Calorex Commercial All Year Pool Heat Pumps 25 to 100kw



Calorex Commercial Swimming Pool Heat Pumps from HeatPumps4Pools are made in the UK and have a reputation for reliability, and an excellent backup service.

Note: these units have now been discontinued and replaced by the Calorex Commercial Inverter models


1. Description

The Calorex Pro-Pac Extended Season range of heat pumps will work down to -15c and designed to heat pools all year round and for indoor pool use

Calorex units are built to last and have been supplied to the swimming pool industry for decades. Thousands of Calorex units have been successfully operating in some thirty countries. The choice of materials for the components is aimed at a long reliable life.

The cabinets are steel, first galvanised and then coated to provide resilient protection against external elements. Pool water
heat exchangers are of high quality to ensure maximum resistance to pool chemical corrosion.

All models now include a titanium heat exchanger with a five year warranty, plus digital controls.

Each unit is thoroughly tested and inspected and must meet a precise performance standard before leaving the factory. The
Calorex factory and products are approved to several internationally accepted standards of quality and safety.

All Calorex equipment is fully guaranteed and dispatched complete with comprehensive instructions.

2. Features

  • Extremely quiet operation
  • Operate down to -15c degrees
  • Titanium heat exchanger – The use of titanium for the heat exchanger leads to efficient heat transfer without any dangers of corrosion.
  • Digital control panel on all models
  • Green UK & European compliant refrigerant gas
  • Quality powder coated steel casing
  • 3-Year on-site parts and labour warranty (UK Only)
  • Designed & Built For Long Life & Reliability
  • Built in drip tray heater kit to melt ice in very cold weather
  • Electric compressor heater
  • Designed and built in the UK to ISO 9001, for the UK climate
  • Purpose designed components for swimming pool heating
  • Can be installed outside or in a plant room
  • High efficiency spiral wound tube in tube Titanium condenser
  • Leading brand rotary or scroll compressors
  • Water flow switch
  • Pool pump synchronisation control
  • Remote thermostat options
  • Capacities from 8kw to 22kw
  • Choice of single or three phase
  • Soft start options
  • Nationwide service

To help with electrical demands, ‘soft- starts’ can be fitted (if necessary) to any of the units as an optional extra. This reduces the initial electrical current surge associated with compressors. Advice from an electrician may be needed prior to installation.

calorex digital controls

3. What size heat pump do I require for my pool?

For an outdoor pool in the UK that is kept covered, use the following Calorex guide:-

Many factors can affect the sizing of a heat pump for your pool. You are therefore strongly advised to contact us to get an accurate sizing recommendation for your particular pool.

4. Models available:

Model nokwPower
PPT30BMY25.5kw3 Phase
PPT45BMY32kw3 Phase
PPT70BMY50kw3 Phase
PPT90BMY64kw3 Phase
PPT140BMY100kw3 Phase

5. Specifications

Please see Specifications tab at the top of the page

6. Installation

The Calorex Swimming Pool Heat Pump is designed intelligently and exceptionally compact for ease of installation. One of the simple but handy design additions on the Calorex Heat Pump is the integrated flow switch which will sense the water flow and automatically start the heater when the pool pump starts and stop it when the pump shuts off. Simple, but very handy. We can also offer an installation service if required.

We recommend that a bypass is installed to allow the heat pump to be drained in winter if not in use. We sell bypass kits if required.

Please see our Installation Tips pages for information on how to install your heat pump. Our Photo Gallery also has photograph examples of pool heat pump installations and please also see the FAQ pages for more information

Please contact us for further advice

The Pro-Pac range can be installed outdoors or inside a plat room.

Prices include delivery to most UK postcodes. (excludes Scotland and some UK postcodes).

7. Warranty

All Calorex Pro-Pac Commercial heat pumps come with the following warranty:-

  • 1-years in site parts and labour warranty on all components in the UK
  • 1-years parts only warranty on all components in Europe
  • Warranty subject to the unit being installed in accordance with manufacturer’s instructions.

8. Product Literature

Please see the Literature tab at the top of the page for the Brochure and User Manual downloads.  

9. Assistance?

If you need any assistance or advice as to which model would be best for your pool, please feel free to call or Contact Us

for more information, also see our FAQs page

All items sold in accordance with our terms and conditions

for all enquiries, please contact us at




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The prices shown include FREE UK delivery for orders over £50 or £6.50 for orders under £50

We can ship to any country. Please contact us for a shipping quote.

The lead time on most items is normally on a 1-2 day delivery,  subject to availability. Please call to check availability.

Additional information

Weight100 kg

25.5kw, 32kw, 50kw, 64kw, 100kw


3 Phase