Air source heat pumps (ASHP)
Monobloc R32 / R290 units, sized to MCS heat-loss surveys, with weather-compensated controls and matched indirect unvented cylinders. We install Mitsubishi Ecodan, Vaillant aroTHERM plus, Daikin Altherma and Samsung EHS.
Service · North East England
Renewables Installer in Darlingtonand the North East —heat pumps, solar thermal, low-carbon heating
MCS-grade design and installation of air source heat pumps, solar thermal, hybrid systems and high-efficiency hot water cylinders — engineered to cut your bills, qualify for grants, and meet the UK's net-zero pathway without compromising comfort.
MCS-grade (via partner) · MCS install via partner · 30+ years heating engineering
MCS
Certified installer
£7,500
MCS install via partner
30+ yrs
Heating engineering
Free
In-home renewables survey
7 yr
Manufacturer warranty
Service Overview
What you need to know
What it is
Renewables installation covers the design, supply and commissioning of low-carbon heating: air source and ground source heat pumps, solar thermal (hot water), hybrid heat pump + boiler systems, and the unvented cylinders and smart controls that tie them together.
Who it's for
Homeowners replacing oil, LPG or older gas heating; homeowners with south- or west-facing roofs adding solar thermal to cut hot-water bills; self-builders specifying low-carbon from the outset; and landlords future-proofing rental yield against tightening MEES rules.
When you need it
At end of life of an existing system, during a major refurbishment, at new build first-fix, or whenever the next round of energy price changes makes the maths obvious.
Why professional matters
Renewables aren't a single product — they're a system. Specifying the wrong cylinder, undersizing emitters, missing grant deadlines or installing without MCS all kill performance and payback. Greencore's 30-year heating background makes the difference between a renewables system that works on paper and one that works in your home, in February, at 2 am.
What it costs to delay
The real consequences of putting it off
Renewables done badly are worse than no renewables. Here's what we routinely come in and fix:
Wrong-sized heat pump
Oversized units short-cycle; undersized units never reach setpoint. Either way, the bill is 30–50% higher than the homeowner was promised.
Missed grant windows
The Boiler Upgrade Scheme has strict eligibility and submission rules. A missed step costs you £7,500.
Solar thermal scaled wrong
Panels too big, cylinder too small, no overheat protection — leads to stagnation, glycol degradation and panel failure.
No fabric assessment
Renewables on a draughty house are throwing money out of windows. We always assess fabric first and tell the truth.
Lost warranty
Non-MCS installs can't access most manufacturer warranty extensions and can't claim BUS funds.
Common mistakes we fix
Buying the panels first
The system should be designed before the kit is bought. We see homeowners with garages full of orphaned panels they bought 'on offer'.
Treating ASHP and solar as alternatives
They're complementary. Solar thermal cuts the hot-water demand a heat pump has to satisfy — saving 30%+ in summer running costs.
Skipping the cylinder
A modern ASHP or solar thermal demands a properly specified unvented cylinder with a high-performance coil. Reusing the old one is the #1 cause of poor performance.
Our Process
A predictable, engineered process
- STEP 01
Free renewables consultation
We look at your home, your bills, your EPC and your goals. No commitment, no commission-driven sales — just a clear view of what's possible.
- STEP 02
Fabric & heat-loss assessment
Insulation, glazing, air-tightness, room-by-room heat loss. We won't install a system you don't have the fabric to support.
- STEP 03
System design & grant submission
Full MCS-compliant design pack: ASHP/solar/hybrid spec, emitter schedule, cylinder, controls, SCOP/SAP modelling,
- STEP 04
Installation by our own team
Greencore engineers do the install — outdoor unit, cylinder, pipework, emitter upgrades, controls — typically 3–7 days depending on scope.
- STEP 05
Commission, monitor, support
MCS commissioning certificate, smart-control handover, 12-month performance review and ongoing remote monitoring.
Why it pays off
Outcomes you can measure
Honest renewables advice
BUS grant scheme (£7,500 for heat pumps) is available — we'll point you to the application process, though we don't currently handle grants ourselves.
Cut bills by 30–50%
Well-designed heat pumps on off-peak tariffs typically halve oil-heating costs. Solar thermal can cover 60% of annual hot water demand.
Lower carbon footprint
Up to 75% lower CO₂ versus oil. As the grid greens further, the gap widens.
MCS-grade (via partner) peace of mind
Our certification protects your warranty, your grant, and your home's resale value.
Quiet, automated, hands-off
Modern systems run silently in the background with smart controls. You set it once, the system optimises.
Future-proofed home
Already aligned with future Boiler Upgrade Scheme rules and incoming low-carbon heating mandates.
The Engineering Detail
Under the bonnet
Renewables is where heating engineering meets energy strategy. Here is the technical depth we bring:
Ground source heat pumps (GSHP)
For larger rural properties with land for slinkies or borehole capacity. SCOPs of 4.5+ when properly designed. Higher capital, lower running. We partner with accredited drilling contractors and handle the heating side end-to-end.
Solar thermal (hot water)
Flat plate or evacuated tube panels feeding a dual-coil cylinder. Best paired with families using a lot of hot water (4+ people, baths/showers daily). Sized to deliver 60% of annual hot water demand without overheating in summer.
Hybrid systems
ASHP for base load and the boiler for peak/defrost cycles. Ideal for older or harder-to-heat properties where a heat-pump-only design would require significant fabric upgrades. The hybrid runs on the cheaper of gas or electricity at any moment, automatically.
Cylinders & buffer tanks
Modern indirect unvented cylinders with 3.0–4.0 m² coils, expansion provision and Legionella cycle. Buffer tanks for very small homes or where multi-zone management requires hydraulic separation.
Smart controls
Weather compensation, load compensation, zone control, occupancy detection, tariff optimisation. Open APIs into Octopus Energy and Loop for tariff-aware operation. We build systems that get smarter, not dumber, over time.
Grants & funding pathways
BUS £7,500 for heat pumps (we handle); HUG2 means-tested funding for off-grid low-income homes (we'll advise); ECO4 referrals where appropriate; 0% VAT on most domestic renewables installs through 2027.
Book your free renewables consultation
Honest, MCS-grade (via partner) advice. No commission-driven sales. MCS install delivered via accredited partner. 30+ years of heating engineering behind every design.
Gas-Safe registered (932261) · Fully insured (£5m public liability) · 12-month workmanship guarantee