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Pool Heater-Chiller Units

A pool heater chiller heats your pool in spring and fall and cools it in summer, all from one unit. Every product in this collection includes both modes with no add-ons required. The main decisions are pool size, budget, and whether you want an inverter compressor for lower running costs and quieter operation.

Shop pool heater chillers below

Inverter vs. Standard Compressor

Standard compressors run at full power or off. They cost less upfront and are simple and reliable. Inverter compressors modulate speed to match demand, which means lower electricity bills, quieter operation, and less wear on the unit. In warm climates where the pump runs most of the year, an inverter pays back its price premium within one to two seasons.

If you plan to use your pool regularly, an inverter is almost always the better long-term value. A standard compressor makes sense if budget is the primary constraint and the pool sees lighter use.

How to Size a Pool Heater Chiller

Pool heat pumps are rated in BTU. More BTU means faster heating and stronger cold-weather output. General sizing guidance for a moderate US climate:

  • Up to 10,000 gallons: 30,000 to 55,000 BTU
  • 10,000 to 20,000 gallons: 55,000 to 95,000 BTU
  • 20,000 to 30,000 gallons: 95,000 to 125,000 BTU
  • Over 30,000 gallons: 125,000+ BTU

Cold-climate buyers in the Northeast, Midwest, or Pacific Northwest should size up one tier. Pools with a cover can often size down, since a good cover can cut heating requirements by 50% or more.

COP is the efficiency number that matters. COP (Coefficient of Performance) tells you how many units of heat you get per unit of electricity. A COP of 10 means you get $10 of heating for $1 of electricity. Modern inverter heat pumps reach COP values of 10 to 15 at partial load. Higher COP means lower monthly bills.

110V vs. 240V

Smaller pool heat pumps under 35,000 BTU are available in 110V and plug into any standard outdoor outlet. Most mid-size and large units require a dedicated 240V circuit. If you don't have one at your equipment pad, budget $300 to $800 for a licensed electrician before ordering.

Operating Temperature Range

Standard heat pumps may shut off below 45 to 50 degrees F. Premium inverter models in this collection operate down to 14 degrees F, making them practical for shoulder-season swimming in cold climates. If you want to swim in October or start earlier in March, check the minimum operating air temperature in the spec sheet before buying.

Warranty Info: What to Look For

Coverage varies significantly across brands. The strongest warranties in this collection include a 25-year heat exchanger warranty, a 10-year compressor warranty, and 5 years of parts and labor. A unit with that coverage costs more upfront but typically has a lower total cost of ownership over 10 years compared to a cheaper unit that needs repairs or replacement at year five or six.

Shopping heat-only? Units in the Pool Heat Pumps collection cost less upfront, but many are heat-only and won't cool. If there's any chance you'll want cooling, the heater-chiller is almost always the better purchase.

Pool Heater Chiller FAQs

What is a pool heater chiller?

A pool heater chiller is a single unit that heats and cools your pool water. In heating mode it extracts warmth from the air and transfers it to the pool. In cooling mode it removes heat from the water and releases it outside. Every product in this collection works in both modes. If you only need heating, you can run it in heat mode only.

How much does it cost to run a pool heater chiller?

Running cost depends on the unit's COP, your local electricity rate, and how often it runs. A modern inverter unit might cost $30 to $80 per month in active use. Standard non-inverter units typically cost 30 to 50% more to run for equivalent output because they can't modulate speed.

How long does it take to heat or cool a pool?

Under good conditions, a properly sized heat pump will raise a 20,000-gallon pool about 1 degree F per hour. Cooling is generally slower because the unit is working against the sun and ambient heat. A pool cover significantly speeds up both heating and cooling by reducing heat loss and solar gain.

What temperature can a pool chiller reach?

Most pool heater chillers can cool water to a practical minimum of about 60 to 65 degrees F. For most swimmers the goal is simply keeping water below 85 degrees F on hot days, which these units handle easily. For sustained low temperatures for competitive training or cold plunge use, contact us for a specific recommendation.

Is a pool heater chiller worth it compared to a heat-only unit?

In most climates, yes. The price difference between a heat/cool unit and a comparable heat-only model is typically $300 to $800. If your pool ever exceeds 85 degrees F in summer, that premium pays back quickly in comfort. Overheated water also accelerates chemical consumption and algae growth, so cooling saves money on chemicals too.

Do I need an electrician to install a pool heater chiller?

If you don't already have a 240V circuit at your equipment pad, yes. Most installations also use a pool service company or plumber for the water connections. Installation typically takes 2 to 4 hours once the unit is on site. Contact us if you have questions about what to expect.

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