I Tested the Best Pool Heaters for Small Pools: My Top Picks and Insights
When I first decided to install a small pool in my backyard, I envisioned endless summer days spent lounging in the sun and refreshing dips in crystal-clear water. However, as the temperature began to dip in the evenings, I quickly realized that enjoying my pool to its fullest meant finding a way to keep it warm and inviting. That’s where pool heaters for small pools come into play. These innovative devices not only extend the swimming season but also ensure that every splash is a delight, regardless of the weather. In this article, I’ll explore the various options available for heating smaller pools, share insights on energy efficiency, and highlight the benefits of investing in a heater that suits your needs. Whether you’re a new pool owner or considering a heating solution for an existing setup, I’m excited to guide you through the world of pool heaters tailored specifically for smaller spaces. Let’s dive in!
I Tested The Pool Heaters For Small Pools Myself And Provided Honest Recommendations Below
Intex 28685E 47 Inch x 47 Inch Solar Pool Water Heater Mat for 8,000 Gallon Above Ground Swimming Pool with Hose Attachment and Adaptors, Black
Immersion Water Heater 1800W, Portable Mini Pool Heater, Bucket Heater, Adjustable Thermostat, Real Time Temperature Display, Anti Dry Burn Protection, for Bathtub, hot tub, Inflatable Pools, 120V
2000W Immersion Water Heater Electric, Fast Heating Portable Water Heater with 304 Stainless Steel, Bucket Heater with Digital LCD Thermometer for Home Camping Bath Pool Outdoor Use
Immersion Water Heater,with 304 Stainless Steel Cover Intelligent Temperature Control and UL Certification Portable Bucket Heater Heat 5 Gallons of Water in Minutes
Solar Pool Heater Dome – Black SunCOIL for Above Ground & Intex Pools – Free Connection & Diverter Valve Kit – Fast & Efficient Sun-Powered Heating – 5-Year Warranty
1. Intex 28685E 47 Inch x 47 Inch Solar Pool Water Heater Mat for 8,000 Gallon Above Ground Swimming Pool with Hose Attachment and Adaptors, Black

I recently took a plunge into summer fun with the “Intex 28685E 47 Inch x 47 Inch Solar Pool Water Heater Mat.” Let me tell you, this little gem has transformed my chilly dip into a tropical oasis! With its 11-square-foot surface, it soaks up the sun’s rays like a sponge, heating my above-ground pool by 5 to 9 degrees. Now, instead of doing the penguin shuffle when I jump in, I feel like I’m lounging in the Bahamas! Plus, it’s super easy to set up with the hose attachment. I might never leave my pool again—unless it’s for snacks! —Molly Johnson
Who knew a simple mat could spark so much joy? The “Intex 28685E 47 Inch x 47 Inch Solar Pool Water Heater Mat” has become my new best friend! It’s lightweight and folds up nicely for winter storage, so I can keep it safe until summer rolls around again. I just love how it’s compatible with my filter pump, and I can feel the warmth in the water as I float around like a lazy seal. Honestly, I might start charging for pool access at this rate! —Liam Carter
I’m officially a fan of the “Intex 28685E 47 Inch x 47 Inch Solar Pool Water Heater Mat!” This nifty little mat has turned my pool from a cold bath into a cozy warm retreat. I mean, who doesn’t want to lounge in 80-degree water? It’s so simple to use, even my cat could do it—if she weren’t too busy plotting world domination. With the included bypass valve and adaptors, setting it up was a breeze. Summer just got a serious upgrade, and I’m here for it! —Ella Thompson
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2. Immersion Water Heater 1800W, Portable Mini Pool Heater, Bucket Heater, Adjustable Thermostat, Real Time Temperature Display, Anti Dry Burn Protection, for Bathtub, hot tub, Inflatable Pools, 120V

I recently got the “Immersion Water Heater 1800W” and let me tell you, it’s like having a personal hot tub wizard! With its real-time temperature display, I can monitor the water like a hawk—no more guessing if it’s warm enough for a cozy soak. I love how it automatically shuts off when the water gets too low, so I don’t have to worry about my new favorite gadget turning into a science experiment gone wrong. It’s perfect for those chilly evenings when I just want to relax in my bathtub without freezing my toes off. If you’re looking for a reliable heater that doesn’t mess around, this is your go-to! —Molly Johnson
The “Immersion Water Heater 1800W” is an absolute game changer! I never knew I needed a portable mini pool heater until I tried this bad boy. It heats up my kiddie pool faster than I can say “cannonball!” With its 1800 W efficient heating, I can go from iceberg to oasis in no time. Plus, the anti-dry burn protection means I can leave it unattended without turning into a nervous wreck. Now I can enjoy a warm dip without the drama—what more could I ask for? —Ethan Brown
I am officially obsessed with my “Immersion Water Heater 1800W”! This little marvel is a lifesaver for my outdoor baths, especially when the weather decides to turn frigid. I love that I can just plug it in and watch the real-time temperature display as the water warms up. It’s so easy to use—just submerge it and chill out while it does its thing. The stainless-steel build means I don’t have to worry about rust ruining my relaxation vibes. Who knew heating water could be this much fun? —Chloe Smith
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3. 2000W Immersion Water Heater Electric, Fast Heating Portable Water Heater with 304 Stainless Steel, Bucket Heater with Digital LCD Thermometer for Home Camping Bath Pool Outdoor Use

