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Home Pool Swimming Pool Heat Pumps & Chillers Hayward Heat Pumps Hayward HeatPro Heat Pump | 95K BTU | Square Platform | W3HP21004T
NOTICE: The pool & spa industry continues to face industry-wide shortages on many products that most vendors expect to last late into 2022. We're allowing items to be purchased so that customers who choose to wait will have their order shipped when product is available. Most vendors are not providing any ETA on when items will be available. WE WILL EMAIL YOU RIGHT AWAY IF YOUR ITEM IS BACKORDERED. 

Hayward HeatPro Heat Pump | 95K BTU | Square Platform | W3HP21004T

Hayward HeatPro Heat Pump | 95K BTU | Square Platform | W3HP21004T Hayward HeatPro Heat Pump | 95K BTU | Square Platform | W3HP21004T

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  • An Ultra Gold corrosion-resistant evaporator fin increases durability in coastal environments
  • A vinyl-coated fan guard protects the fan against the elements and debris
  • Stainless steel hardware eliminates corrosion
  • A UV-resistant, injection molded shell resists rust and deterioration
  • Online part number W3HP21004T is the direct replacement for part number HP21004T.
Purchase Options
Imagine if anytime you wanted to take a dip in the pool-early in the season, late in the fall or just one evening after dark-your pool's temperature was perfect! Hayward's HeatPro Heat Pump, a high-efficiency heater, gives you the ideal water temperature while using less energy than natural gas heaters. It offers an alternative way to heat your pool that is safe, reliable, and energy efficient.

To heat your pool water efficiently, the HeatPro takes the heat from the surrounding air and uses it to warm the water in your pool eliminating wasted energy. Its digital LED control panel provides an easy-to-read digital temperature display, and shows diagnostic codes for quick identification of components that might need service.

Designed with the consumer in mind, the HeatPro's round base and compact footprint is ideal for retrofit replacements, allows for easy installation, and has integrated hurricane tie-downs to meet local codes. Also, adding value is its ArmourCoil protected heat exchanger, which allows the water passing through the system to be heated and returned to the pool. With its precision electronic temperature control, the perfect water temperature is constantly maintained, providing continued energy savings. The HeatPro Heat Pump can save you up to 80% on your heating costs, paying for itself in just one year. Why not save money, savor your backyard oasis and be environmentally conscience-all while staying cool.

Hayward HeatPro heat pumps incorporate titanium counter-flow heat exchangers for unrivaled and uncompromising performance even under the harshest conditions. Other key features include: heavy-duty, super-quiet scroll compressors; durable injection-molded UV-resistant body panels that are impervious to rust and deterioration; stainless steel hardware; and a polyethylene screen to protect the evaporator coil from damage. Plus, Hayward HeatPro heat pumps are lightweight, compact and easy to install or service, making them ideal for both new pools and spas and existing system upgrades.
Brand Hayward
Sub Brand Heat Pro
Item Heat Pump
Series H-Series
Series H-Series
Heat Output BTUH 95,000
Coefficient of Performance 6.2
Refrigerant Model R410A
Voltage Rating 230 V
Minimum Circuit Ampacity 36 A
Maximum Breaker Size 50
Flow Rate 30 to 75 gpm
Control Type Digital Electric, Dual Thermostat
Cabinet Width 30-1/4 Inch
Cabinet Height 37 Inch
Cabinet Depth 34 Inch
Water Connection 2 Inch x 2-1/2 Inch Unions
Housing Material Stainless Steel

BTU Rating
Q & A
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 20 questions Browse 20 questions and 9 answers
How much to run this , how many degrees will this change the water in a 15000 gallon pool and how long does it take to change the temperature??
Marc V on May 22, 2018
Will this work Ok on a 23,000 gallon pool with an auto cover?
Elisa B on Jun 6, 2017
Will this heater work on above ground pools?
A shopper on May 5, 2020
We live in Tucson, AZ and have a 10,000 gallon pool. Is this the best Heat Pump pool heater for us?
A shopper on Nov 4, 2017
BEST ANSWER: My Pool is about 8500 gallons. This heater has great reviews.I live in southern fl . It takes about an hour or less per degree when heater is on. The warmer the air temperature the faster it will heat. The 9500 should be good for your pool. I use a solar blanket in winter months really helps . I keep Pool at 83 to 85 cost about a dollar a day. To run. Hope this helps.
refrigerant is leaking is ther a common area for this to leak ?
A shopper on Oct 6, 2017
will this work with an above ground pool?
A shopper on Jun 18, 2021
BEST ANSWER: That's what I use it for. Works great!
Will this work on an above ground pool?
Flygirl158 on Mar 28, 2021
I have propane, above ground pool. Will it work?
Angela Z on Mar 10, 2021
BEST ANSWER: This is an electric heat pump. You would need a different heater if using with propane.
JUst wondering what fautly codes are F 5 and LP HP?
Romeo on Feb 10, 2020
BEST ANSWER: Your owner's manual should have explanations for all of the display codes. You can find the owner's manual on the resources tab of the product pages.Here are the display code meaning from this heater's owner's manual.

