It’s Time to Move On From Gas
A Smarter, Cleaner Alternative to Gas Heating.
Pretium Synergy delivers high‑performance air source heat pump installation for commercial buildings — replacing inefficient gas boilers with next‑generation R290 heat pump systems designed for lower running costs, reduced carbon emissions.
As organisations across the UK move away from fossil‑fuel heating, our commercial heat pump installations typically achieve 20–50%+ reductions in heating energy costs, depending on tariff structure, system flow temperatures, building fabric and control strategy. For estates teams, FM providers and sustainability leaders, electrification offers immediate operational savings and a clear pathway to Net Zero.
Powered by natural refrigerant R290 (GWP ≈ 3), our ASHP solutions deliver outstanding high‑temperature output — ideal for commercial boiler replacement in offices, schools, health facilities, industrial units, leisure centres and mixed‑use estates. R290 technology provides excellent efficiency at part‑load, stable performance in cold weather, future‑proof regulatory compliance and a considerably lighter climate footprint.
Pretium Synergy provides a complete service, including heat‑loss calculations, system design, installation, commissioning and lifecycle optimisation, ensuring your building transitions to a high‑efficiency, low‑carbon heating system engineered for long‑term performance.
👉 Make your heating sustainable
Air Source Heat Pumps: Two Types — Know the Difference
(This page covers Air-to-Water heat pumps. For Air-to-Air, use the link below.)
Air Source Heat Pumps (ASHPs) come in two categories, and choosing the right one depends entirely on whether you need heating + hot water (full boiler replacement) or comfort heating/cooling (like airconditioning).
1) Air-to-Water Heat Pumps
(This Page)Air-to-Water ASHPs supply:
- Radiators
- Under-floor heating
- Commercial heating circuits
- Domestic Hot Water (DHW)
They are the correct choice for boiler replacement and for buildings that need a central heating and hot-water system.
2) Air-to-Air Heat Pumps
(Go to our other page)Air-to-Air systems:
- Deliver warm or cool air (like reversible AC)
- Do not heat water
- Do not connect to radiators or UFH
- Provide room-by-room heating & cooling
They are ideal for offices, retail, hospitality, and any building needing cooling + space heating, rather than a full wet-heating replacement.
👉Visit Air-to-Air Heat Pumps & AC PageThis entire page — including R290 technology, survey methodology, system design, installation and commissioning — refers specifically to Air-to-Water heat pumps.
| Feature | Air-to-Water Heat Pump | Air-to-Air Heat Pump |
|---|---|---|
| Primary Function | Space heating + hot water | Space heating + cooling |
| Distribution Method | Water-based system (radiators, UFH, cylinders) | Direct-to-air via indoor fan units |
| Hot Water Production | ✔ Yes | ✖ No |
| Cooling Capability | ✖ No | ✔ Yes (air-conditioning) |
| Best For | Buildings replacing boilers or needing hot water | Offices, retail, hospitality, spaces needing year-round temperature control |
| Installation Requirements | Requires pipework & water connections | Requires ductless indoor air units |
| Energy Efficiency | Very high for heating & Hot Water | Very high for heating & cooling |
| Typical Commercial Uses | Warehouses, residential blocks, training centres, schools | Offices, gyms, retail units, classrooms, server rooms |
| Ideal Replacement For | Gas/oil boilers, electric heaters | Air-conditioning units |
How We Work
1. Survey & Analysis
We also complete all safety and fire-risk considerations, ensuring the project is fully aligned with MCS survey standards from the very start.
2. System Design
The system layout, equipment selection and control strategy are all designed in accordance with MCS design standards, ensuring efficiency, consistency and compliance.
We also highlight future upgrade opportunities so your heating system can evolve as your needs change.
3. Approvals & Compliance
All documentation and calculations follow MCS compliance requirements, giving you confidence that the installation meets the recognised UK standard for low-carbon heating.
4. Professional Installation
We take great care to integrate the system cleanly with your existing heating circuit while protecting the fabric of your building. All work is carried out neatly, safely and with minimal disruption to your operations.
5. Commissioning, Optimisation & Warranty
All warranties are activated, and you receive a digital handover pack with documentation, photos, and clear operating guidance.
We also provide on-site training so your team feels confident from day one.
6. Ongoing Care
We offer remote support and fast assistance whenever needed, ensuring long-term reliability and strong performance.
Ongoing care is delivered with full awareness of MCS service and maintenance expectations, helping maintain system performance over its lifespan.
Why R290 for Heating — and Why R32 Still Shines in Cooling
Different applications demand different refrigerants — choosing correctly is key to performance and long-term efficiency.
Built for Heating
A natural refrigerant with ultra-low global warming potential (~3), R290 is engineered for high-temperature performance — making it ideal for replacing traditional gas boilers.
Its efficiency and environmental profile align with the UK’s ongoing F-Gas phasedown and long-term decarbonisation strategy.
Optimised for Cooling
R32 is a widely adopted A2L refrigerant with a GWP of 675, offering strong cooling efficiency, compact systems and mature installation standards.
It remains highly competitive for offices, retail and hospitality environments where cooling performance is critical.
R290 is the future of low-carbon commercial heating.
R32 continues to excel in cooling applications.
