Darlington & North YorkshireOpen 8am–8pm, 7 days info@greencoresolutions.co.uk07414 209357 Services Service Areas AboutOur WorkReviewsContact07414 209357Request Estimate - Home - / - Services - / - Air Source Heat PumpsService · North Yorkshire # Air Source Heat Pump Installationin Darlington & North YorkshireMCS-grade (via partner), BUS-grant eligible Cut your heating bills by up to 50% versus oil, qualify for the £7,500 Boiler Upgrade Scheme grant, and run your home on a system that's 300–400% efficient — designed, installed and commissioned by an MCS-grade (via partner) team with 30 years of heating engineering behind it. Request Fixed-Price Quote 07414 209357 MCS-grade (via partner) · MCS install delivered via accredited partner · 7-year manufacturer warranty MCS Certified installer £7,500 MCS install via partner 400% Typical seasonal COP 7 yr Manufacturer warranty Free In-home heat-loss survey Service Overview ## What you need to know What it is An air source heat pump (ASHP) extracts low-grade heat from outside air — even at -15°C — and upgrades it to usable temperatures (45–55°C) for radiators, underfloor heating and hot water. A typical home install includes the outdoor unit, indoor cylinder, smart controls, pipework upgrades and (where needed) radiator resizing. Who it's for Homes off the gas grid currently running on oil or LPG (biggest savings), households planning a new build or major refurbishment, owners of well-insulated homes looking to decarbonise, and anyone whose oil boiler is at end of life and who wants to qualify for the £7,500 BUS grant. When you need it Whenever your existing heating is due for replacement, during a major refurbishment, or when planning a new build. ASHPs are most cost-effective when fitted alongside loft and cavity insulation works — we'll tell you honestly if your home isn't ready yet. Why professional matters Heat pumps are the only domestic heating technology that produces more energy than they consume. A well-designed ASHP runs at a Seasonal Coefficient of Performance (SCOP) of 3.5–4.5 — meaning every £1 of electricity yields £3.50–£4.50 of heat. The Boiler Upgrade Scheme grant of £7,500 brings the up-front cost to within touching distance of a high-end gas boiler. What it costs to delay ## The real consequences of putting it off Heat pump installations are unforgiving of cut corners. A badly designed system can cost more to run than the oil boiler it replaced. Here is what poor specification looks like: ### Undersized emitters If radiators are too small for the lower flow temperatures, the home never reaches setpoint, the homeowner cranks the thermostat, the COP collapses and bills double. ### Oversized heat pump An oversized unit short-cycles, wears out compressors and underperforms in mild weather. The fix is correct heat-loss calculation, not bigger kit. ### Missed BUS grant deadline The £7,500 grant requires MCS certification, a heat-loss survey, EPC checks and grant submission inside specific windows. Miss them and you pay full price. ### Inadequate hot water cylinder ASHPs need an indirect cylinder with a much larger coil than a gas-fed cylinder. Reusing the old one means slow re-heat and disappointed showers. ### Lost BUS grant on resale An undocumented install can't transfer warranty or grant proof to a buyer, knocking thousands off resale value. ### Common mistakes we fix Treating ASHP like a boiler swapIt isn't. An ASHP is a designed system: heat-loss, emitter, pipework and control strategy must all be redesigned, not retrofitted. Refusing radiator changesAbout 60% of UK homes need 2–4 radiators upsized to run efficiently at 45°C. Skipping this is the #1 cause of post-install regret. Choosing on price aloneA £6,000 cheaper quote almost always means single-stage compressor, smaller refrigerant charge, lower SCOP and £400+/yr more in electricity for the next 20 years. Our Process ## A predictable, engineered process - STEP 01 ### Pre-survey & EPC check We confirm your EPC, current heating bills, fabric efficiency and BUS eligibility before we set foot in the house — saves you a wasted visit. - STEP 02 ### Full heat-loss survey Room-by-room measurement: u-values, window areas, air-change rates. We model the home in MCS-compliant software and design the system to specific outputs. - STEP 03 ### Design pack & BUS submission You receive a full design pack: heat pump model, cylinder spec, radiator schedule, pipework upgrades, SCOP estimate, predicted running costs, and the BUS grant application — submitted by us, not you. - STEP 04 ### Installation (typical 3–5 days) Outdoor unit on noise-mounted plinth, indoor cylinder and controls, pipework upgrades, radiator changes, full system flush, refrigerant charging, commissioning. - STEP 05 ### Handover, monitoring & aftercare Smart-control walkthrough, MCS certificate, BUS grant claimed and paid to you (or netted off the invoice), 12-month performance check, and remote monitoring on most units. Why it pays off ## Outcomes you can measure ### MCS install via accredited partner Heat pump installs are delivered via our