The Hayward HeatPro HP21004TC 90,000 BTU Pool Heat Pump provides efficient, quiet heating for inground swimming pools while helping extend your swimming season. Its low ambient operation allows the unit to continue heating in outdoor temperatures as low as 40°F (4.4°C), making it particularly useful for cooler climates and shoulder-season pool heating.

Designed for long-lasting performance, the HP21004TC features a titanium heat exchanger for excellent heat transfer and resistance to corrosion. Hayward's corrosion-resistant evaporator design, durable body construction and quiet operation make the HeatPro a dependable choice for residential pool heating.

With a 90,000 BTU heating capacity, 230V power supply and compact footprint, the HP21004TC delivers an efficient alternative to traditional gas pool heaters while maintaining comfortable water temperatures throughout more of the swimming season.

Key Features

• 90,000 BTU heating capacity
• Low ambient operation down to 40°F (4.4°C)
• Energy-efficient operation with 5.7 COP
• Titanium heat exchanger for excellent corrosion resistance
• Quiet operation for residential pool environments
• Durable, corrosion-resistant construction
• Compact footprint for easier installation and servicing
• 230V / 60Hz / single-phase electrical supply
• Recommended 30–75 GPM water flow
• 2" x 2-1/2" union connections
• Ideal for extending the swimming season in cooler climates

Specifications

Hayward's published specifications confirm the 90,000 BTU rating, 40A circuit protection, dimensions and 230V electrical requirements.

Frequently Asked Questions

How many BTUs is the Hayward HP21004TC?

The HP21004TC is rated at 90,000 BTU under standard 80°F air / 80°F water / 80% relative humidity test conditions.

What does the TC mean on the HP21004TC?

The HP21004TC is the low ambient version of Hayward's 90,000 BTU HeatPro, allowing heating operation at outdoor temperatures down to approximately 40°F (4.4°C).

Is the HP21004TC suitable for Canadian pools?

Its low-ambient capability makes it particularly useful in cooler climates where pool owners want to start swimming earlier in spring or continue later into fall.

What voltage does the HP21004TC require?

The HP21004TC operates on 230V, 60Hz, single-phase power with a recommended 40A circuit protection size.

Does the HP21004TC have a titanium heat exchanger?

Yes. The HeatPro uses a titanium heat exchanger, providing strong corrosion resistance and reliable heat transfer for pool applications.