Heat Pump or Gas Heater for Pool

One of the most asked questions when deciding to purchase a heater for a pool or spa is which unit should I purchase, a gas heater or heat pump.

The first step to deciding on which type of heater you need is to ask yourself a few questions.

  1. How many days a week would I keep water heated?
  2. How long each day will you keep the water heated ?
  3. How large is my pool or spa?
  4. How much value do I place on the time it takes to heat my water?
  5. What are the average weather conditions where I live?
  6. What is the cost of electricity vs natural gas/propane per therm where I live?
  7. Do I already have a gas line installed at my home?
  8. Is the electrical service at my home sufficient to install a heat pump?
  9. What type of warranty comes with a gas heater vs heat pump?
  10. How much of an initial investment do I want to make to heat my water?


Once you answer these questions you can make the right decision. Typically if you are only going to spot heat or use very limited heating through out the year a gas heater will be your best option. If you find that you like to keep the water warm most of the year and extend your swim season with reasonable heating cost a heat pump is the best choice. Here are some suggestions.

When to use gas heater:

  • You live in a climate that has an average daily temperature below 55 degrees
  • You are only going to heat your water for very short durations each day such as a 45 minute spa therapy
  • You do not keep your water heated all day every day for the entire swim season
  • You only heat your pool for a week or two a year for guest
  • Your electrical service can not handle the requirements of a heat pump
  • You have a very large residential pool or commericial pool that would benefit from both a gas heater and heat pump


When to use a heat pump:

  • You live in a climate that has an average daily temperature above 55 Degrees
  • You like to keep your water heated seven days per week thoughout the swim season
  • Your electrical service can handle the load of a heat pump
  • You value an environmentally responsible heater the produces no C02 emissions
  • You value the ability to heat you water for 50% to 70% less than gas