Commercial Heat Pump Manufacturers UK: How to Compare Suppliers & Systems
Last updated: August 2026
The UK commercial heat pump market includes conventional heating manufacturers, large HVAC groups, natural-refrigerant specialists, ground-source companies and manufacturers focused on much larger industrial and process-heat applications.
This independent guide explains how to compare commercial heat pump manufacturers properly — including output at design conditions, refrigerant, flow temperature, cascade capability, controls, UK support, commissioning and whole-system suitability.
• Independent UK heat pump researcher
• Updated for 2026
Quick Answer: How Do You Compare Commercial Heat Pump Manufacturers?
The best commercial heat pump manufacturer cannot be identified from brand recognition or headline efficiency alone.
A useful comparison starts with the project’s requirements and then checks which manufacturers can meet them.
The most important areas normally include:
- Heating capacity at the required outdoor and water temperatures
- Available system sizes
- Maximum and practical operating temperatures
- Refrigerant
- Part-load performance
- Minimum modulation
- Single-unit, cascade or modular configuration
- Heating and cooling capability
- Domestic hot-water capability
- Building management system integration
- Noise data
- UK technical support
- Commissioning support
- Warranty conditions
- Service and spare-parts provision
Start with the requirement, not the manufacturer
A well-known commercial heat pump brand can still be unsuitable if its equipment does not match the building’s heat demand, operating temperature, electrical infrastructure, controls or heating and cooling profile.
If you are still deciding which heat-pump technology is appropriate, begin with our Commercial Heat Pumps UK guide.
What Counts as a Commercial Heat Pump Manufacturer?
The term commercial heat pump manufacturer covers several very different types of business.
Some companies manufacture relatively conventional air-to-water heat pumps for commercial buildings. Others operate across much larger heating, cooling and applied HVAC systems. Specialist manufacturers may concentrate on natural refrigerants, hot water, ground source or industrial process heat.
| Manufacturer Type | Typical Focus | Where It May Be Relevant |
|---|---|---|
| Commercial heating manufacturer | Air-to-water systems, boiler replacement and commercial heating | Schools, offices, healthcare, retail and similar buildings |
| Applied HVAC manufacturer | Heat pumps, chillers, heat recovery and larger central plant | Large buildings, campuses and complex heating/cooling projects |
| Natural-refrigerant specialist | R290, CO₂ and other low-GWP technologies | High-temperature heating, hot water and specialist commercial applications |
| Ground-source specialist | Ground-source and water-source systems | Projects with suitable boreholes, ground arrays or water sources |
| Commercial hot-water specialist | High-volume domestic hot-water production | Hotels, leisure, healthcare and other high-DHW-demand buildings |
| Industrial heat-pump manufacturer | Process heat, waste-heat recovery and larger temperature lifts | Manufacturing and industrial processes |
That is why comparing every commercial heat-pump manufacturer in one simple best-to-worst ranking would be misleading.
Clade Engineering
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Clade Engineering is a British commercial and industrial heat-pump manufacturer established in 1985. Its current systems are designed and manufactured in the UK, with a particular focus on natural refrigerants including CO₂ (R744) and R290 propane.
The range covers several different commercial requirements rather than a single heat-pump platform. Current examples include the Acer CO₂ range at approximately 50kW to 75kW, the Elm R290 in 50kW and 70kW models, and the modular Maple CO₂ range, which Clade publishes at capacities up to 500kW under stated operating conditions.
| Clade Range | Refrigerant | Published Capability | Potential Application |
|---|---|---|---|
| Acer | CO₂ / R744 | Approximately 50kW–75kW, with published high-temperature operation | Commercial heating and hot-water applications |
| Elm | R290 / propane | 50kW and 70kW models; flow temperatures up to 80°C | Higher-temperature retrofit and commercial heating applications |
| Maple | CO₂ / R744 | Modular range with published capacities up to 500kW at specified conditions | Larger commercial heating and hot-water systems |
| Rowan 2 | R290 / propane | Modular design with flow temperatures up to 80°C and reversible cooling capability | Larger commercial and industrial applications |
Clade’s wider published portfolio extends from systems at around 50kW into modular multi-megawatt applications, which means the company can operate across conventional commercial buildings as well as larger industrial and district-scale projects.
