Tankless Water Heater Voltage Requirements

Today tankless water heater energy factors range between 64 and 91 for gas fired models and up to 99 for electric models.

Tankless water heater voltage requirements.

Rinnai tankless water heaters require 120 volts ac 60 hz and less than three amps. Tankless water heaters can be 8 14 more energy efficient for homes that use a lot of hot water around 86 gallons per day. For both gas and electric models a tankless water heater s overall energy efficiency is measured using an energy factor ef rating. Recommended household electric service.

This means you will have to upgrade your electrical system to accommodate for the larger load demand which could cost you up to 1 500. For example an electric tankless heater that is rated at raising the water temperature 55 degrees at 1 5 gpm will supply you with a 120 degree temperature if the incoming water is 65 f or higher. Carpentry although you won t be working with wood you need to be familiar with levels to ensure a level base and may need to anchor pipes to ceiling beams. 4 x 40 amps dp.

1 x 6 awg copper. Electrical even gas water heaters have electrical parts and need to be hooked up to your breaker box. This ef rating is based on test procedures developed by the u s. Recommended minimum wire gauge.

Natural gas and propane tankless water heaters don t need much electricity and are 8 50 more effective than traditional tank style water heaters. Unfortunately the average electric tankless water heater needs at least 120 amps to operate and the average household s total capacity is 200 amps.