Air Source Heat Pumps: service hero

Service

Air Source Heat Pumps

MCS-certified air source heat pump design and installation. Whole-system thinking, Boiler Upgrade Scheme eligible, honest performance talk.

MCSTrustMarkPAS 2030NAPIT
Book a free surveyCall 0800 999 1129

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. 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. 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. 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. 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. 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.

Book a free surveyCall 0800 999 1129
Government grant

Claim up to £7,500 off a heat pump

Through the Boiler Upgrade Scheme. We handle the Ofgem paperwork and deduct it from your final quote. · 2026 budget remaining £295m

Just looking for a swap? Leading boiler brands · Best Price Guarantee

Next step

Check your eligibility

Quick home survey to see if you qualify for the full grant.

See if your home qualifies

What does a heat pump actually cost?

After the grant, less than you'd think.

£8,500–£13,500 after the £7,500 Boiler Upgrade Scheme grant

for a typical 3-bed semi. Includes the outdoor unit, hot water cylinder, controls, pipework, commissioning, MCS certification, BUS application handled by us, and 5–7 year manufacturer warranty on the unit.

What moves it up

Radiator upgrades (2+ rads needed)

What holds it at base

Existing rads correctly sized

What brings it down

Fabric work already done, smaller unit needed

What moves it up

Complex outdoor siting (long runs, acoustic baffle)

What holds it at base

Straightforward side-return siting

What brings it down

Existing hot-water cylinder can be reused

What moves it up

High heat demand (older fabric, big rooms)

What holds it at base

Typical British semi heat demand

What brings it down

Smaller property, 1–2 bed uses a smaller unit

A free survey is how we turn this range into a fixed price. We'll never ask you to commit before the written plan is in your hands.

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Prices last updated: 25 April 2026. We update quarterly.

When a heat pump isn't the right answer

We turn down heat-pump jobs every month.

We want to install heat pumps. They're the right long-term answer for most UK homes. But “most” is not “all.”

We'd advise against installing one when:

  • The property has no usable outdoor space for the unit. Small flats, terraced houses with front-only access, some conservation-area restrictions.
  • The heat demand is too high for available fabric upgrades to close. A Victorian terrace with solid walls, single glazing, and zero insulation would need a 16 kW unit that would struggle on the coldest January days. Fabric first, heat pump later.
  • You're planning to move within 2–3 years. The BUS grant is a gift to the house, not to you. If you're selling soon, you won't recoup the install cost even with the grant.
  • The existing radiators can't be upgraded to run at heat-pump flow temperatures. Rare, but it happens in some older systems where pipework can't handle the flow.

In every case, we recommend the right path instead, often fabric work first, then heat pump 12–24 months later. The survey maps it out.

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