How to Find an MCS-Certified Heat Pump + UFH Installer Near You (2026)
If you want to combine a heat pump with wet underfloor heating — and claim the £7,500 Boiler Upgrade Scheme (BUS) grant in the process — you need a very specific type of installer: one who holds MCS (Microgeneration Certification Scheme) accreditation for heat pump technology.
This isn't just a nice-to-have. Without an MCS-accredited installer, you cannot claim the BUS grant, your heat pump may not qualify for manufacturer warranty extensions, and your home insurance could be affected.
This guide explains what MCS is, how to find and verify a local MCS-certified installer, what questions to ask before hiring, and what a compliant heat pump + UFH installation should look like.
What Is MCS Accreditation?
MCS (Microgeneration Certification Scheme) is a UK quality assurance scheme for low-carbon energy technologies. Installers accredited by MCS have been independently audited against technical standards covering:
- System design and heat loss calculation methodology
- Equipment selection (using MCS-listed heat pump models)
- Installation quality and commissioning procedures
- Ongoing monitoring and fault diagnosis
MCS is not a trade membership you can join by paying a fee — it requires passing technical assessments and maintaining ongoing compliance. The scheme is overseen by the Department for Energy Security and Net Zero (DESNZ).
Why it matters for your project:
- Only MCS-accredited installers can apply for BUS vouchers via the Ofgem portal
- An MCS certificate (issued after installation) is required to release the £7,500 grant
- Many heat pump manufacturers require MCS installation for full warranty validity
- Home insurers may require evidence of MCS-compliant installation for complex heating system claims
What Credentials Should a Heat Pump + UFH Installer Hold?
A properly qualified installer for a combined heat pump + wet UFH project will typically hold several credentials:
| Credential | Purpose | Required? |
|---|---|---|
| MCS accreditation (heat pumps) | Unlocks BUS grant; quality assurance | Essential |
| Gas Safe registration | Decommissioning existing gas boiler | Required if gas boiler being removed |
| CIPHE or APHC membership | Wet UFH pipework and plumbing | Recommended |
| Manufacturer training certificates | Brand-specific installation compliance | Recommended |
| Public liability insurance (£2m+) | Protection if something goes wrong | Essential |
Important: MCS accreditation and Gas Safe registration are separate credentials held by the same business (or different subcontractors on the same job). Confirm both are in place before signing a contract.
How to Find MCS-Certified Installers Near You
1. Search the MCS Installer Database
The most authoritative source is the official MCS installer database at mcscertified.com/find-an-installer. You can search by:
- Postcode (to find local installers)
- Technology type (select "Air Source Heat Pump" or "Ground Source Heat Pump")
- Company name
Every MCS-accredited installer on the database has a unique MCS licence number and shows their certification status and expiry date.
2. Use a Verified UFH Directory
Our UFH installer directory lists verified local professionals across the UK. When contacting installers from the directory, ask specifically: "Are you MCS-accredited for air source or ground source heat pump installation?" — and request their MCS licence number to verify on mcscertified.com.
3. Check Trade Association Networks
The following trade bodies have member directories where MCS-accredited installers are common:
- CIPHE (Chartered Institute of Plumbing and Heating Engineering) — ciphe.org.uk
- APHC (Association of Plumbing and Heating Contractors) — aphc.co.uk
- HIES (Heat Pump Association) — heatpumps.org.uk
4. Ask Your Boiler Service Engineer
If you have an existing Gas Safe registered heating engineer who services your boiler, ask whether they hold MCS accreditation or can refer you to a trusted MCS installer. Many established heating companies have expanded into heat pumps and hold dual credentials.
How to Verify MCS Accreditation in 3 Minutes
Before hiring any installer, verify their MCS status:
- Ask the installer for their MCS licence number — this is a unique reference like
MCS/H/XXXXXX - Go to mcscertified.com/find-an-installer
- Search by licence number or company name
- Check the result shows:
- Active/current status (not expired)
- Heat pump technology listed (ASHP or GSHP as relevant)
- Company name matches who you're dealing with
If they won't provide a licence number, or the number doesn't verify, do not proceed. This is a non-negotiable check.
10 Questions to Ask an MCS-Certified Heat Pump + UFH Installer
Before committing to any installer, ask these questions:
- What is your MCS licence number, and can I verify it on mcscertified.com?
- How many heat pump + UFH systems have you installed in the past 12 months?
- Will you conduct a full heat loss calculation before sizing the system? (Required by MCS standards — any installer who skips this is a red flag)
- Which heat pump brands do you install, and why? (Look for installers who stock more than one brand and can recommend the right fit for your property)
- What flow temperature will you set the system to run at, and how does that affect COP? (A knowledgeable installer will explain the relationship between flow temp, heat pump efficiency, and UFH design)
- Will you handle the BUS voucher application on my behalf? (They should — it's standard practice)
- What warranty does the heat pump carry, and does MCS installation affect it?
