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Monobloc air-to-water heat pump with a concentric fan guard on a concrete plinth beside a terracotta jar

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Heat Pumps

Heat pump sourcing for spa and pool applications, beginning with the water system, installation and intended operating conditions.

Explore the options.

Start with the application and the product direction you want to explore.

Spa applications

Discuss water volume, target temperatures, usage pattern and how the unit needs to integrate with the spa. Single-fan and twin-fan arrangements are both available; the twin-fan version covers the higher-capacity range.

Twin-fan pool heat pump with a graphite-coloured cabinet.

Pool applications

Discuss the pool, location, operating season and installation arrangement so that proposals can be assessed against a clear brief.

What decides the size of a heat pump.

Use the following details to define a proposal around your application.

Heating requirements

Water volume, desired temperatures, ambient conditions and the operating pattern defined for the project.

Single round fan grille and a side water connection on a graphite heat pump casing

Electrical and controls

Supply specification, control interface and the requirements for your market.

Water connections

Connection dimensions, water-flow requirements and the proposed plumbing arrangement.

Installation and documentation

Airflow clearances, location, sound information and documentation requested for the specific model.

Configuration, considered together.

Discuss unit arrangement, visible finish, controls and the configuration appropriate to your project. Capacity, efficiency and sound figures must come from the documentation for the proposed model and stated test conditions.

What a heat pump brief has to settle.

Heating is compared against the water body and the site it has to work in, so the conditions matter as much as the output claim.

Prepare a heat pump enquiry - generic sourcing diagram
Shown: the site and duty points a heat pump enquiry has to cover. Output and conditions confirmed per enquiry.

What to have ready

  • Volume of water and whether a cover is used
  • Where it runs: indoor, covered or open air
  • Water temperature you want and how fast
  • Airflow route and clearance around the unit
  • Supply available at the location
  • Distance from the power source and any existing controls

The documents a heat pump quote needs.

Share the intended application, location, water volume, operating temperatures, electrical supply, installation constraints and required documentation.

Reference data

Capacity, refrigerant and supply.

Two tables sit behind every heat pump quotation: the values that decide whether a replacement will fit, and the references our customers already buy against. Send whichever you have and we check the rest.

Specification fields
FieldWhat we confirm
Heating capacity (kW)Heat delivered at the rating condition
COP at rating conditionHeat delivered against electricity used, at a stated condition
Supply and phaseVoltage, and whether single or three phase
RefrigerantRefrigerant the unit is charged with
Water connection sizeInlet and outlet connection
Flow requirementMinimum flow the unit needs through it
Operating rangeAir temperature range the unit is rated for
Noise levelSound pressure at the stated distance
Cross-reference
Reference systemWhy it helps
Unit brand and modelPlaces the replacement against the existing installation
Pool or spa volumeSets the heating capacity the installation needs
Existing connection and flowDecides whether plumbing or pump has to change
Market and certificationDocuments required for the destination market

Values are confirmed per enquiry rather than published as a fixed list, because rating conditions differ between units and markets.

Questions about heat pumps.

Can you recommend a model from water volume alone?

Water volume is only part of the brief. Operating conditions, target temperatures and system requirements also matter.

What documentation should we request?

Share the intended market and the documents you require so that the request can be matched to the specific proposed model.

Is heating capacity alone enough to choose a heat pump?

No. Volume, heat loss, ambient conditions and the electrical supply all affect the choice.

Which refrigerant should be specified?

The refrigerant follows the model and the market it is sold in; type and charge are confirmed with the quotation.

Does the existing pump need to change?

Flow through the unit has to meet its requirement, so pump duty and pipe size are checked before a unit is offered.

Are cold-climate units available?

Units are quoted against the air temperature range they are rated for; the range for the destination is confirmed per enquiry.

Related components.

Explore the parts that may sit alongside this requirement.

Talk to us about this product

Send the product, the target quantity and your destination market — we aim to respond within one working day.

Discuss your requirements