Tankless Water Heater Requirements

Determine the mounting space.

Tankless water heater requirements.

Around the water heater. Vent termination all tankless water heater vents must terminate at least 4 feet from a property line. 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 first permit is for the water heater itself.

The models which need combustion air from the outside are required to have a second hose which is supposed to be put in. With a condensing tankless water heater you don t need metal venting. How to determine the required size of a tankless hot water heater. Enclosed areas just as closets might need air ducts and extra air inlets.

Non condensing tankless water heaters typically transfer to the water only about 80 percent of the heat they generate. Determine your water flow rates. 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 heaters are much smaller than units with a storage tank allowing them to be wall mounted.

Today tankless water heater energy factors range between 64 and 91 for gas fired models and up to 99 for electric models. You re only looking at 20 to 100 out of pocket as opposed to several hundred dollars to call in a plumber. 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.

The higher the energy factor the more efficient the water heater. This is as easy as heading down to the local planning or building department to ask for one. Ok so san jose has the following requirements for where to install the tankless water heater. Measure your cold water temperature.

The remaining heat creates a hot exhaust gas that requires metal venting typically stainless steel or thick aluminum. How much does a water heater permit cost. For a household of one or two people a tankless electric unit will probably be adequate.