Commercial Air Source Heat Pumps (Air-to-Water)
Heat, properly assessed and delivered
You're considering replacing gas heating with an air source heat pump. The challenge isn't the technology — it's ensuring the transition doesn't disrupt an occupied building, that the numbers genuinely stack up on your tariffs, and that electrical, plumbing, and heat-pump-specific commissioning are handled as one coordinated job, not three separate trades hoping to meet in the middle.
Pretium Synergy acts as your energy-transition orchestrator: we assess your building, design the right system, and deliver it under one fixed-price scope as your single accountable partner.
One partner: from heat-loss survey to operational warmth.
The challenge
Why this needs rigour, not just a quote
Commercial ASHP projects fail on the details that a quick quote skips over:
- Operational disruption: Installation planned without accounting for a building that must stay heated and occupied throughout.
- Compatibility assumptions: Existing distribution systems assumed to be compatible with heat pump flow temperatures without verification.
- Generic economics: Business cases built on generic savings claims instead of your real tariff spread.
- The interface gap: Treating the project as a single-trade job when it genuinely requires three distinct disciplines working in unison.
Pretium Synergy manages these complexities so you don't have to become a heating engineer, an electrician, and a project manager just to get commercial heating replaced properly.
Three disciplines
A multidisciplinary job, not a single trade
A commercial heat pump installation isn't one skill set wearing three hats — it's three genuine disciplines that must work to the same design and the same programme. Most installers hold one discipline well and subcontract the rest, leaving you to manage the interfaces. We hold all three under one design and one contract.
Renewable heating specialism
Heat pump sizing, refrigerant circuit work, and commissioning are distinct disciplines requiring MCS-certified, heat-pump-specific competence. We ensure the core unit is sized and configured correctly for your specific load profile.
Electrical discipline
Heat pumps draw meaningfully more current than most existing commercial circuits are built for. We handle the supply, isolation, and connection safely. Getting this wrong is a safety issue, not an inconvenience.
Plumbing & pipework discipline
Connecting into (or replacing sections of) an existing wet heating system requires precise sizing for heat pump flow temperatures (typically lower than gas boilers). We ensure emitters (radiators/fan coils) are matched to the new system.
The failure point is usually the interface between these trades. We own the interfaces, so you don't have to reconcile them.
How we work
Assess → Design → Deliver → Support
We follow a disciplined four-stage process to ensure certainty at every step.
01
Assess
We conduct a heat-loss survey of your building (not a generic floor-area estimate). We check your existing distribution system's condition, electrical supply capacity, and real gas/electricity tariffs to build a business case on your numbers.
02
Design & approve
We create a site-specific design covering heat pump sizing, placement, distribution changes (radiator upsizing, underfloor, or fan coils), and electrical connection. We handle structural, noise, and DNO applications as part of the core scope.
03
Deliver
Installation is executed under one fixed-price contract, phased around your building staying operational. We manage our team and vetted specialists across all three disciplines — you deal with one company throughout.
04
Support
We handle commissioning, certification, monitoring, and an agreed support period. This includes a defined response plan for faults in an occupied building, not a “best-effort” callback.
Occupied buildings
Delivered without shutting you down
Unlike a home, a commercial site usually cannot go without heat while work happens. We plan installations around your building staying operational.
- Phased works: Replacing systems zone-by-zone to maintain heat in occupied areas.
- Out-of-hours installation: Scheduling critical disruptions during nights or weekends.
- Clear sequencing: An agreed programme before anyone steps on site, not worked out ad-hoc.
For care homes, hotels, and occupied offices, continuity is a design constraint from day one — not an afterthought fitted around the trades' convenience.
Engineering
Sized to your building, not a generic calculation
Commercial heat demand is a different problem from a domestic one. It involves complex occupancy patterns, ventilation loads, hot water demand spikes (e.g. hotels/leisure), and sometimes process heat needs.
- Detailed heat-loss survey: We calculate the exact load before recommending a size.
- Flow temperature verification: We test your existing emitters. If your radiators are too small for heat pump flow temperatures, we tell you plainly what needs to change and where — not as a caveat added after the quote is accepted.
- Right-sizing: Getting this wrong is expensive to fix post-installation. We get it right at the design stage.
Commercial case
The honest business case
Commercial electricity and gas tariffs vary far more than domestic ones. A heat pump's running-cost case genuinely depends on your specific tariff spread, not a generic “heat pumps are cheaper” claim.
- Real SCOP data: Seasonal Coefficient of Performance based on your specific system design.
- Actual tariffs: Your real unit rates and standing charges.
- Regulatory drivers: Factoring in Minimum Energy Efficiency Standards (MEES) and EPC compliance for let properties.
Where the case is marginal, we say so. We help you decide based on reality, not marketing figures.
Grid connection
Solved before it becomes a problem
Commercial heat pumps often need meaningful electrical capacity. A site already close to its supply limit may need reinforcement before installation is even viable.
- Capacity assessment: Conducted at the survey stage.
- DNO application: Managing the G98/G99 route where required.
- Reinforcement: Flagging any required grid upgrades early — before procurement, not after.
We address the grid constraint before the first pipe is laid.
Commercial terms
One fixed price, one contract
Our fixed price covers design, heat-loss survey, structural and electrical assessment, DNO fees, equipment, installation across all three disciplines (electrical, plumbing, refrigeration), commissioning, certification, and an agreed initial support period — one scope, one contract, no separate heating, electrical, and plumbing suppliers to manage.
Unforeseen site conditions (e.g. distribution system replacement beyond the agreed scope or DNO-mandated reinforcement) are identified early and agreed separately before work proceeds.
You define the outcome. We take responsibility for delivering it.
Ongoing relationship
Beyond switch-on
A heat pump fault in an occupied building is a liability question, not an inconvenience — we treat it that way.
- Remote performance monitoring: Tracking efficiency and flow temperatures.
- Agreed response times: Priority support for faults in critical buildings.
- Annual servicing: Coordination of mandatory maintenance and certification.
- Future planning: Integrating solar PV or storage to further reduce running costs.
Who this is for
Built for organisations that need reliable decarbonisation without operational risk
Hospitality
Hotels, resorts, and leisure centres with high hot water demand.
Care & healthcare
Nursing homes and clinics where heat continuity is critical.
Commercial offices
Multi-tenant buildings requiring zoned heating control.
Retail & mixed-use
Sites with complex occupancy patterns.
Industrial
Facilities with mixed space heating and process heat needs.
Landlords & asset managers
Properties requiring MEES/EPC compliance upgrades.
Why Pretium Synergy
Heating without the coordination burden
We are the partner offering a fully integrated multidisciplinary solution.
- Orchestrator mindset: We own the interfaces between electrical, plumbing, and refrigeration.
- Technically rigorous: We validate heat loss, flow temperatures, and grid capacity upfront.
- Commercially honest: We build cases on your real tariffs, not generic claims.
- Operational focus: We design for continuity in occupied buildings.
- Accountable: One contract covers all trades. No blame games.
- Fixed-price: No hidden costs within the agreed scope.
You do not need to manage three trades. You need one partner who knows how to deliver heat properly.
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Ready to replace your heating properly?
Tell us about your building, your existing system, and your tariffs. We'll assess the opportunity and deliver the agreed project — across every discipline it touches — as one accountable, fixed-price relationship.
Commercial heat, safely assessed and properly delivered.