Discover the Best Pool Chillers to Keep Your Pool Refreshing

Finding the Best Pool Chillers for Your Swimming Pool

Sick of swimming in bathwater? When summer really kicks in, your pool can hit 90°F+ and feel more like a hot tub no one asked for. Pool chillers bring the temperature back to a cool, refreshing range -- and they're more affordable than most people expect.

Best Pool Chillers at a Glance

Why You Need a Pool Chiller: Beating the Heat

When your pool water hits the mid-80s or above, it stops being refreshing. Bacteria and algae thrive, chemicals burn off faster, and nobody wants to get in. A pool chiller brings you back to the 78 to 82 degree sweet spot where swimming is actually enjoyable.

• More swim time -- stay in longer without overheating
• Better water balance -- cooler water slows algae growth, reduces evaporation, and extends chemical life
• Longer pool season -- use your pool all summer instead of avoiding it in peak heat
• Energy savings -- cooler water reduces pump and filter strain

Types of Pool Chillers: Understanding Your Options

There's more than one way to cool a pool. Here are the main types, how they work, and honest pros and cons of each.

Refrigerant-Based Pool Chillers

Best for Most Homeowners

These units work like a reverse air conditioner -- a refrigerant cycle extracts heat from pool water and releases it into the air. They're the most popular choice for residential pools because they work reliably in any climate, including high humidity.

Temp Drop

Up to 15F+

Works in Humidity

Yes

Install

Moderate

Running Cost

Low-Moderate

Pros

• Works in any climate including humid FL summers
• 15F+ temperature drop capability
• Reliable, proven technology

Cons

• Higher purchase price than evaporative
• Requires 240V electrical connection
• Cool-only, no heating

AquaCal TC1000

Up to 12,000 gal -- smaller inground and above-ground pools

AquaCal TC1500 Top Pick

Up to 20,000 gal -- average inground pool, drops 15F+

Shop AquaCal TropiCool Chillers

Evaporative Pool Chillers

Lowest Operating Cost

Evaporative chillers spray pool water into the air where evaporation carries heat away -- the same principle as sweating. They draw very little electricity and cost almost nothing to run, but perform best in dry climates. In high-humidity areas like coastal Florida, effectiveness drops significantly.

Operating Cost

<$0.12/kWh

Amperage

8-12 amps

Best Climate

Low humidity

Install

Simple

Pros

• Extremely low electricity cost to run
• Low amperage -- no heavy electrical work
• Affordable purchase price
• Simple setup and maintenance

Cons

• Loses effectiveness in high humidity (FL, SE coast)
• Adds water back to pool -- affects water chemistry
• Less precise temperature control

Best evaporative pool chiller: Glacier Pool Coolers are market-leading evaporative coolers that work for a wide range of pool sizes and climates. Simple, affordable, and gets the job done. This evaporative cooling unit runs for less than $0.12 per kWh because it draws such minimal electricity.

Shop Glacier Pool Cooler See All Glacier Models

Pool Heater-Chiller Units

Best Year-Round Flexibility

These inverter heat pumps do double duty -- cooling in summer, heating in winter. For year-round pool owners, a single heater-chiller unit eliminates the need for two separate pieces of equipment. They're the most popular choice for homeowners in the Sun Belt who use their pool 10 to 12 months per year.

Heat + Cool

Both

Inverter Tech

Yes

Year-Round

Yes

Best Value

FH235-i

Pros

• One unit handles heating AND cooling
• Inverter technology = lower electricity bills
• Ideal for year-round pool owners

Cons

• Higher upfront cost than a cool-only unit
• Overkill if you only need summer cooling

FibroPool FH235-i Best Value

Up to 15,000 gal -- small to medium pools, year-round use

FibroPool FH285-i

Up to 25,000 gal -- larger pools, year-round use

Shop FibroPool FH235-i All Heater-Chiller Units

Madimack Inverter Heat Pumps -- Cooling Built In Standard

Heat + Cool on Every Model

Most pool heat pumps heat only. Most dedicated chillers cool only. Madimack does both -- and that's not an upgrade or an add-on. Every Madimack heat pump includes cooling as a standard feature at no extra cost.

If you're shopping for a pool chiller and you also have cold months where you'd use a heater, a Madimack heat pump may be the smarter single purchase. You get a high-efficiency full inverter unit (COP up to 15.0) that maintains your ideal pool temperature year-round -- cooling when summer pushes your pool above your set point, heating when the nights get cool.

Peak COP

Up to 15.0

Cooling

Standard

WiFi

Standard

Noise (Elite)

30.8 dB

Madimack InverECO 32K

Up to 7,500 gal -- compact pools, budget-friendly full inverter

Madimack InverECO 66K

Up to 15,000 gal -- most popular entry-level option

Madimack InverELITE 116K Best Overall

Up to 25,000 gal -- 25-year warranty, quietest at 30.8 dB, COP 15.0

Madimack InverTitan 112K

Up to 25,000 gal -- high BTU output for large pools

Worth knowing: Madimack also sells inverter pool pumps, salt generators, filters, and robotic pool cleaners. Browse the full Madimack collection.

Shop Madimack Heat Pumps Full Madimack Collection

Key Factors When Choosing the Best Pool Chiller

Not all chillers perform the same in every situation. Here's what actually matters when picking the right one for your pool:

• Cooling Capacity and Pool Size -- Match the unit's BTU or GPH rating to your pool's gallons. An undersized unit runs constantly without reaching target temp, wasting energy and wearing out faster.
• Climate and Humidity -- High humidity (Florida, Southeast coast)? Go refrigerant. Dry Southwest or inland? Evaporative works great and costs far less to run.
• Heat + Cool vs. Cool Only -- Year-round pool? A heat pump with built-in cooling like Madimack or FibroPool does both jobs in one unit. Summer cooling only? A dedicated chiller is less expensive upfront.
• Energy Efficiency (COP) -- Higher COP means more cooling per dollar of electricity. Over a 10-month Florida season, a high-COP unit can save $500-$1,000 per year versus a basic model.
• Noise Levels -- Check decibel ratings before buying. Inverter units are generally quieter. No one wants a chiller that sounds like a lawnmower running during a backyard cookout.
• Durability and Materials -- Look for titanium heat exchangers, rust-resistant cabinets, and UV-stable components. Coastal and humid environments destroy cheap materials within 3-5 years.
• Temperature Control -- Digital thermostat at minimum. WiFi app control is a real convenience for vacation homes or Airbnb hosts who want to pre-cool before guests arrive.

Installation and Maintenance Tips

• Get help for electrical -- refrigerant units require 240V wiring; always use a licensed electrician for this portion
• Need an installer? NonStopSwim can connect you with a local pro -- see our installation page
• Keep coils clean -- clear leaves and debris monthly; blocked airflow reduces efficiency up to 25%
• Check water chemistry -- maintain proper pH (7.4-7.6) and alkalinity; chillers work harder in unbalanced water
• Winter prep -- if it gets cold where you live, drain the unit and cover it for the off-season to prevent freeze damage
• Inspect connections annually -- check hose fittings, unions, and electrical lines once per season

With the right pool chiller, you can finally enjoy your pool the way it was meant to be -- cool, clean, and comfortable. Whether you're cooling a backyard splash zone or a lap pool, the right unit makes all the difference.