One distinction is its service model. Clade offers design, manufacture, installation and ongoing maintenance rather than limiting its involvement to equipment supply. For some organisations, that can reduce the number of separate parties involved between system specification and long-term service support.
Clade Engineering Systems Group is also a certified B Corporation, with B Lab listing its certification from February 2024.
Higher flow temperatures can be particularly useful in some retrofit and hot-water projects, but operating temperature should still be treated as an engineering decision rather than a reason to retain an existing system unchanged.
Manufacturer vs Supplier vs Installer vs Consultant
These terms are sometimes used interchangeably, but they describe different roles.
| Organisation | Main Role |
|---|---|
| Manufacturer | Develops and manufactures the heat-pump equipment or complete product platform. |
| Distributor / supplier | Supplies equipment into the market and may provide technical or commercial support. |
| Building-services consultant | Can assess requirements and design or specify the wider heating and cooling system. |
| Mechanical contractor / installer | Installs and integrates the selected equipment and associated system components. |
| Commissioning specialist | Tests, configures and verifies operation of the installed system where required. |
Commercial Heat Pump Manufacturer Comparison Checklist
Use the same criteria when comparing different manufacturers so that marketing claims and technical data are assessed consistently.
| Comparison Area | What to Ask | Why It Matters |
|---|---|---|
| Capacity | What heating output is available at the project’s actual design conditions? | Nominal catalogue capacity may differ from cold-weather or high-temperature output. |
| Flow temperature | What temperature is required and how does performance change at that point? | Higher temperatures can materially affect efficiency. |
| Refrigerant | Which refrigerant does the proposed equipment use? | Affects safety, system design, environmental impact and future product strategy. |
| Part-load performance | How efficiently does the unit operate below peak demand? | Most buildings operate below design peak for much of the year. |
| Minimum output | How far can the system modulate down? | Important for avoiding poor low-load operation and excessive cycling. |
| Cold-weather performance | What capacity and COP are published at the project’s winter design condition? | Air-source performance changes as outdoor temperatures fall. |
| Cascade capability | How many units can operate together and how are they controlled? | Can affect capacity, redundancy and part-load operation. |
| Cooling | Can the system provide reversible cooling? | May allow heating and cooling plant to be considered together. |
| Heat recovery | Can heat rejected from one part of the building be reused elsewhere? | Potentially valuable where heating and cooling demands overlap. |
| Hot water | Is the system suitable for the required DHW temperatures and recovery rates? | Commercial hot-water loads can differ substantially from space heating. |
| Noise | What sound power data is available at relevant operating conditions? | Siting can be a significant constraint on commercial air-source projects. |
| BMS integration | Which communication protocols and control interfaces are supported? | Commercial buildings often require central monitoring and control. |
| Monitoring | What energy and performance data can be captured? | Useful for comparing real performance with design expectations. |
| Commissioning support | What manufacturer involvement is available during commissioning? | Controls and system setup can materially affect performance. |
| UK support | What technical support, training and service capability exists in the UK? | Particularly important for long-life commercial plant. |
| Warranty | What are the conditions, exclusions and maintenance requirements? | Headline warranty length alone does not describe the full protection. |
Compare Output at the Actual Design Condition
One of the easiest mistakes when comparing manufacturers is to put nominal heating capacities side by side without checking how those figures were measured.
A heat pump described as 100kW does not necessarily deliver exactly 100kW under every combination of outdoor temperature and leaving-water temperature.
For an air-source project, request manufacturer data covering:
- The project’s winter outdoor design temperature
- The required leaving-water temperature
- The expected return-water temperature
- Available heating capacity
- Electrical input
- COP
- Defrost allowances where relevant
Compare like with like
A manufacturer publishing strong performance at 35°C water temperature should not automatically be considered more efficient than another product being assessed at 55°C or 65°C.
For more on these design conditions, read our Commercial Air Source Heat Pumps UK guide.
Commercial Air Source Heat Pump Manufacturers
Air-to-water is one of the most important commercial heat-pump categories because it can serve water-based heating systems without requiring boreholes or another external heat source.
