VARMINPOOL 18450 BTU Heat Pump Above Ground Pool Heater Review: Uses Pure Titanium for the Heat Exchanger

What the VARMINPOOL Heat Pump Is, and Who For

VARMINPOOL 18450 BTU Heat Pump heats up to 6,000 Gallons, making it suitable for owners of small to medium-sized above ground pools.

A consistent water temperature allows you to enjoy your pool even during cooler months without the high costs of gas heating. The VARMINPOOL 18450 BTU 110V Pool Heat Pump achieves this by providing enough power to heat a 5,000 gallon pool to 80 degrees.

This unit operates on a standard 110-120V household outlet, which simplifies the power requirements for your backyard setup. It includes a remote control and a timer function to automate your heating schedule.

We selected this product from 81 above ground pool heaters for a full review because it is one of the most-rated products that passed our screening. Our comparison is based on a research-based analysis of the listings we evaluated.

For a more powerful heating solution, see the FibroPool FH270 performance breakdown.

The Short Answer on the VARMINPOOL Heat Pump

Best for: you need to heat a backyard pool of up to 6,000 gallons using a standard household outlet.

The VARMINPOOL Heat Pump is a practical choice at the $599.99 price point.

• Pro: Pure titanium heat exchanger resists corrosion from chemicals and salt.
• Pro: WiFi control allows for remote temperature management.
• Pro: 18,450 BTU capacity provides enough heat for a 3,000 gallon pool in a day.
• Con: The 16,000 BTU heating capacity is below the 18,000 BTU requirement for standard 5,000 gallon pools.
• Con: It lacks the power to heat a large 20,000 gallon pool.

Don’t buy this if: you need to maintain a 5,000 gallon pool, as the heating capacity falls short of the 18,000 BTU benchmark required for that volume.

Price assessment: The $599.99 price is low for a unit featuring a titanium heat exchanger and WiFi connectivity.

The Numbers on the Spec Sheet

The 16,000 BTU Heating Capacity measures the total amount of heat energy produced per hour.

Before You Buy: Backyard Pool Heater Checklist

The first thing to check is whether your pool’s total volume stays within the 6,000 gallon limit to avoid under-sizing for gallon volume, which causes the heater to run constantly without reaching the target temperature, leading to high electricity bills and equipment burnout.

• ✅ Confirm your pool is 110-120V compatible — using a 220V unit on a 110V circuit results in a blown breaker or a non-functional unit.
• ✅ Measure your pool’s gallon volume — a volume over 6,000 gallons will result in the heater running constantly without reaching the target temperature.
• ✅ Check your water flow rate (GPM) — insufficient water turnover causes the heat exchanger to overheat and trigger a thermal safety shutdown.
• ✅ Verify your pool chemistry — this unit is compatible with both saltwater and chlorine pools.
• ✅ Budget for the 110-120V power supply — ensure you have a standard household outlet to avoid the cost of a 220V electrical upgrade.

You should not buy this product if you need to heat a large 20,000 gallon pool, as the 16,000 BTU heating capacity is not enough for that volume.

Practical performance results for this Above Ground Pool Heater

How a pure titanium heat exchanger resists pool chemicals

The VARMINPOOL Heat Pump uses a pure titanium heat exchanger, a material that resists the corrosive chemicals found in both saltwater and chlorine environments. This material choice allows you to maintain the unit’s internal components against chemical degradation over time without the metal pitting or breaking down. Since 54 of the 81 screened listings state they use titanium, this is a standard feature for durability in this category.

Because the heat exchanger is made of titanium, you can use this unit in a variety of pool types, including inflatable and steel frame pools, without worrying about the hardware corroding from the water chemistry. If you choose a model without this material, the heat exchanger may degrade faster in chemically treated water, potentially leading to a costly repair or replacement of the internal heating core.

Using a standard 110V household outlet for this pool warmer

The VARMINPOOL Heat Pump operates on a 110-120V power supply, which means you can plug it into a standard household outlet rather than requiring a dedicated 220V circuit. This compatibility simplifies your setup and allows for easier placement near existing power sources. It is important to confirm your outlet provides the correct voltage before purchase, as attempting to run a 220V unit on a 110V circuit will result in a blown breaker or a non-functional unit.

This 110V requirement makes the unit suitable for home use where installing a heavy-duty electrical line is not feasible. While this allows for easier placement, the 5KW power output is tied to this specific voltage, meaning the unit is designed to provide a steady flow of heat to your pool while staying within the limits of standard home wiring.

Rapid Under 30 Minute Installation

The VARMINPOOL Heat Pump is designed for an installation time of under 30 minutes, making it a fast setup for backyard pool heaters. This speed is supported by the fact that it uses a standard 110-120V plug and a remote control, minimizing the need for complex wiring or configuration. Because the installation is a job for a qualified installer wherever local rules require one, you should confirm your local requirements before ordering.

The VARMINPOOL Heat Pump can heat a 3,000 gallon pool in a single day because it provides 16,000 BTU of heating capacity. It is also capable of heating a 5,000 gallon pool to 80 degrees since it supports a maximum volume of 6,000 gallons. However, you should note that this unit does not provide enough capacity to heat a large 20,000 gallon pool, as that would require at least 40,000 BTU.

Common Buyer Jobs Checked Against the VARMINPOOL Heat Pump’s Specs

The VARMINPOOL Heat Pump against the jobs buyers ask about, worked out from its listed heating capacity and maximum gallon volume and a typical need for each job.

Where the VARMINPOOL Heat Pump Sits Among the Alternatives

The VARMINPOOL Heat Pump offers a 6,000-gallon capacity, which is a higher volume than the 5,000-gallon capacity of the KSPF-005L3R1A1 16000BTU Above Ground Pool Heat Pump.