- What warranty do you offer on your installation workmanship?
- Are you Gas Safe registered? (If decommissioning a gas boiler)
- Can you provide references from customers who've had heat pump + UFH installed in properties similar to mine?
Red Flags to Watch For
Not all installers claiming MCS credentials are operating to the same standard. Watch for:
- No heat loss survey offered — undersized heat pumps are the single biggest cause of poor performance. Any installer who quotes without surveying is guessing.
- Only one heat pump brand available — suggests they're a tied agent, not an independent adviser
- BUS application "not their problem" — legitimate MCS installers handle this as standard
- Vague on flow temperature and COP — these are fundamental — a competent installer should discuss them naturally
- No written specification — a proper heat pump + UFH quote should include system design details, pipe layout, heat pump model, manifold specification, and commissioning plan
- Pressure to sign quickly — BUS vouchers expire after 3 months, but a legitimate installer will allow reasonable decision time
What a Compliant Heat Pump + UFH Design Looks Like
A correctly designed heat pump + wet UFH system will specify:
Heat pump sizing: Based on a full heat loss calculation (MCS standard requires this). For most UK homes, an ASHP between 6kW and 14kW is typical.
Flow temperature: Typically 35–45°C for UFH — much lower than radiator systems. The installer should confirm the heat pump's COP at your target flow temperature.
UFH pipe spacing: Tighter pipe centres (150–200mm) maximise heat output at low flow temperatures. Wider spacing reduces performance. This is the hidden quality gate of any heat pump + UFH installation: MCS certification validates the process (heat loss calc, equipment selection, commissioning sign-off), but pipe spacing per zone is where the efficiency promise is either kept or broken in practice. Weather compensation controls — which automatically lower flow temperature as outdoor temperature rises, the key to heat pump efficiency — can only function correctly if the manifold is delivering the right heat output per zone. Wrong spacing means poor performance that no amount of paperwork fixes. When interviewing installers, ask specifically: "How do you determine pipe spacing per zone relative to the design flow temperature?" A vague answer here indicates MCS accreditation on paper without rigour in practice.
Manifold configuration: Each zone of UFH (room or floor area) is controlled via a manifold. Zoned control allows different temperatures in different rooms and is required for efficient heat pump operation.
Controls integration: Heat pump controllers and UFH thermostats should be configured to work together. Many modern ASHPs include weather compensation controls that automatically adjust flow temperature based on outdoor temperature — this is highly efficient with UFH.
Typical Cost: Heat Pump + Wet UFH Installation
| Component | Typical Range | After £7,500 BUS Grant |
|---|---|---|
| Air source heat pump (6–12kW installed) | £8,000–£14,000 | £500–£6,500 |
| Whole-house wet UFH (new build, 100m²) | £7,000–£11,000 | — |
| Whole-house wet UFH (retrofit overlay, 100m²) | £10,000–£16,000 | — |
| Total (new build example) | £15,000–£25,000 | £7,500–£17,500 |
For properties eligible for ECO4 insulation grants, further savings of £2,000–£8,000 are possible on insulation upgrades.
Frequently Asked Questions
Is MCS accreditation different from Gas Safe registration? Yes — they are completely separate credentials. Gas Safe covers gas appliance work (fitting and decommissioning gas boilers). MCS covers low-carbon technologies (heat pumps, solar). A heat pump + UFH project where a gas boiler is being removed requires both.
Can I use the BUS grant without wet underfloor heating? Yes — the BUS grant is for the heat pump, not the UFH. However, pairing a heat pump with radiators rather than UFH significantly reduces heat pump efficiency. You'll get better running costs and a faster payback period with UFH.
How long does MCS accreditation take to verify? The mcscertified.com database is live — verification takes under 2 minutes with the installer's licence number.
What happens if an MCS installer loses accreditation after they've done my install? Your MCS installation certificate remains valid. The BUS grant (already paid) is unaffected. However, your manufacturer warranty terms may be affected — check the specific terms with the manufacturer.
Do all heat pump models qualify for BUS? Only heat pump models on the MCS Product Characteristics Database (PCDB) qualify. All reputable brands (Mitsubishi, Daikin, Vaillant, Samsung, Nibe, Viessmann) have models on the database. Your installer should confirm the specific model is listed before quoting.
Find MCS-Certified Installers in Your Area
Use our directory to browse verified local UFH installers — and confirm MCS accreditation before requesting quotes.
- Installers in London
- Installers in Manchester
- Installers in Birmingham
- Installers in Leeds
- Installers in Bristol
- Installers in Sheffield
- Browse all locations
Or submit a quote request and we'll match your project with local MCS-accredited professionals.