When comparing commercial air source manufacturers, investigate:
- Individual-unit capacity range
- Output at low outdoor temperatures
- Maximum and recommended water temperatures
- Defrost strategy
- Minimum modulation
- Cascade controls
- Maximum number of connected units
- Reversible cooling
- Noise
- Outdoor-unit spacing requirements
- BMS integration
Our Commercial Air Source Heat Pumps UK guide explains the technology before you start comparing equipment.
R290 Commercial Heat Pump Manufacturers
R290 propane is increasingly relevant to commercial heat-pump research, particularly where higher water temperatures or a natural-refrigerant strategy are important.
Manufacturer comparisons should look beyond the refrigerant name and establish:
- Available output range
- Performance at required temperatures
- Refrigerant charge
- Safety classification
- Installation clearances
- Equipment-location requirements
- Training and service arrangements
- Cascade capability
See our full R290 Heat Pumps UK guide for the refrigerant itself.
High-Temperature Commercial Heat Pump Manufacturers
Manufacturers increasingly offer equipment designed to produce higher water temperatures than traditional low-temperature heat-pump systems.
This can be useful for:
- Existing commercial radiator systems
- Domestic hot water
- Healthcare and hospitality
- Buildings where widespread emitter replacement is difficult
- Certain industrial applications
But the comparison should not stop at the maximum temperature printed on a brochure.
Request performance data showing:
- Available capacity at the required temperature
- COP at that operating point
- Outdoor-temperature limitations
- Whether the maximum temperature can be maintained continuously
- How performance changes across the operating envelope
Our High-Temperature Heat Pumps UK guide explains why maximum temperature and efficient operating temperature are not the same thing.
Commercial vs Industrial Heat Pump Manufacturers
A manufacturer suitable for commercial building heating is not automatically the right supplier for an industrial process-heat project.
| Commercial Building Manufacturer | Industrial Heat Pump Manufacturer | |
|---|---|---|
| Typical application | Space heating, cooling and hot water | Process heat and waste-heat recovery |
| Design starting point | Building heat and cooling load | Process heat source and required sink temperature |
| Operating profile | Often seasonal | Can operate for long production hours throughout the year |
| Capacity | From light commercial to large central building plant | Can extend into much larger industrial duties |
| Integration | Heating distribution, cooling and BMS | Production equipment, process streams and heat recovery |
If your requirement involves process heat, manufacturing or waste-energy recovery, use our dedicated Industrial Heat Pumps UK guide.
Does UK Manufacturing Matter?
Searching for a UK commercial heat pump manufacturer can mean two different things:
- a heat pump physically manufactured in the UK; or
- a manufacturer whose equipment is sold and supported in the UK.
Those are not the same.
For many commercial buyers, country of manufacture may be relevant to procurement policy or supply-chain objectives, but long-term UK technical support can be equally important.
Ask:
- Where is the equipment manufactured?
- Where are replacement components stocked?
- Is UK-based technical support available?
- Who commissions the equipment?
- Who provides warranty support?
- What installer or contractor training is available?
- What happens if specialist technical assistance is required?
Manufacturer Support Can Matter as Much as the Product
A commercial heat pump is expected to form part of a building’s mechanical infrastructure for many years.
Manufacturer support can therefore become an important procurement factor.
Before Installation
- Technical selection
- Performance data
- Hydraulic guidance
- Controls information
- Acoustic data
During Installation
- Contractor support
- Controls integration
- Commissioning assistance
- Technical troubleshooting
After Installation
- Warranty
- Remote diagnostics
- Service support
- Replacement parts
- Long-term product knowledge
These questions should be considered alongside project cost. Our Commercial Heat Pump Costs & Running Costs UK guide explains why equipment purchase price alone does not determine whole-life value.
What Documentation Should a Commercial Manufacturer Provide?
Good manufacturer information should allow a designer or buyer to investigate how the equipment behaves at the project’s actual operating conditions.
Useful information can include:
- Technical datasheets
- Capacity tables
- COP and efficiency data
- Operating envelopes
- Sound power data
- Pressure-drop and flow requirements
- Electrical data
- Refrigerant information
- Installation clearances
- Cascade documentation
- BMS communication information
- Hydraulic schematics
- Commissioning requirements
- Warranty terms
- Maintenance schedules
Marketing claims are useful for discovering a product. Technical documentation is what should be used to verify whether it can meet a project’s actual requirements.