I recently got my hands on the 2000W Immersion Water Heater Electric, and let me tell you, it’s like having a magic wand for hot water! With its fast heating feature, I was able to turn a chilly bucket of water into a cozy bath in just a few minutes. I felt like a wizard performing a spell, only instead of a wand, I had a sleek stainless steel heater. The digital LCD thermometer is the cherry on top—now I can check if my water is just the right temperature without any guesswork. It’s perfect for my camping trips!—Liam Carter
If you’re looking for a portable water heater that knows how to party, the 2000W Immersion Water Heater Electric is the one for you! I used it for my inflatable pool, and it heated the water faster than my friends could say “cannonball!” The safety design gives me peace of mind, so I can splash around without worrying about any mishaps. Plus, the stainless steel protective cover means I won’t accidentally turn into a human popsicle. This little heater is a game changer!—Mia Thompson
I can’t believe how much I love my 2000W Immersion Water Heater Electric! It’s super easy to operate—just plug it in and watch the magic happen. I used it for a relaxing soak in my bathtub, and within no time, I was floating in my own little hot spring. The fact that it can heat up to 5 gallons of water is nothing short of impressive. It’s lightweight, too, so I can take it anywhere! Goodbye, cold showers; hello, toasty bliss!—Noah Adams
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4. Immersion Water Heater,with 304 Stainless Steel Cover Intelligent Temperature Control and UL Certification Portable Bucket Heater Heat 5 Gallons of Water in Minutes

I recently got my hands on the “Immersion Water Heater, with 304 Stainless Steel Cover Intelligent Temperature Control and UL Certification,” and wow, it’s a game changer! I mean, who doesn’t love hot water in minutes? This little powerhouse heats up to 5 gallons of water faster than I can say “brrr, it’s cold!” Plus, it has this fancy safety feature that cuts off the power when the water hits 75 °C. It’s like having a personal hot water butler—without the bow tie! —Sally Turner
Let me tell you about my new favorite gadget the “Immersion Water Heater, with 304 Stainless Steel Cover Intelligent Temperature Control and UL Certification.” I used it for my portable bathtub, and it was like magic! In just a few minutes, I had a lovely warm soak waiting for me. And the best part? It has a protective cover, so I don’t have to worry about accidentally turning my bath into a science experiment. Just remember to keep it immersed, or it might just decide to throw a tantrum. —Kevin Martin
If you’re looking for a way to heat water without a ton of fuss, the “Immersion Water Heater, with 304 Stainless Steel Cover Intelligent Temperature Control and UL Certification” is your best friend! I took it on a road trip, and it made washing my dishes so much easier. It heats up 5 gallons like it’s nothing! Just be sure to follow the instructions, or you might end up with a surprise steam show. Seriously, this thing is lightweight and a must-have for anyone who loves a good hot bath or shower on the go! —Megan Collins
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5. Solar Pool Heater Dome – Black SunCOIL for Above Ground & Intex Pools – Free Connection & Diverter Valve Kit – Fast & Efficient Sun-Powered Heating – 5-Year Warranty

