Lochinvar EnergyRite ERN-402 400K BTU natural gas pool heaterLochinvar EnergyRite ERN-402 Pool Heater, 400K BTU, Natural Gas, 100143232$4,09399
Lochinvar EnergyRite ERN-402 400K BTU natural gas pool heater

Lochinvar EnergyRite ERN-402 Pool Heater, 400K BTU, Natural Gas, 100143232

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$4,09399
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Quick overview

  • 400K BTU A 400,000 BTU input heater, sized for larger residential and light commercial bodies of water.
  • Natural gas Built for natural gas. It is not a propane unit and gas type cannot be assumed at the meter.
  • Electronic ignition No standing pilot to relight, the heater lights on demand.
  • Digital controls Setpoint and status are read and set from a digital control panel.
  • Indoor or outdoor Rated for either installation, so venting and clearances follow the manual for the location you choose.
  • Elevation limit Rated for 0 to 2,000 ft. Above that range the unit needs a different rating, and this is a hard limit rather than a suggestion.
Full description and specifications ↓

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Product details

The Lochinvar ERN-402 is a 400,000 BTU natural gas pool heater from the EnergyRite family, supplied under part number 100143232. It uses electronic ignition and a digital control panel, and it is rated for indoor or outdoor installation.

What the 400K rating buys

Input rating is what decides how quickly a body of water comes up to temperature and how well it holds that temperature against cool nights and wind. At 400,000 BTU this is a serious heater, aimed at larger residential pools and light commercial water rather than a small backyard pool, where a smaller unit would be the better match.

Controls and ignition

Electronic ignition means there is no standing pilot burning fuel between calls for heat and nothing to relight after a windy night. The digital panel gives you a readable setpoint and a clear status, which makes diagnosing a fault far quicker than reading a mechanical thermostat and a pilot flame.

Plan the installation before you order

Three things decide whether this heater suits your site. It is the natural gas version, so confirm the gas type at the meter. It is rated for 0 to 2,000 ft. of elevation, and that ceiling is firm. And it should be connected by a licensed gas fitter, who will size the gas line, verify supply pressure and set up venting for an indoor or outdoor location.

Specifications
Brand Lochinvar
Manufacturer part number 100143232
Model ERN-402
Family EnergyRite
Type Gas pool heater
BTU rating 400K
Gas type Natural Gas
Ignition Electronic
Controls Digital
Installation location Indoor/Outdoor
Elevation 0 to 2,000 ft.
Shipping weight 240 lb
Ships Freight

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Questions and answers

What people ask about this product, answered by our pool techs.

Will this run on propane?
No. The ERN-402 in this listing is the natural gas version. Confirm the gas supply at the meter before ordering, because the gas type is set at the factory.
Can it be installed indoors?
It is rated for indoor or outdoor installation. An indoor install brings venting and combustion air requirements with it, so follow the manual and local code for the location.
What does the elevation rating mean for me?
The heater is rated for 0 to 2,000 ft. above sea level. If your site sits higher than that, this is the wrong unit and you need the high altitude rating instead.
Do I need a professional to install it?
Yes. Gas heaters should be connected by a licensed gas fitter, who will size the gas line, confirm the supply pressure and handle venting. It is not a homeowner install.
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