Gas Tankless Water Heater Installation Requirements

For both gas and electric models a tankless water heater s overall energy efficiency is measured using an energy factor ef rating.

Gas tankless water heater installation requirements. This guide outlines a typical gas tankless water heater installation with easily available tools and materials. A tank type water heater and a tankless or demand water heater for. This ef rating is based on test procedures developed by the u s. Mount the tankless water heater to the wall using the existing wall studs or build a new frame using 2 x 4 lumber.

Today tankless water heater energy factors range between 64 and 91 for gas fired models and up to 99 for electric models. 6 rv53i rv53e operation and installation manual this water heater will attempt to provide hot water at the temperature setting even when the water flow is varied or when more than 1 tap is in use. The available temperatures for a given model are provided below. Although condensing tankless units require this additional step and are a bit more expensive than non condensing models their cooler exhaust gas temperatures allow for the use of less expensive plastic venting pipe whereas the high temperature flue gases of non condensing tankless water heaters require more costly stainless steel vents.

The water heater can deliver water at only one temperature setting at a time. Water heaters located in the garage may terminate on the garage floor with the same distance requirements cpc 505 6 cpc 505 4 508 5 608 5 t p does not discharge into a water heater drain pan. Tankless water heaters are much smaller than units with a storage tank allowing them to be wall mounted. Electrical even gas water heaters have electrical parts and need to be hooked up to your breaker box.

Whether gas or electric tankless water heaters heat water only as it is needed and may save up to 70 percent on a yearly heating bill. Plumbing the most important skill is needed for working with both gas and water lines installing fixtures and ensuring there are no potential leaks or pressure issues. Restrictions on gas fueled tankless water heaters no gas appliance may be located in a room used for sleeping a bathroom a clothes closet or in a closet or other confined space opening into or having access from a bedroom or bathroom. Electric units have measurements in the 10 inch high to 7 inch wide range while gas fired.

Turn off the water electricity and gas supply to the old water heater. If it is needed install new supply lines for gas and water either solid or flexible. Cpc508 5 provide gas line sizing calculations and isometric riser diagram of the gas delivery piping system for the equipment with permit application.