Tankless Water Heater Gas Line Requirements

Rinnai tankless water heaters are designed to provide maximum performance and efficiency using either a 3 4 or 1 2 gas line as long as sufficient gas flow is available.

Tankless water heater gas line requirements.

Today tankless water heater energy factors range between 64 and 91 for gas fired models and up to 99 for electric models. This does not mean that a tankless water heater uses more gas. If money or return on investment is the principal reason you are considering converting to a demand type water heater you should perform an accurate total cost analysis that reflects all of the costs to install operate maintain both types of water heaters. An undersized gas line can stress a tankless system and possibly reduce its lifespan all rinnai tankless water heaters are equipped with technology that safely ceases.

Electrical even gas water heaters have electrical parts and need to be hooked up to your breaker box. Tankless water heaters are much smaller than units with a storage tank allowing them to be wall mounted. To heat the water quicker and more efficiently tankless water heaters operate with higher btus and require a minimum gas line. 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.

Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise. 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. The flow sensor activates to determine the amount of hot water needed. Cold water passes through the heat exchanger.

For both gas and electric models a tankless water heater s overall energy efficiency is measured using an energy factor ef rating. Once you have your total flow rate and the required temperature rise you can find the right size tankless water heater for your home. A tank type water heater and a tankless or demand water heater for. Simply locate the appropriate water heater sizes on ecomfort using your information.

This ef rating is based on test procedures developed by the u s. Electric units have measurements in the 10 inch high to 7 inch wide range while gas fired. The gas control valve opens to supply the correct amount of gas. This guide outlines a typical gas tankless water heater installation with easily available tools and materials.

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. Gas line requirements all new and altered gas piping systems must be pressure tested as prescribed.