AQUASTRONG HEX018 Review: Budget Heat Pump for Above-Ground Pools
- AboveGroundSplash
- May 19
- 6 min read
The AQUASTRONG HEX018 is a compact 18,000 BTU pool heat pump designed for small above-ground pools up to around 6,500 gallons. It is best for pool owners who want an affordable way to extend the swim season without paying for a larger premium heat pump.
Its biggest strengths are the 120V plug-in design, budget-friendly price, quiet operation, titanium heat exchanger, and efficient heat-pump performance. The trade-off is speed: because this is a smaller 18,000 BTU unit, it works best for gradual temperature maintenance rather than fast heating in large pools.
If you have a small to mid-size above-ground pool and you use a solar cover, the HEX018 can be a sensible budget heat pump. If your pool is larger, exposed to cold nights, or you want faster heat recovery, step up to a larger model such as the Aquastrong 35,000 BTU or 55,000 BTU heat pump.
AQUASTRONG HEX018 quick verdict
The AQUASTRONG HEX018 is best for small above-ground pools where price, simple setup, and efficient temperature maintenance matter more than fast heat-up speed.
Best for: Small above-ground pools up to around 6,500 gallons
Main strength: Budget-friendly heat-pump heating with 120V plug-in convenience
Best pairing: A solar cover or insulated pool cover
Main limitation: Slow heat recovery compared with larger 35,000+ BTU heat pumps
Avoid if: You have a large pool, want rapid heating, or need strong cold-weather performance
For many small above-ground pool owners, the HEX018 makes sense as a season-extending heat pump rather than a powerful rapid heater.
Why we’re recommending the AQUASTRONG HEX018 as the Best Budget Heat Pump
Above-ground pool owners usually want three things: affordable upfront cost, low running cost, and easy installation. The AQUASTRONG HEX018 hits that sweet spot:
Budget friendly — priced well below higher-end heat pumps while still offering the core features (timed controls, digital thermostat, titanium exchanger).
Right size for small/medium above-ground pools — marketed for pools up to 6,500 gallons, which matches common above-ground sizes.
High efficiency (good COP) — reported COP around 5.5 under favorable conditions, meaning it delivers ~5.5x the heat energy per unit of electrical energy used in ideal conditions. That keeps operating costs low for a budget pump.
Quiet operation & dual-mode comfort — low operating noise (manufacturer/third-party specs list ~38 dB) and both heating and cooling modes on some listings — handy if you want year-round pool comfort!
Quick specs at a glance:
Who this heat pump is ideal for:
Owners of above-ground pools ≤6,500 gallons (e.g., 12–18 ft round or many medium rectangular models).
Budget-conscious buyers who want a heat pump (low running cost) without premium brand pricing.
DIY installers with basic electrical skills or those who can hire a straightforward single-phase electrician — this unit runs on 120V (comes with 115V GFCI waterproof plug), simplifying installs for many homeowners.
How the HEX018 performs in the real world
Heat-up & recovery
An 18,000 BTU unit won’t make your pool tropical overnight, but for typical above-ground pools it gives usable temperature recovery — raising the temp a few degrees per day depending on weather, pool cover use, and pump run time. Pairing it with a solar cover drastically improves results and reduces run time.
Efficiency & operating cost
With a COP around 5.5, the HEX018 can be significantly cheaper to operate than electric resistance heaters and more cost-effective than gas for steady maintenance heating. Actual COP will vary by ambient air temperature — colder air means lower COP and slower heating.
Noise & footprint
This model is compact and runs quietly (~38 dB reported), so it’s suitable for small equipment pads close to the house — helpful for backyard setups with limited space.
AQUASTRONG HEX018 vs larger Aquastrong heat pumps
The AQUASTRONG HEX018 is the budget choice, but it is not the right size for every pool. The main question is not whether it works — it is whether it has enough BTU power for your pool size, climate, and heating expectations.
Choose the AQUASTRONG HEX018 if you have a smaller above-ground pool, want a lower upfront cost, and are happy with gradual heating over time.
Choose the Aquastrong 35,000 BTU inverter heat pump if your pool is closer to the upper end of the HEX018’s range, you want stronger heating performance, or you want better efficiency from an inverter-style model.
Choose the Aquastrong 55,000 BTU inverter heat pump if you have a larger above-ground pool, want faster heat recovery, or plan to heat the pool more often throughout the season.
