Tankless Water Heater Wiring Requirements

Once you have your total flow rate and the required temperature rise you can find the right size tankless water heater for your home.

Tankless water heater wiring requirements.

1 x 30 amps. 1 x 40 amps dp. 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. Below we ve highlighted what size water heater you would need in our example of 6 5 gpm at a 63 f temperature rise.

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. Tankless water heaters can be 8 14 more energy efficient for homes that use a lot of hot water around 86 gallons per day. 4 x 40 amps dp.

1 x 60 amps dp. Wiring should be sized to maintain a voltage drop of less than 3 under load. 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.

The above specifications are only guidelines. 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. Please consult your electrician for more details. 3 x 40 amps dp.

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. Recommended minimum wire gauge. If you need additional space in the panel for the circuit breaker then a quad circuit breaker may be. Tankless water heaters should not be installed near dryer vents or intake air vents.

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. The specifications for each model are listed on this website. 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. How tankless water heaters work.

If the window does not open the tankless water heater clearance from a window requires a 12 inch setback. Tankless water heaters also known as demand type on demand or instantaneous water heaters heat water directly without the need to store water. Beyond a water heater permit some areas may also require either an electric or plumbing permit depending on the type of water heater. 3 x 40 amps dp.