Tankless Water Heater Condensate Drain Code

Condensate switches imc 307 2 3 states that all hvac equipment that produces condensate must have either a secondary drain line or a condensate overflow switch a secondary drain pan with a secondary drain line or condensate switch or some combination of these installations should be used to prevent overflow if the primary drain line blocks.

Tankless water heater condensate drain code.

Power vent and power direct vent heaters are equipped with the condensate drain so the water vapor from the exhaust gases will roll down the pvc vent pipe and through the drain port out. Tankless water heater requirements department of planning building 250 frank h. The recommendation is to get a condensate drain kit for convenient draining and metal drain pans to protect the room where the heater is installed. If the water heater thermostat fails to turn off at its temperature setting and continues to heat the water indefinitely the tpr valve will open and let the overheated water out.

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. Water vapor is a byproduct of combustion although in this case the vapor contains elements such as methane nitrogen and oxygen. But if the termination of the piping is not readily visible such as if it is located under the house the water will continue to drain until the homeowner gets an. Inside a condensing tankless water heater the combustion process superheats the water that enters your shower sink etc.