Tankless Water Heater Requirements

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

Tankless water heater requirements.

For a household of one or two people a tankless electric unit will probably be adequate. Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise. How much does a water heater permit cost. Tankless water heaters are much smaller than units with a storage tank allowing them to be wall mounted.

Tankless water heaters can be 8 14 more energy efficient for homes that use a lot of hot water around 86 gallons per day. Measure your cold water temperature. Around the water heater. Enclosed areas just as closets might need air ducts and extra air inlets.

How to determine the required size of a tankless hot water heater. The models which need combustion air from the outside are required to have a second hose which is supposed to be put in. Determine the mounting space. The first permit is for the water heater itself.

This is as easy as heading down to the local planning or building department to ask for one. 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. Ok so san jose has the following requirements for where to install the tankless water heater. Today tankless water heater energy factors range between 64 and 91 for gas fired models and up to 99 for electric models.

Non condensing tankless water heaters typically transfer to the water only about 80 percent of the heat they generate. As a general rule any gas heater which is tankless uses combustion air must have a minimum area of 10 000 cu. Restrictions on gas fueled tankless water heaters no gas appliance may be located in a room used. Determine your water flow rates.

The remaining heat creates a hot exhaust gas that requires metal venting typically stainless steel or thick aluminum. With a condensing tankless water heater you don t need metal venting. Simply locate the appropriate water heater sizes on ecomfort using your information.