Raypak’s smallest inverter heat pump, for above-ground or small in-ground pools where low noise and heat-and-chill matter.
Raypak
A compact heat-and-cool unit for an above-ground or small pool from a big-name maker, best bought through a dealer to get the longer warranty.
- 47,000 BTUOutput (80 °F air)
- 6COP (80 °F air)
- 28,500 BTUOutput (50 °F air)
- Single speedCompressor
- 40 °FRuns down to
- 2 yr compressorWarranty
Price checked October 26, 2026. As an Amazon Associate we earn from qualifying purchases.
- Runs on a 35 A, 230 V circuit, so it suits an above-ground pool pad
- Can also cool the water in summer
- Active defrost and a 40 °F operating floor stretch the season
- Keeps about 60% of its output in 50 °F air
- Short warranty: 2 years parts from a dealer, 1 year parts only when bought online
- No Wi-Fi, app or automation link
The Hayward HeatPro Side Air family
Every Hayward HeatPro Side Air model we rank, smallest first. Ratings compare each against its own pool size.
| Model | Output (80 °F air) | Rating | Price |
|---|---|---|---|
| Hayward HeatPro 50,000 BTU (this one) | 47,000 BTU | 2.8/5 | $2,999 |
| Hayward HeatPro 70,000 BTU | 70,000 BTU | 2.8/5 | - |
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its pool size. How we rank explains each one.
Specifications
| Model number | HP50HA2 |
|---|---|
| Heating ratings | |
| Output, 80 °F air / 80% RH / 80 °F water | 47,000 BTU |
| COP, 80 °F air | 6 |
| Output, 50 °F air / 63% RH / 80 °F water | 28,500 BTU |
| COP, 50 °F air | 4 |
| Output kept at 50 °F | 61% |
| AHRI certified | Yes |
| Compressor | Single speed |
| Lowest operating air temperature | 40 °F |
| Defrost | Yes |
| Heat and cool | Yes |
| Installation | |
| Power | 230 V, 35 A breaker |
| Water flow | 16 to 25 gpm |
| Heat exchanger | titanium |
| Refrigerant | R-410A |
| Size (W × D × H) | 44.5 × 17.9 × 25.6 in |
| Weight | 152 lb |
| Features | |
| Wi-Fi | No |
| Warranty and models | |
| Warranty | 2 yr compressor, 2 yr parts, 1 yr labor, 5 yr heat exchanger |
| Warranty terms | Expert Line above-ground heat pumps (2026 terms): 2 years parts (compressor included), 1 year field labor (3 years parts from a Hayward Rewards partner), titanium tube 5 years. The online W3 (Open Line) version is 1 year parts only, no labor. |
| Also sold as | Hayward W3HP50HA2 (Open Line, sold online) |
Alternatives in this pool size
A plug-in heater for small above-ground pools up to about 6,000 gallons, for owners who swim in the warm months and don’t want to wire a 240 V circuit.
Amazon $549.99A side-discharge heat-and-cool unit for above-ground or small in-ground pools, best for owners who already run a Hayward Omni system.
HaywardCompare
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