• The VARMINPOOL Pool Heater 110V matches this product at the $599.99 price point.
• The Above Ground Pool Heater PLC is $0.99 cheaper at $599.
• The Elejourney Pool Heat Pump 18,000 BTU offers a larger 6,500-gallon capacity and 18,000 BTU of heating capacity.
• The Della Omi Spark 21,000 BTU Inverter Pool Heat Pump provides 21,000 BTU of heating capacity, which is 5,000 BTU more than this model.
• The KSPF-005L3R1A1 16000BTU Above Ground Pool Heat Pump is $20 more expensive than this unit.
• This model ranks 3rd highest-rated of the 6 options compared, with a 4.4 average from 134 ratings.

If you require a higher heating capacity for a larger volume, the Della Omi Spark 21,000 BTU Inverter Pool Heat Pump is the alternative to consider.

The VARMINPOOL KSPF-005L3R1A2 18450BTU Above Ground Pool Heater is available for $540, which is $60 less than this model.

You might also consider reading our full review of the MICOE Pool Heater.

What It Takes to Run the VARMINPOOL Heat Pump

Setting Up the VARMINPOOL Heat Pump

You must have a 110-120V household outlet available to power the unit before beginning the setup.

1. Unpack the VARMINPOOL Heat Pump and locate the remote control included in the box.
2. Connect the unit to your pool’s circulation lines using PVC plumbing fittings that match your existing pipe diameter.
3. Verify that your pool pump provides enough water flow to move through the heater without triggering a thermal shutdown.
4. Plug the unit into a 110-120V outlet protected by an electrical breaker to prevent circuit overloads.

Verifying warranty coverage and return policies for this pool heater

Warranty coverage and return policies vary by seller and country, so you must confirm the specific terms for your region immediately upon purchase.

• Confirm the specific return window and any required registration steps to ensure you can return the unit if it fails to reach your target temperature.
• Verify the electrical requirements of your home’s circuit to ensure it can handle the 5KW power draw without tripping the breaker.
• Check the specific flow rate requirements for your pool size to ensure the heat exchanger does not overheat during operation.

Turn the unit on and run it for 30 minutes to confirm it successfully heats the water before you finalize the installation.

Questions Buyers Ask About This Above Ground Pool Heater

Will the VARMINPOOL 18450 BTU 110V Pool Heat Pump heat my pool?

Yes, the VARMINPOOL Heat Pump can heat a 3,000 gallon pool in a single day because it provides 16,000 BTU of heat output. This capacity is sufficient for smaller setups but means you should not expect it to heat a large 20,000 gallon pool effectively.

Can I use the VARMINPOOL 18450 BTU 110V Pool Heat Pump for a 5,000 gallon pool?

Yes, the VARMINPOOL Heat Pump supports a 5,000 gallon pool to 80 degrees because it is rated for a maximum gallon volume of 6,000 gallons. Since your pool falls under this limit, the unit has enough capacity to reach your target temperature.

Is the VARMINPOOL 18450 BTU 110V Pool Heat Pump compatible with saltwater?

Yes, the VARMINPOOL Heat Pump is compatible with both saltwater and chlorine pools. This allows you to maintain your current chemical balance while using the unit to regulate water temperature.

Does the VARMINPOOL 18450 BTU 110V Pool Heat Pump have WiFi controls?

Yes, the VARMINPOOL Heat Pump includes WiFi control for remote operation. This feature lets you manage the heating schedule from your phone rather than needing to be near the unit.

Is the VARMINPOOL Heat Pump Right for You?

Who the VARMINPOOL Heat Pump suits and the jobs it is the wrong choice for, listed below with the reason for each.

Where to Buy This Outdoor Pool Warmer

In November 2026 the VARMINPOOL Heat Pump was listed at $599.99. Prices move, so read that as a snapshot, not a quote.

Above ground pool heaters are sold by the retailers below – we do not track which of them has the VARMINPOOL Heat Pump in stock, so check availability and the current price with the retailer before making a trip.

• Amazon (online only) — broad selection of brands and consumer reviews
• Home Depot (online and physical stores) — physical locations for viewing and in-store pickup
• Lowe’s (online and physical stores) — large inventory of residential pool heating equipment
• PoolSupplyStore (online only) — specialist retailer with technical expertise
• eBay (online only) — source for open-box and refurbished units
• Costco (online and physical stores) — bulk purchasing and membership-based pricing

Final Verdict on the VARMINPOOL Heat Pump

If you need to heat a 3,000 gallon pool in a single day, the VARMINPOOL Heat Pump provides enough power with its 16,000 BTU capacity. This backyard pool heater handles smaller volumes effectively, and will it heat a 2,000 gallon pool? The 16,000 BTU output provides more than enough power for that size. You should confirm your pool’s specific gallon volume before ordering, as this unit is not rated for larger capacities like 20,000 gallons.

The VARMINPOOL Heat Pump uses a pure titanium heat exchanger, a material used by 54 of the 81 listings we compared to resist corrosion in pool water. It includes WiFi control and a timer function, features found in 36 and 27 of the other above ground pool heater options we evaluated, respectively. The unit operates on a 110-120V power supply, which allows it to run on standard household outlets.

You should choose the VARMINPOOL Heat Pump if you need to heat a small to medium-sized backyard pool using a standard household outlet. It is available for around $599.99.

The 4.4 rating from 134 buyer ratings provides a consistent signal of user satisfaction for this 18,450 BTU unit.

Skip it if: You need to heat a large pool exceeding 6,000 gallons or require a heating capacity above 16,000 BTU.