Tankless Water Heater Requirements

The higher the energy factor the more efficient the water heater.

Tankless water heater requirements.

Around the water heater. How much does a water heater permit cost. The remaining heat creates a hot exhaust gas that requires metal venting typically stainless steel or thick aluminum. Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise.

Enclosed areas just as closets might need air ducts and extra air inlets. Vent termination all tankless water heater vents must terminate at least 4 feet from a property line. Tankless water heaters are much smaller than units with a storage tank allowing them to be wall mounted. As a general rule any gas heater which is tankless uses combustion air must have a minimum area of 10 000 cu.

Once you have your total flow rate and the required temperature rise you can find the right size tankless water heater for your home. Determine the mounting space. Restrictions on gas fueled tankless water heaters no gas appliance may be located in a room used. Measure your cold water temperature.

Determine your water flow rates. How to determine the required size of a tankless hot water heater. For homes that use 41 gallons or less of hot water daily demand water heaters can be 24 34 more energy efficient than conventional storage tank water heaters. This is as easy as heading down to the local planning or building department to ask for one.

The models which need combustion air from the outside are required to have a second hose which is supposed to be put in. The first permit is for the water heater itself. Ok so san jose has the following requirements for where to install the tankless water heater. Simply locate the appropriate water heater sizes on ecomfort using your information.

With a condensing tankless water heater you don t need metal venting. Tankless water heaters can be 8 14 more energy efficient for homes that use a lot of hot water around 86 gallons per day. Non condensing tankless water heaters typically transfer to the water only about 80 percent of the heat they generate.