Manufacturer Comparison Red Flags
Take extra care where a product or proposal relies heavily on:
- Maximum output without stating the operating condition
- Maximum flow temperature without efficiency data
- A headline COP without test temperatures
- Claims of guaranteed energy savings
- A generic payback period applied to every building
- Sizing based only on existing boiler capacity
- No clear electrical-input data
- No explanation of defrost performance for air-source systems
- No published noise information
- Unclear commissioning responsibility
- Unclear UK support arrangements
The complete system should be assessed before equipment is selected. See our Commercial Heat Pump Installation, Design & Procurement Guide for the wider process.
How to Shortlist Commercial Heat Pump Manufacturers
A practical shortlist can be built in stages.
1. Define the heat demand
Establish peak heat load and annual demand rather than starting with existing boiler capacity.
2. Establish the required temperatures
Determine the lowest practical flow temperature and any separate hot-water requirements.
3. Decide which heat source is appropriate
Compare air source, ground source, water source and any available waste-heat opportunities.
4. Define heating and cooling requirements
Establish whether the system needs heating only, reversible cooling or simultaneous heating and cooling.
5. Establish capacity and resilience requirements
Decide whether one unit, a cascade or a more modular system architecture is required.
6. Shortlist compatible manufacturers
Only after the requirements are understood should individual manufacturers and product ranges be compared.
7. Compare evidence at identical conditions
Request technical data at the same source and sink temperatures wherever possible.
8. Compare support and whole-life considerations
Technical support, commissioning, maintenance and parts availability should form part of the decision.
Manufacturer selection comes after system requirements
This approach reduces the risk of choosing a product first and then redesigning the building around whatever that product happens to do well.
Commercial Heat Pump Research by Topic
| If You Are Researching… | Continue Here |
|---|---|
| The wider commercial heat-pump market | Commercial Heat Pumps UK → |
| Commercial air-to-water systems | Commercial Air Source Heat Pumps UK → |
| Installation and operating costs | Commercial Heat Pump Costs UK → |
| Design, specification and procurement | Commercial Heat Pump Installation Guide → |
| Manufacturing and process heat | Industrial Heat Pumps UK → |
| Propane refrigerant | R290 Heat Pumps UK → |
| 70°C+ and higher-temperature systems | High-Temperature Heat Pumps UK → |
Frequently Asked Questions
How do I choose a commercial heat pump manufacturer?
Start by establishing the building’s heat load, required temperatures, cooling and hot-water requirements and electrical constraints. Then compare manufacturers using performance data at those actual operating conditions, together with controls, noise, support and commissioning requirements.
Is there one best commercial heat pump manufacturer?
No. Commercial heat-pump manufacturers serve different capacities, temperatures and applications. A manufacturer suited to a school heating retrofit may not be appropriate for a large industrial process-heat project.
What is the difference between a commercial heat pump manufacturer and supplier?
A manufacturer develops and produces the equipment, while a supplier or distributor provides products into the market and may also offer technical and commercial support.
What should I compare between commercial heat pump brands?
Compare capacity at design conditions, efficiency, flow temperature, refrigerant, modulation, cascade capability, heating and cooling functions, noise, controls, BMS compatibility, UK technical support, commissioning, warranty and maintenance requirements.
Should I choose a commercial heat pump manufacturer before the system is designed?
Usually the project requirements should be established first. That allows manufacturers and products to be shortlisted against the required capacity, temperatures, system architecture and controls rather than designing around a preferred brand.
Are R290 commercial heat pumps available?
Yes. R290 propane is increasingly used in commercial heat-pump equipment, including systems designed for relatively high water temperatures. Project-specific safety and installation requirements need to be considered because propane is flammable.
How should high-temperature commercial heat pumps be compared?
Do not compare maximum water temperature alone. Check available heating capacity and efficiency at the actual flow temperature and outdoor or source temperature required by the project.
Sources & Further Reading
This guide uses independent and industry sources to understand commercial heat-pump applications, system design and the developing UK non-domestic market. Manufacturer specifications should be reconfirmed before equipment is selected.
Commercial Heat Pump Guides
Comparing Commercial Heat Pump Equipment?
Define the capacity, operating temperatures, heating and cooling requirements and system design first. Then compare manufacturers against the same technical conditions.