Hayward HeatPro 50K BTU Heat Pump (Heat/Cool)
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✓ Includes Manufacturer Warranty
✓ Installation Available Upon Request
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The W3HP50HA2 is a side-air heat pump that both heats and cools above-ground and in-ground pools on Hayward's HeatPro platform. It delivers 50,000 BTU/hr, uses a titanium heat exchanger built for demanding pool environments, and includes active defrost and cooling capability in a compact 152 lb cabinet. The side-air discharge design and low-profile dimensions make it a practical fit for installations where vertical clearance is limited.
W3HP50HA2 HeatPro Side-Air Heat Pump - Specs and Features
The W3HP50HA2 runs on 208/230V single-phase, 60 Hz power with a 35-amp maximum breaker. It supports a water flow range of 16 to 25 GPM - notably narrower than the larger HeatPro in-ground models, so confirm your circulation system falls within that window before purchasing. The cabinet measures 25.6" H x 17.9" W x 44.5" L and weighs 152 lb. It is well matched for pools up to around 10,000 to 12,000 gallons in warm climates.
W3HP50HA2 Installation and Clearance Requirements
The side-air platform has different clearance requirements than the round and square HeatPro models. The W3HP50HA2 needs 12 inches at the rear, 30 inches on each side, and only 20 inches of vertical clearance - which makes it well suited for installations under decks, overhangs, or in equipment areas with limited overhead space. Confirm the 30-inch side clearance is achievable on your pad before setting the unit, as that is the tightest constraint on most installs. Plumbing connects via 2" x 2-1/2" union connections.
HeatPro Heat and Cool Performance
The W3HP50HA2 pairs a single-speed compressor with a multi-speed ECM fan motor. The ECM fan adjusts speed based on demand, reducing noise during lower-load operation. Active defrost helps the unit manage frost buildup when temperatures drop, extending reliable operation into cooler conditions. The minimum operating temperature is 40°F, but this model does not include low ambient operation - so in regions with sustained temperatures below 40°F, performance will be limited. Cooling capability makes it a practical year-round tool for warm climates where summer water temperatures can climb into uncomfortable ranges.
Titanium Heat Exchanger and Coastal Durability
The W3HP50HA2 uses a titanium heat exchanger, which resists corrosion from salt water and aggressive pool chemistry far better than copper or cupronickel alternatives. For coastal installs, the Ultra Gold corrosion-resistant evaporator fin adds another layer of protection against salt air. That combination makes this unit a durable choice for pools near the ocean where standard-fin competitors tend to degrade faster.
W3HP50HA2 vs. Larger HeatPro Models - Sizing and Platform Differences
The W3HP50HA2 uses a side-air discharge design rather than the top-discharge layout on the round and square HeatPro models. Beyond the cabinet shape, the key practical differences are the flow range (16-25 GPM here vs. 30-75 GPM on larger models) and pool size coverage. This model is sized for smaller pools and above-ground applications. If your pool is larger than 12,000 gallons or your circulation system runs above 25 GPM, step up to the round-platform HeatPro line.
| Specification | Value |
|---|---|
| Brand | Hayward |
| Model / SKU | W3HP50HA2 |
| Series | HeatPro |
| Platform | Side Air |
| Pool Type | Above Ground and In Ground |
| Heating Capacity | 50,000 BTU/hr |
| Kilowatts | 14 kW |
| Cooling Capability | Yes |
| Active Defrost | Yes |
| Low Ambient Operation | No |
| Minimum Operating Temperature | 40 degrees F |
| Compressor Speed | Single-speed |
| Fan Motor Type | Multi-speed ECM |
| Heat Exchanger | Titanium |
| Evaporator Coil | Ultra Gold corrosion-resistant |
| Voltage | 208/230V |
| Phase | Single |
| Frequency | 60 Hz |
| Maximum Breaker Size | 35 Amps |
| Water Flow Rate | 16 to 25 GPM |
| Plumbing Connections | 2" x 2-1/2" union |
| Rear Clearance | 12" |
| Side Clearance | 30" |
| Vertical Clearance | 20" |
| Product Dimensions (H x W x L) | 25.6" x 17.9" x 44.5" |
| Product Weight | 152 lb |
| Shipping Dimensions | 32.6" x 18.8" x 44.9" |
| Shipping Weight | 160 lb |
| Silent Mode | No |
| Boost Mode | No |
| Refrigerant | Yes |
| Channel | Open Line |
| GTIN | 610377415040 |
Frequently Asked Questions
Does this model heat and cool the pool?
Yes. The W3HP50HA2 includes both heating and cooling capability, plus active defrost. In warm climates where pool water can get uncomfortably hot in summer, the cooling function lets you dial the temperature back without draining and refilling.
What size pool can a 50,000 BTU heat pump handle?
At 50,000 BTU/hr, this unit is well matched for pools up to around 10,000 to 12,000 gallons in warm climates. The 16 to 25 GPM flow range also limits it to smaller circulation systems - confirm your pump's flow rate falls within that window before purchasing.
What pools is this unit designed for?
Both above-ground and in-ground pools. The compact side-air cabinet and lower flow requirements make it particularly well suited for above-ground pools and smaller in-ground installations where the larger round-platform HeatPro models would be oversized.
What makes the side-air platform different from other HeatPro models?
The side-air design discharges air from the sides of the unit rather than the top, which requires more horizontal clearance (30 inches per side) but far less vertical clearance (only 20 inches). That makes it a practical option under decks, overhangs, or in tight equipment areas where a standard top-discharge unit would not fit.
Why does the titanium heat exchanger matter?
Titanium resists corrosion from salt water and aggressive pool chemistry better than copper or cupronickel alternatives. For pools with salt systems, high sanitizer levels, or coastal salt air exposure, the material choice has a real long-term impact on heat exchanger durability.
What electrical service does the W3HP50HA2 require?
A dedicated 208/230V single-phase circuit with a 35-amp maximum breaker. Confirm your panel has capacity before purchasing.
Does this model work in cold weather?
The minimum operating temperature is 40°F. Unlike some HeatPro models, the W3HP50HA2 does not include low ambient operation, so its efficiency drops meaningfully as temperatures approach that floor. For pools in regions with sustained cold temperatures, a unit with low ambient operation is a better fit.
W3HP50HA2 Warranty, Manuals, and Install Documentation
The W3HP50HA2 includes a 1-year parts warranty with no labor coverage. Review the installation manual before any work begins to confirm electrical service, water flow, and clearance requirements are met at the site.