Gas vs. Electric Pool Heaters: Which One Is Right for You? (+ Why You Might Need a Chiller)

Heating your pool isn’t just a luxury—it's what turns a few months of swimming into a nearly year-round experience. But if you’re researching how to heat your pool, you’ve likely run into the classic question:

Gas heater or electric heat pump?

Both options can maintain a comfortable swimming temperature, but they differ in performance, cost, efficiency, and ideal conditions. And depending on your climate and usage, you might also want to consider a third piece of equipment many pool owners overlook: a pool chiller.

Below is a helpful comparison to guide your decision.

Gas Pool Heaters

Gas heaters use natural gas or propane to heat water quickly. They’ve been the go-to choice for decades, especially for pools that need fast, on-demand heat.

Pros

• Fastest heating option on the market

• Works well in any climate, including cold environments

• Ideal for pools/spas where rapid temperature rise is needed

• Heats on demand—great for irregular pool use

Cons

• Higher operational costs, especially for propane

• Less energy-efficient compared to electric heat pumps

• Requires gas line installation(can be costly)

• More emissions compared to electric options

• Heater/Chiller combo units not available in gas, only electric

Best For

• Cold-climate regions

• Pool/spa combos

• Owners who want to heat the pool only occasionally

• People who prioritize speed over efficiency

Electric Pool Heaters

Electric heat pumps don’t create heat—they capture it from the surrounding air and transfer it into the pool. This makes them incredibly efficient in the right conditions.

Pros

• Lower operating costs than gas

• Highly energy-efficient, especially in warm climates

• Consistent heating capability

• Longer life span than gas heaters

• Environmentally friendlier

Cons

• Slower heating, especially compared to gas

• Dependent on ambient air temperature(best above ~50°F)

• Higher up front cost than gas

• Not ideal for rapid heating, particularly for spas

Best For

• Warm or moderate climates

• Daily or frequent pool use

• Owners who prioritize energy efficiency

• People looking for lower long-term cost of operation

Don’t Forget Pool Chillers (Cooling Your Pool!)

In Florida, pool owners face a different problem for half the year: water that gets too warm in the summer.

That’s where a pool chiller comes in.

What Is a Chiller?

A pool chiller uses refrigeration technology to cool the water, similar to an air conditioner. Some units both heat and cool, offering full temperature control.

Benefits of a Pool Chiller

• Lowers water temperatureduring hot months

• Keeps your pool arefreshing 78–82°F, even on 100°F days

• Reduces evaporation, which saves water

• Helps maintain water chemistry stability

• Enhances comfort—no more “bathwater pool” in August

Best For

• Hot climates like Florida

• Shallow pools that heat up quickly

• Pool owners who want precise temperature control

Choosing between a gas and electric pool heater comes down to your climate, usage habits, and priorities. It is always wise to speak to a pool professional to help decide what is right for you.