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Lochinvar · Heating and Energy Management

EnergyRite pool and spa heater (ERN / ERL)

Compact low-NOx gas heater for light commercial pools and spas

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← Back to all productsRequest availabilityFacts verified against manufacturer literature 2026-09-16.

Overview

EnergyRite is Lochinvar's gas pool and spa heater for residential and light commercial pools, offered in 250,000, 300,000, and 399,000 Btu/hr inputs with natural gas or propane firing. It uses a commercial-grade heat exchanger with an ASME-stamped option and cupro-nickel variant, low-NOx combustion, soft-touch digital controls, and indoor or outdoor venting configurations. It suits hotel, camp, and small institutional pools and spas that need a compact, code-approved heater.

Is this a fit for your facility?

Usually a fit when

  • Hotel and club pools and spas
  • Camp and seasonal pools
  • Therapy pools
  • Small school and community pools

Ideal facilities and conditions: Hotel and club pools and spas; Camp and seasonal pools; Therapy pools; Small school and community pools.

Problems it addresses

Key capabilities and benefits

Capabilities

  • 250,000 to 399,000 Btu/hr input; natural gas or propane
  • Commercial-grade heat exchanger; ASME (HLW) and cupro-nickel options
  • Low-NOx emissions (manufacturer statement)
  • Digital display with soft-touch controls
  • Conventional, direct-air, sidewall, outdoor and power-assist venting options
  • 3-year limited heat exchanger and 2-year parts warranty (ERN402 page)

Available models and configurations

ERN252 / ERN302 / ERN402 (and -A ASME variants)Natural gas; 250k, 300k, 399k Btu/hr
ERL252 / ERL302 / ERL402 (and -A ASME variants)Propane; 250k, 300k, 399k Btu/hr

Technical specifications

Input range250,000 / 300,000 / 399,000 Btu/hrSource: lochinvar.com commercial pool heaters listing
ERN402 dimensions / weight26.5 in H x 46.25 in W; 288 lb shippingSource: lochinvar.com ERN402 page
PositioningResidential and light commercialSource: lochinvar.com ERN402 page

Specifications are summarized from manufacturer literature and depend on configuration. Confirm current values with FreyTech before design.

Installation requirements and retrofit considerations

Installation requirements, utilities, and clearances are confirmed with the manufacturer's installation manual and your engineer during evaluation.

Integration with other equipment

No equipment integrations are documented for this product. Coordination happens through the design team.

FreyTech's role: design, installation, commissioning, training, support

Project services

  • Evaluation of fit for your facility
  • Availability, lead time, and service coverage confirmed on request
  • Installation and support coordination where offered

Ongoing service and support

  • Parts and warranty coordination on request

Brochures, manuals, warranties and specifications

All resources for EnergyRite pool and spa heater (ERN / ERL) · Request documents

Related products

See the Heating and Energy Management category.

Related solutions: Modernize an aging equipment room · Reduce water, chemical, energy or labor waste · Find replacement equipment · Prepare specifications or capital-project budgets

Next step

Is EnergyRite pool and spa heater (ERN / ERL) right for your facility?

Send us your pool volumes, current equipment, and what is not working. A specialist will review fit honestly and recommend next steps.

Serving commercial aquatic facilities across New York State.

Request a Facility AssessmentTalk to a Water-Quality Specialist

Prefer to talk? 1-800-724-2770