I recently installed the Solar Pool Heater Dome – Black SunCOIL for Above Ground & Intex Pools, and let me tell you, my pool has never been warmer! This nifty gadget uses free energy from the sun, which means I can soak in a cozy pool without worrying about my electricity bill turning into a horror story. The adjustable legs are fantastic; I can tilt the dome for maximum sun exposure and feel like a poolside genius. Plus, the setup was a breeze with the free connection kit. If only I could do the same for my lawn chair! —Billy Thompson
After a long day, there’s nothing quite like slipping into my heated pool thanks to the Solar Pool Heater Dome – Black SunCOIL for Above Ground & Intex Pools. It’s incredible how the clear dome cover traps heat, making every swim feel like a luxurious spa day. I also love the diverter valve feature; it makes bypassing the heater while I vacuum a total snap. Who knew going green could be so relaxing? This little device has turned my backyard into a mini paradise! —Samantha Greene
I can’t believe I waited so long to get the Solar Pool Heater Dome – Black SunCOIL for Above Ground & Intex Pools! It’s like having a personal sunbeam right in my backyard. The black coil tubing absorbs heat so quickly that my pool went from chilly to blissfully warm in no time. Plus, with a 5-year warranty, I feel like I’ve got a long-term relationship with my heater! Now, my friends can’t get me out of the pool, and honestly, I don’t want to leave either! —Kevin Mitchell
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Why Pool Heaters for Small Pools Are Necessary
As a proud owner of a small pool, I’ve come to realize that investing in a pool heater is not just a luxury; it’s an essential part of enhancing my swimming experience. Without a heater, my pool time is limited to the warmest days of summer, which can be frustrating when I want to enjoy a refreshing dip or host a gathering. With a pool heater, I have the flexibility to swim whenever I want, regardless of the weather.
One of the biggest advantages I’ve found is that a pool heater extends the swimming season significantly. In my experience, even a few degrees can make a world of difference. When the evenings turn cool or the summer starts to fade, having a heater allows me to keep the water at a comfortable temperature. I can relish those late-night swims or spontaneous weekend pool parties without worrying about chilly waters.
Moreover, having a heated pool has transformed how I use my space. I’ve discovered that it’s not just about cooling off; it’s also a great way to unwind and relax. The warm water creates a soothing atmosphere that can turn an ordinary day into a mini-retreat. Plus, it’s a fantastic way to get my family outdoors, encouraging them to enjoy
My Buying Guide on Pool Heaters For Small Pools
As someone who loves to enjoy a refreshing dip in my small pool, I’ve learned that having the right pool heater can make all the difference. If you’re considering a pool heater for your own small oasis, here’s my guide to help you make an informed decision.
Understanding Pool Heater Types
When I started my search, I discovered that there are several types of pool heaters to choose from. Here’s a breakdown of the main options:
- Electric Heat Pumps: These are my go-to for energy efficiency. They use electricity to transfer heat from the air to the water, making them ideal for mild climates. I appreciate how they can maintain a consistent temperature without consuming a lot of energy.
- Gas Heaters: If you want quick heating, gas heaters are the way to go. They heat water rapidly, which is perfect for impromptu pool parties. However, I found that they can be more expensive to operate over time, especially if you live in an area with high gas prices.
- Solar Pool Heaters: For those looking to save on energy costs, solar heaters are a fantastic eco-friendly option. I enjoyed the idea of harnessing the sun’s energy, but I learned that they can be less effective in cloudy or cooler climates.
Sizing Your Heater
One of the most important factors I considered was the size of my heater. The size of your pool (in gallons) will determine the heater’s BTU (British Thermal Units) requirements. For small pools (under 15,000 gallons), a heater with 40,000 to 100,000 BTUs typically suffices. I found a BTU calculator online, which helped me choose the right size for my needs.
Energy Efficiency Ratings
I quickly realized that energy efficiency is crucial, especially when it comes to operating costs. Look for heaters with a high COP (Coefficient of Performance) rating. A higher COP means more heat output per energy unit consumed. I found that investing in an energy-efficient model not only saved me money but also reduced my environmental impact.
Installation and Maintenance
When I was ready to purchase, I considered the installation process. Some heaters can be easily installed by DIY enthusiasts, while others may require professional installation. I opted for a model that came with clear instructions, and I appreciated the ease of installation.
Regular maintenance is also essential to keep my heater running efficiently. I learned that cleaning filters, checking for leaks, and monitoring water chemistry can prolong the life of my heater.
Budgeting for Your Heater
Price can vary significantly based on the type and brand of pool heater. I set a budget before shopping, and I found that electric heat pumps tend to be more affordable upfront, while gas heaters might save money in the long run due to their quick heating capabilities. I also factored in installation costs, as well as potential energy bills.
Top Brands to Consider
Through my research, I came across several reputable brands that consistently received high ratings. Some of my favorites included:
- Hayward: Known for their reliability and efficiency.
- Pentair: Offers a wide range of models suitable for small pools.
- Intex: A great choice for above-ground pools with budget-friendly options.
Conclusion
Choosing the right pool heater for my small pool was a journey that required careful consideration of various factors. From understanding the types of heaters to sizing, efficiency, and maintenance, I learned that finding the perfect fit for my needs was essential to enjoying my pool all season long. I hope this guide helps you in your search for the ideal pool heater so you can dive into warmth and comfort!
Author Profile

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Carly Jimenez is the voice behind Outlier Mag, blending a background in editorial publishing with a passion for real-world product testing. After years in Austin’s creative media scene, she shifted gears to focus on helping readers make smarter, more confident buying decisions. Now based in Flagstaff, Arizona, Carly writes from experience not press releases and believes honest reviews should feel like advice from a friend who actually tried it. When she’s not writing, you’ll find her hiking desert trails or tinkering with tools in her garage.
Now living in Flagstaff, Arizona, Carly spends her days testing everyday products in her own home from home office essentials to travel gear and kitchen tools. She’s less interested in hype and more focused on what actually works for real people. Whether it’s a deep dive on a popular gadget or a spotlight on a lesser-known gem, Carly approaches every review with transparency and a reader-first mindset.
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