Tankless Water Heater Wiring Requirements

Wiring should be sized to maintain a voltage drop of less than 3 under load.

Tankless water heater wiring requirements.

How tankless water heaters work. Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise. 1 x 40 amps dp. 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 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. Tankless water heater vent clearances if the unit is vented to the outside then it needs 12 inches of clearance from a door or window. Many water heaters especially traditional electric ones require changes to your wiring and potentially the breaker box. If you need additional space in the panel for the circuit breaker then a quad circuit breaker may be.

Electrical wiring and circuit requirements for a tank less water heater a tankless water heater will require a dedicated circuit as specified by the installation manual of the unit that has. The unit then heats the water using either a gas burner or an. 1 x 30 amps. 3 x 40 amps dp.

3 x 40 amps dp. Beyond a water heater permit some areas may also require either an electric or plumbing permit depending on the type of water heater. Recommended minimum wire gauge. Some codes require use of electrical sub panel for installation especially when heater is not mounted within line of sight of the main electrical panel.

This unit is a 2 chamber model requires at least one 20 amp breaker requires at standard 120 volt electric outlet and requires a wire gauge size 12. 2 x 40 amps dp. The specifications for each model are listed on this website. 4 x 40 amps dp.

Simply locate the appropriate water heater sizes on ecomfort using your information. Once you have your total flow rate and the required temperature rise you can find the right size tankless water heater for your home. If the window does not open the tankless water heater clearance from a window requires a 12 inch setback. This model is also for a point of of use low flow sink faucet and can also be used for a solar water heater booster or a storage tank booster.

The above specifications are only guidelines. Tankless water heaters also known as demand type on demand or instantaneous water heaters heat water directly without the need to store water. A tankless heater has a flow sensing device that is activated whenever a hot water tap is opened. Tempra series tankless water heaters are designed to use the same 208 240 volt current that your conventional electric tank type water heater uses however it will require a larger breaker and likely a heavier gauge of wiring.