Service
Air Source Heat Pumps
MCS-certified air source heat pump design and installation — whole-system thinking, Boiler Upgrade Scheme eligible, honest performance talk.
Why this matters
Gas bills that keep climbing — and a gas boiler nearing end of life
Heat pumps are the clearest route off volatile gas prices and toward lower-carbon heating. But heat pumps are not a direct boiler swap. Sizing, emitters, insulation context, controls, and commissioning each make the difference between a system that performs beautifully for fifteen years and one that disappoints from the first winter. Getting the design right is the whole job.
What you get
A heat pump sized for your home, your habits, and your building fabric
Low-carbon heating that performs in real winter conditions — not just on manufacturer spec sheets
Running costs you actually understand, with honest tariff modelling — not marketing bill-slash claims
Full MCS documentation, TrustMark lodgement, and the paperwork required for the £7,500 Boiler Upgrade Scheme grant
A commissioning and handover process that leaves you genuinely knowing how to run your system
Our approach
Survey-led, whole-system design
We treat the heat pump as one part of the building — not a box to be bolted to a wall. Our MCS-certified surveyors run a full room-by-room heat loss calculation to BS EN 12831, assess your existing emitter capacity, check electrical supply, model noise at your boundary, and test pipework before we size anything.
Room-by-room heat loss calculation
A full calculation, documented and shared with you. We do not rely on rules of thumb or kWh-per-square-metre shortcuts — both are commonly wrong by 30% or more.
Emitter and pipework review
Radiators, underfloor, pipe bore — heat pumps work at lower flow temperatures, which means some emitters need upgrading. We quantify exactly what.
Realistic running cost modelling
We model your expected annual running cost across two or three tariff scenarios — standard, Octopus Cosy, and export-aware if you have solar. No 'three times more efficient' shortcuts.
Noise assessment at boundary
MCS 020 noise calculation performed at survey. We propose placement that meets permitted-development noise limits, and specify anti-vibration detailing where it matters.
How it works
- 1
Desktop feasibility call
A fifteen-minute conversation to understand your property type, current heating, and what is driving the conversation. We tell you honestly whether a heat pump is likely to be a good fit before we book a survey.
- 2
Full technical survey
A qualified surveyor visits, measures every room, photographs every radiator, checks your incoming electrical supply, and reviews roof orientation if solar is relevant too. Typically two hours on site.
- 3
Written design and fixed quote
Within five working days, you receive a full design pack: heat loss calculation, unit recommendation, cylinder specification, emitter changes required, cost breakdown, BUS eligibility confirmation, and a delivery timeline.
- 4
Installation
Typically three to five days on site. Outdoor unit placement, internal works, cylinder install (if required), pressure testing, MCS commissioning, and handover walk-through. Dust sheets throughout.
- 5
Optimisation and follow-up
We return six weeks after commissioning to fine-tune the weather compensation curve based on how you actually use the system. BUS grant paperwork is handled by us throughout.
Our signature honesty
Where we won’t fit it
If your fabric is poor and you haven’t done the insulation first, a heat pump will disappoint you — and the bills won’t come down the way you expected. If your emitters are all small old radiators sized for 80°C flow, they’ll need replacing or supplementing. If you have no outside space for the unit at a safe distance from boundaries, an ASHP isn’t the right product. We’ll tell you all of this on day one. Sometimes we’ll recommend a high-efficiency gas boiler now and a heat pump after the insulation pathway. That’s a real answer — not a sales decision.
Key benefits
£7,500 off with the Boiler Upgrade Scheme
Fully-funded government grant, applied directly as a discount on your quote. We submit the application and handle Ofgem correspondence on your behalf.
Lower-carbon heating, properly designed
Electrified heat, typically 3–4× more efficient than a gas boiler when the system is correctly sized and commissioned.
Quiet operation, quietly installed
Modern units run at 45–55 dB at one metre. With thoughtful placement and anti-vibration detail, the unit is quieter than your fridge from inside the house.
MCS documentation from day one
Full MCS install certificate, TrustMark lodgement, and product warranty registration. Everything you need for the BUS grant, insurance, and any future sale.
The certifications behind this work
For this service specifically, we operate under the following industry accreditations. Each one has passed audit and is verifiable with the issuing body.
- MCS
- TrustMark
- PAS 2030
- NAPIT
Frequently asked questions
Will a heat pump actually work when it is minus five outside?+
Yes — modern inverter heat pumps operate efficiently down to around minus fifteen and can still produce heat below minus twenty-five. The question is whether the system has been sized for your coldest day, not whether the technology is capable. Our heat-loss calculation uses a design external temperature that reflects your postcode's actual extremes — not a generic UK average.
Do I need to replace all my radiators?+
Often, no — but frequently some. Heat pumps work best with larger emitter surface area at lower flow temperatures. Many 1990s-or-newer properties need only one or two radiator upgrades. Victorian solid-walled homes with small cast-iron radiators usually need more. Your survey will quantify this room by room.
How much will it actually save me?+
Running cost depends on your tariff, your insulation level, your setpoint preferences, and your hot water usage. On the standard dual-fuel tariff with a well-insulated property, running costs are typically 10–30% lower than gas. On a heat-pump-friendly tariff like Octopus Cosy, savings can be 30–50%. We model your specific situation at survey — no generic marketing numbers.
Does the £7,500 BUS grant apply to me?+
The Boiler Upgrade Scheme grant is open to almost all English and Welsh homeowners replacing fossil fuel heating with an air source heat pump. Your property must have a valid EPC without outstanding loft or cavity insulation recommendations, and the installation must be completed by an MCS-certified installer (which we are). We confirm your eligibility at survey and handle the application.
What happens if the heat pump breaks?+
You receive a five or seven year manufacturer warranty (depending on the unit), a two-year installation workmanship warranty from us, and a named contact for technical support. MCS-compliant installation is a condition of all major manufacturer warranties — another reason to pick an MCS installer.
Will I lose my combi boiler and need a hot water cylinder?+
In most cases, yes — heat pumps work best with a stored hot water cylinder rather than heat-on-demand. We specify a cylinder sized to your actual hot water usage and fit it somewhere sensible (airing cupboard, utility room, loft). For smaller properties with limited space, high-temperature heat pumps or thermal stores offer alternative routes.
Ready to talk about air source heat pumps?
Book a free survey. A qualified engineer will visit, assess your property honestly, and send a written recommendation within five working days. No obligation.