchen i may want to consider a single larger unit in the attic. Cpc 508 4 required access clearances to combustibles and vent termination location per manufacturer s instructions.

Not installed in attic or other spaces where damage may result from a leaking water heater without an approved safe pan beneath the water heater with a minimum inch drain to an approved readily visible location.