Tankless Water Heater Requirements

Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise.

Tankless water heater requirements.

Enclosed areas just as closets might need air ducts and extra air inlets. Tankless water heaters can be 8 14 more energy efficient for homes that use a lot of hot water around 86 gallons per day. Today tankless water heater energy factors range between 64 and 91 for gas fired models and up to 99 for electric models. How to determine the required size of a tankless hot water heater.

For a household of one or two people a tankless electric unit will probably be adequate. Determine your water flow rates. Around the water heater. Ok so san jose has the following requirements for where to install the tankless water heater.

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. As a general rule any gas heater which is tankless uses combustion air must have a minimum area of 10 000 cu. Measure your cold water temperature.

The models which need combustion air from the outside are required to have a second hose which is supposed to be put in. The higher the energy factor the more efficient the water heater. Simply locate the appropriate water heater sizes on ecomfort using your information. Non condensing tankless water heaters typically transfer to the water only about 80 percent of the heat they generate.

Tankless water heaters are much smaller than units with a storage tank allowing them to be wall mounted. The remaining heat creates a hot exhaust gas that requires metal venting typically stainless steel or thick aluminum. You re only looking at 20 to 100 out of pocket as opposed to several hundred dollars to call in a plumber. With a condensing tankless water heater you don t need metal venting.

The first permit is for the water heater itself. Determine the mounting space. How much does a water heater permit cost.