Heat-loss model
Room-by-room CIBSE-compliant heat-loss calculation at the local design temperature, with U-values, infiltration, and ventilation losses itemised. Provided as a written report, not just a spreadsheet line.
Cheshire's Specialist UFH Service
Independent design and specification for underfloor heating and air source heat pump systems, for architects, developers, M&E consultants, and self-build clients who need engineering reality, not a manufacturer's marketing brochure.
5.0 ★ Google · Independent specification · Manufacturer-agnostic
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Overview
Independent UFH and heat pump consultancy means specification by an engineering team that has no manufacturer commission to chase and no preferred-supplier discount that needs hiding. We model heat loss, design the system, specify the plant, write the controls architecture, and issue a tender-ready specification, usable to put the install out to competitive bid, or to brief an in-house contractor.
We work with Cheshire architects, M&E consultants, custom-build developers, and demanding self-build clients who want a heating specification they can defend at planning, at building control, at handover, and at the first-winter review. Specifications stand up to manufacturer scrutiny.
If you are at design stage on a self-build, leading a refurbishment that needs the heating reconsidered from first principles, or reviewing a specification someone else has produced and want a second opinion, this is what we do. Most consultancy fees are between £900 and £4,500 depending on scope, paid for in the install cost saving on the average project.
The Cost of Getting It Wrong
A weak specification produces a weak installation regardless of how good the contractor is. We are routinely asked to bail out projects where the design was inadequate from the start, by which point the slab is poured, the heat pump is chosen, and the options are expensive.
Heat pump or boiler picked from the manufacturer's headline output, not from a project-specific heat-loss model. Result: oversized plant, short-cycling, premature failure, voided warranty.
Loose specification means every contractor reads it differently. Comparing returns becomes impossible, and the cheapest bid usually delivers the most expensive lifetime cost.
Architects who specify mechanical systems from a manufacturer's data sheet inherit the risk when it underperforms. Independent specification moves that risk where it belongs.
Specifying plant by manufacturer name without project-specific sizing, common on small-developer schemes.
Leaving controls and BMS scope to the contractor's preference, with predictable variation in install quality.
Ignoring weather compensation and flow-temperature design, the single biggest factor in lifetime operating cost.
Specifying insulation thinner than the heat-loss model demands to hit a build cost, undermining the entire system.
Treating UFH and the heat source as separate specifications, then watching them not match at second fix.
Our Process
Every project is handled by the same engineers, from first survey through final commissioning, and we're the team you'll call for service for the lifetime of the system.
Architect's drawings, structural detail, glazing and insulation spec, client brief. We identify what's missing before we start work.
Room-by-room CIBSE-compliant heat-loss model. Heat-pump feasibility, emitter sizing, plant location options, controls architecture.
Tender-ready specification: UFH pipework, manifolds, controls, heat source, plant room layout, commissioning standard. Independent of brand where you want it.
Bid analysis, contractor interviews, value engineering review. We help you compare like-for-like, not apples-with-oranges.
Site visits during install, commissioning witness, defects review. Optional but recommended on higher-spec projects.
What You Gain
No hidden commissions, no preferred supplier, no kickbacks. The specification serves the project, not the supply chain.
Spec stands up at planning, building control, contractor tender, and first-winter review.
Detailed enough that bids return comparable. Average client saves 8–20% on tendered install cost, typically far more than our fee.
Designed at the low flow temperatures heat pumps actually need to perform. Future-proof regardless of current heat source choice.
Drawings issued in formats your architect can co-ordinate. Attendance at design team meetings on request.
We can also act as your engineer on the install, witness commissioning, sign off compliance, manage defects. Adds an audit layer where the project warrants it.
Technical Detail
There's a wide gap between a one-page 'recommended specification' from a manufacturer rep and a full engineering specification. Here is what's in a typical BHL package for a 4–6 bedroom Cheshire self-build.
Room-by-room CIBSE-compliant heat-loss calculation at the local design temperature, with U-values, infiltration, and ventilation losses itemised. Provided as a written report, not just a spreadsheet line.
Pipe-layout drawings per floor, pipe pitch per room, manifold positions and zone schedule, flow temperatures, blending valve specification, expansion vessel sizing, fill and pressure regime.
ASHP model selection with manufacturer-agnostic options, sizing rationale, position with acoustic modelling, condensate routing, electrical supply requirements, BUS grant compliance check.
Controller schedule, thermostat locations, wiring centre layout, weather compensation regime, app integration scope, BMS interface where applicable.
Cure cycle protocol, pressure-test regime, balancing standard with documented per-loop flow rates, O&M pack scope, training scope for end-user.
Domestic spec prioritises per-room comfort, low-temperature heat-pump compatibility, and family-friendly controls. Commercial spec adds BMS, footfall modelling, multi-zone control, and FM-ready documentation. We deliver both.
FAQs
The questions Cheshire homeowners and contractors ask us most before a job. If yours isn't here, call 0161 531 1141, we'll answer it plainly.
Ideally RIBA Stage 3, once the floor plan is settled but before the slab and insulation are detailed. Earlier is fine. Later means you are reacting to decisions rather than informing them.
Typical self-build feasibility and specification: £900–£2,500. Full design + tender support: £2,500–£4,500. Developer schemes priced per project. Fixed fee, no day rates, deliverables defined upfront.
Yes, and we do regularly. The specification is yours to tender competitively, and we will not weight it to favour ourselves. Many clients use us for spec and then tender to multiple contractors including us.
We work alongside architects, M&E consultants, structural engineers, and main contractors regularly. Drawings issued in CAD or PDF as preferred, meeting attendance on request.
Yes, every heat-pump specification we produce is MCS-compliant and BUS-grant eligible. Documentation is provided in the format the grant application requires.
Yes, independent spec review is a common engagement. Typical fee £450–£900 depending on scope. We provide a written second opinion with specific recommendations.
Same approach. We assess existing buildings, model heat loss against the actual fabric, and produce a retrofit specification that respects what's already there. Common engagement for listed and period properties.
Yes, small to mid-sized commercial schemes (offices, showrooms, restaurants, salons) up to around 2,500 m² floor area. Larger schemes referred or partnered as appropriate.
We are. Specifications are issued, signed and stand behind us, with manufacturer data and CIBSE-based heat-loss modelling underpinning every recommendation.
Related Services
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View detailAreas We Serve
Your Next Step
Send us your drawings and brief. We'll respond with a fixed-fee proposal for the specification package, typical turnaround five to ten working days from receipt.
MCS Accredited · NAPIT Registered · RECC Member · Gas Safe