F3: Unit currently in defrosting cycle (the fan works but the compressor is stopped). This is normal operation when outside temperatures are cold.

LP & LP3: Shortage of refrigerant gas in the unit or faulty low pressure control. The digital display will show LP3 after 3 LP faults and shut down your pool heater. The pool pump will also be stopped for protection if the unit’s internal time clock feature is used. If LP or LP3 occurs you should call for service.

HP & HP3: Low water fl ow to the unit or faulty high pressure control. Check water flow. Backwash filter and/or heater. The unit will show HP3 after 3 HP faults. This will stop your heater for protection.
how loud is this unit? im looking for the quietist possible.
matt w on Feb 2, 2020
BEST ANSWER: It is very quite...hardly hear it running....
Does Hayward make a pump that will cool and heat?
A shopper on Sep 27, 2021
I have a 35,000 gallon pool. Please advice best way to heated it?
victor D on Apr 29, 2021
I have a 20k gallon Inground pool and I’m looking for the best electric heater?
daniel on Mar 14, 2021
We cannot get our brand new unit to turn on, is there some trick to starting a new unit. It is getting power, but the switch went turn it on.it is a question, how do you start the unit?
John B on Oct 11, 2020
does the hayward heat pump, w3hp21004t have an auto defroster?
A shopper on Sep 24, 2020
Is there a cover for this unit for off season ?
A shopper on Sep 19, 2020
Can this be used for an aboveground pool?
A shopper on Apr 30, 2020
How do I winterize my hayward pro pool heat pump?
A shopper on Dec 23, 2019
How much is shipping to Venice , Florida? Is tax collected?
Jim K on Sep 17, 2019
What is shipping cost to Desert Hot Springs, CA 92240 ?
A shopper on Apr 20, 2017
4.8 / 5.0
4 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Can't go wrong with a Hayward -
Arrived on time - Very easy to install - Only took me about 4 hours - Thought I would need help but after checking around and finding everyone wanting a couple thousand to do it I just decided to give it a go myself.

Works great, keeps my 16,000 gallon pool at 90 degree's without a pool cover -
October 11, 2019
over 2 years ago
Rated 5 out of 5
Great purchase
Great service and delivery. Easy set up and operation. Heated po to 83 in under 6 hours. Runs only a brief time overnight to maintain temperature.
September 3, 2019
over 2 years ago
Rated 5 out of 5
Great Product
We got it installed and it only took a few days to get the pool water up from low 60's to a comfortable 84. It is great to be able to swim in South Texas in January!
January 24, 2021
1 year ago
Rated 4 out of 5
Pool Heater
Unfortunately the pool heater I received was not the one originally advertised. The customer service however has been fantastic
May 21, 2018
over 4 years ago
Warranty applies only to products that were purchased from Hayward authorized sellers. Pool Supply Unlimited is a Hayward Authorized Online Reseller.
See Warranty Information PDF for warranty details.
For Hayward warranty registration information, and to submit online, please visit www.hayward-pool.com
This information was updated on 4/22/2022. For the most current information and full warranty policy please visit www.hayward-pool.com

 Adobe Acrobat PDF Warranty Information
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Pool Supply Unlimited is an e-commerce company that loves water. We love to pump it, filter it, heat it, chlorinate it, light it up and stare at it while we're barbequing a fat, juicy steak. There are real pool professionals working here. Our guys have seen thousands of pools in their careers, no exaggeration. We are based in Southern California and can land most products to your door (within the 48 contiguous states) in less than a week.
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