accredited MCS partner installer, so you remain eligible for the £7,500 BUS grant. We don't currently process grant paperwork ourselves. ### Bills cut by up to 50% vs oil A well-designed ASHP running at SCOP 4.0 on the 7p Cosy Octopus tariff is around half the running cost of a 90% efficient oil boiler. ### Decarbonised home Up to 75% lower carbon emissions, climbing toward 100% as the UK grid greens further. ### No gas, no oil, no flues Free up an outhouse, reclaim a corner of the kitchen, and never take another oil delivery. ### Cooling-ready (where specified) Many models offer reversible cycle — gentle cooling in summer through the same emitters. ### Quieter than a fridge Modern inverter-driven units run at 40–48 dB at 1m — below conversation level. The Engineering Detail ## Under the bonnet We design every heat pump from first principles. Here's the engineering reality you need to know: ### How an ASHP actually works Refrigerant in the outdoor unit evaporates at very low temperatures, absorbing heat from outside air. A compressor pressurises the gas, raising its temperature. The hot refrigerant transfers heat to your central heating water via a plate exchanger, then expands and cools, repeating the cycle. The 'COP' is the ratio of heat delivered to electricity consumed. ### Brands we install Mitsubishi Ecodan, Daikin Altherma, Vaillant aroTHERM plus and Samsung EHS — all monobloc R32 or R290 units. We are accredited installers for each, meaning extended warranties and direct technical support. ### Sizing — the critical first decision MCS requires a room-by-room heat-loss calculation using actual u-values and CIBSE temperature data for the Darlington area. We size to peak demand at -2°C external (the regional design temperature) and verify against measured oil/gas consumption from your last 12 months. ### Emitter strategy ASHPs run most efficiently at flow temperatures of 35–45°C. Existing radiators sized for an 80°C gas boiler are typically 40–60% undersized at 45°C. We will quote upsized radiators or, where feasible, switch a downstairs zone to underfloor heating for the lowest flow temperatures and highest SCOP. ### Cylinder & hot water ASHPs require an indirect unvented cylinder with a high-surface-area coil (3.0–4.0 m²). We install 200–300L cylinders depending on household size and incorporate a weekly anti-Legionella cycle automatically. ### Tariffs and running cost Pair the install with Octopus Cosy or Intelligent Octopus, which give 7p/kWh during off-peak windows. We program the heat pump to charge hot water and pre-heat the home during cheap windows, dropping running costs by another 20–30%. ### Planning, noise & permitted development Most domestic ASHPs fall under permitted development rules provided the unit is >1m from boundary and below 0.6 m³ in volume. We model the noise at boundary using MCS-020 calculations — your neighbours never hear it. Recent Work ## Real installations, shown as completed Genuine project photography from across North Yorkshire — no stock imagery, no embellishment. Related Services - Renewables Installer - Underfloor Heating - Heating Engineer - Boiler Installation & Servicing - Contact Greencore Service Areas - ASHP installs in Darlington - ASHP installs in Richmond - ASHP installs in Northallerton - Back to homepage FAQ ## Honest answers to the questions we hear most Can't see your question? Call 07414 209357. How much does an air source heat pump cost? Will I really get the £7,500 grant? Will my radiators need changing? Does an ASHP work in cold North Yorkshire winters? How long does installation take? Is it noisy? Will it work with my existing hot water cylinder? What's the warranty? Can I have cooling too? What if I'm not insulated enough yet? ## Book your free heat-pump survey & BUS check Honest assessment. MCS-grade install delivered via our accredited partner. No commission-driven sales — just experienced engineers who design heat pumps that actually work in North Yorkshire homes. Request Fixed-Price Quote 07414 209357 Gas-Safe registered (214402) · Fully insured (£5m public liability) · 12-month workmanship guarantee Gas-Safe heating, renewables and bathroom specialists for homes across Darlington & North Yorkshire. 30 years on the tools. 07414 209357 07789 505532 info@greencoresolutionsltd.co.uk11 Chelsea Court, Marlborough Drive,Darlington, DL1 5YE Services - Boiler Installation & Servicing - Air Source Heat Pumps - Gas Safety Inspections - Underfloor Heating - Bathroom Installation - Renewables Installer Service Areas - Heating engineer Darlington - Boiler installer Middlesbrough - Heating engineer Stockton-on-Tees - Gas Safe engineer Durham City - Heating engineer Hartlepool - All North Yorkshire service areas Company - All services - Our work gallery - Customer reviews - About Greencore - Contact us - Privacy policy - Cookie policy - Terms & conditions Looking for a trusted Gas-Safe boiler installer in Darlington, an MCS air source heat pump installer in North Yorkshire or a complete bathroom fitter in Teesside? 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