Tankless Water Heater Requirements

For a household of one or two people a tankless electric unit will probably be adequate.

Tankless water heater requirements.

Ok so san jose has the following requirements for where to install the tankless water heater. Once you have your total flow rate and the required temperature rise you can find the right size tankless water heater for your home. Restrictions on gas fueled tankless water heaters no gas appliance may be located in a room used. As a general rule any gas heater which is tankless uses combustion air must have a minimum area of 10 000 cu.

The models which need combustion air from the outside are required to have a second hose which is supposed to be put in. 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. 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.

The remaining heat creates a hot exhaust gas that requires metal venting typically stainless steel or thick aluminum. Non condensing tankless water heaters typically transfer to the water only about 80 percent of the heat they generate. The first permit is for the water heater itself. 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. Measure your cold water temperature. Vent termination all tankless water heater vents must terminate at least 4 feet from a property line. This is as easy as heading down to the local planning or building department to ask for one.

How to determine the required size of a tankless hot water heater. Determine the mounting space. The higher the energy factor the more efficient the water heater. Determine your water flow rates.

Tankless water heaters are much smaller than units with a storage tank allowing them to be wall mounted. Around the water heater. Simply locate the appropriate water heater sizes on ecomfort using your information.