Installation notes & above-ground pool tips:
Plumbing: Install on the return line after the filter (standard for heat pumps). Use unions and isolation valves so the unit can be serviced without draining the pool.
Flow rate: Confirm your pump produces sufficient flow (HEX018 specs recommends a minimum flow rate of 530 GPH). Too little flow reduces heat transfer and can cause the unit to underperform or fault; too much flow can increase head pressure and may stress plumbing/fittings.
Power: The HEX018 listing shows 120V operation — confirm your circuit and breaker sizing before purchase and hire an electrician if unsure!
Placement: Allow clear airflow around the unit (obey manufacturer clearances). Avoid placing it where exhaust air will blow directly onto lounge areas or delicate plants.
Use a solar cover: A solar or insulated cover reduces heat loss at night and improves heat-pump effectiveness substantially — often the single best complement to a budget heat pump!
Pros & Cons
Pros
Low upfront cost compared with premium brands.
Compact and relatively quiet — fits tight backyard pads.
Good efficiency (COP ~5.5) under favorable conditions.
Titanium heat exchanger — durable and pool-safe.
Cons
Not as fast as high-BTU commercial heat pumps or gas heaters for very large temperature rises.
COP and performance drop in cold weather; heating speed will depend on ambient air temps.
Some buyers prefer established brand support — AQUASTRONG is a budget brand, so parts/service networks may be less extensive than major manufacturers.
FAQ
What pool size is the AQUASTRONG HEX018 best for?
The AQUASTRONG HEX018 is best for small above-ground pools up to around 6,500 gallons. It is not designed for large pools or fast heat recovery, so it works best when used for gradual heating and temperature maintenance.
Is the AQUASTRONG HEX018 good for above-ground pools?
Yes, the AQUASTRONG HEX018 can be a good choice for small above-ground pools. Its 18,000 BTU heating capacity, compact size, and plug-in style setup make it suitable for pool owners who want an affordable way to extend the swim season.
How fast will the AQUASTRONG HEX018 heat a pool?
The AQUASTRONG HEX018 heats gradually rather than quickly. Heating speed depends on pool size, starting water temperature, outdoor air temperature, wind exposure, and whether you use a solar cover. For best results, use it to maintain warmth rather than expecting rapid heating.
Does the AQUASTRONG HEX018 need a solar cover?
The AQUASTRONG HEX018 does not require a solar cover, but using one is strongly recommended. A solar cover helps reduce overnight heat loss, improves heating efficiency, and makes a small heat pump more effective in an above-ground pool.
Can the AQUASTRONG HEX018 run on 120V?
The AQUASTRONG HEX018 is commonly listed as a 120V or 115V plug-in pool heat pump, depending on the listing version. Always check the current product listing and installation requirements before buying to make sure it matches your electrical setup.
Is the AQUASTRONG HEX018 better than a gas pool heater?
The AQUASTRONG HEX018 is usually better for small above-ground pool owners who want lower running costs and gradual heating. A gas pool heater is better if you need faster heat-up times, stronger cold-weather performance, or heating for a much larger pool.
Should I buy the HEX018 or a larger Aquastrong heat pump?
Choose the AQUASTRONG HEX018 if you have a small above-ground pool and want a lower-cost heat pump for gradual heating. Choose a larger Aquastrong 35,000 BTU or 55,000 BTU model if your pool is bigger, loses heat quickly, or you want faster temperature recovery.
Final verdict: should you buy the AQUASTRONG HEX018?
The AQUASTRONG HEX018 is a smart budget heat pump for small above-ground pools where gradual heating, low running cost, and simple setup matter more than fast heat recovery.
It is best for pool owners with pools up to around 6,500 gallons who want to extend the swim season without buying a larger, more expensive heat pump. To get the best results, pair it with a solar cover, run it during warmer parts of the day, and keep expectations realistic: this is a small 18,000 BTU heat pump, not a rapid heater for large pools.
Choose the HEX018 if you want an affordable heat pump for a smaller above-ground pool.
Choose a larger Aquastrong 35,000 BTU or 55,000 BTU model if your pool is bigger, colder, or needs faster temperature recovery.
For larger pools or faster heat recovery, step up to a higher-BTU or inverter models such as the:
Click a model above to read the full review.
Read next
Want to compare budget picks vs premium heat pumps and learn which solar cover will cut your runtime by half? Head back to the Heat Pumps & Solar Covers hub to compare models, costs, and installation tips for above-ground pools.
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