Modern UK homes are tighter than ever. Higher insulation, sealed window frames, airtight membranes and Part L energy targets have driven air permeability rates down dramatically — and that's great news for heating bills, but trouble for indoor air. Without a proper ventilation strategy, moisture, CO2, cooking pollutants and volatile organic compounds (VOCs) build up. That's exactly the problem Vectaire has been solving for British homes since 1987.
Vectaire is a UK manufacturer based in High Wycombe with over thirty years in the air-movement industry. Their range of ventilation systems covers everything from single-room extract fans to whole-house mechanical ventilation with heat recovery (MVHR) — and, more recently, the Cool Breeze R290 cooling module that has reshaped what an MVHR can do during a British heatwave.
Why ventilation matters in modern UK homes
Part F of the UK Building Regulations is unambiguous: any dwelling with an air permeability rating below 3 m³/h·m² at 50 Pa requires mechanical ventilation. That covers virtually all new builds and most deep retrofits. The reasoning is simple — a sealed home cannot breathe on its own.
Moisture and condensation control
Cooking, washing, drying and even breathing release several litres of water vapour into a home every day. MVHR continuously extracts this moisture before it condenses on cold surfaces — the root cause of mould growth.
Filtered fresh air supply
Outside air is drawn in through G3 or G4 filters that trap pollen, dust and larger particulate matter before it reaches living spaces — a continuous benefit for households sensitive to airborne pollen or urban traffic dust.
Removes indoor pollutants
Cooking, cleaning products, new furniture and building materials release VOCs and odours. Continuous extract ventilation removes these at source rather than allowing them to accumulate in living areas.
Recovers up to 92% of the heat
Unlike a trickle vent or open window, MVHR doesn't throw your heating bill out with the stale air. A counter-flow heat exchanger transfers warmth from outgoing air to incoming fresh air — without mixing the two streams.
The Vectaire MVHR range
Vectaire's whole-house heat recovery range is designed around real UK property archetypes — from compact flats to large detached homes — and every unit is SAP Q eligible and manufactured in the UK to ISO 9001:2015 and ISO 14001:2015 standards.
WHHR Mini DC
Continuous low-level ventilation for a kitchen and one additional wet room. Loft or void installation, with up to 83% heat recovery via a counter-flow heat exchanger and a low-energy EC motor.
- Integral proportional humidistat
- Automatic summer bypass
- Boost timer and BMS connections
WHHR Midi / Midi Plus
Continuous ventilation for kitchens with up to six other wet rooms. Up to 94% heat exchange efficiency via counter-flow exchanger and an EC brushless motor with specific fan power (SFP) down to 0.50 W/l/s.
- Cupboard, loft or false-ceiling install
- Universal handing for left/right ducting
- SAP Q eligible — PCDB listed
Maxi MVHR
The workhorse of the range. Continuous ventilation for kitchen plus up to eight wet rooms, with up to 92% heat exchange efficiency and an SFP from 0.40 W/l/s. The acoustically attenuated Maxi-BY-AT variant is specified where breakout noise matters — bedrooms above plant cupboards, apartments, hotels.
- Summer bypass with adjustable setpoints
- Proportional frost-stat (+8 °C to −3 °C)
- Integral humidistat option
Maxi Plus MVHR
For larger detached homes, executive new builds and multi-bathroom layouts. Continuous ventilation with up to 89% heat recovery and the option to pair with the Cool Breeze Plus cooling module for whole-home temperature control without external condensers.
- Designed for properties up to 400 m²
- Vertical or horizontal orientation options
- Acoustic AT variant available
| Vectaire Model | Typical Property | Heat Recovery | Install Position | Key Feature |
|---|---|---|---|---|
| WHHR Mini DC | Flat / 1-bed home | Up to 83% | Loft or void | Compact low-flow unit |
| Midi / Midi Plus | 2–4 bed home | Up to 94% | Cupboard / loft | Highest efficiency in range |
| Maxi | 3–5 bed up to 250 m² | Up to 92% | Wall or loft | SAP Q eligible workhorse |
| Maxi-BY-AT | Apartments / acoustic-critical | Up to 92% | Wall or loft | Integral acoustic attenuation |
| Maxi Plus | Up to 400 m² detached | Up to 89% | Vertical or horizontal | Pairs with Cool Breeze Plus |
Why ventilation matters even more in a heat pump home
Heat pumps and MVHR systems were practically designed for each other. Both rely on the same foundational principle: a well-insulated, airtight building envelope where every kilowatt of heat is precious. Skip the MVHR and you undermine the heat pump.
Recovering up to 92% of waste heat from extracted air means the heat pump runs less often and at lower flow temperatures — directly improving SCOP and cutting electricity consumption.
A heat pump emits heat at lower flow temperatures than a gas boiler. Cold incoming air from open windows or trickle vents ruins the comfort calculation. MVHR delivers tempered, pre-warmed fresh air all year.
The UK's Future Homes Standard pushes new builds towards heat pumps with very low air permeability targets. MVHR is one of the few compliant ventilation routes for these airtight, low-carbon dwellings.
Vectaire's Cool Breeze and modern UK heat pumps like Baxi's HP60 and Vaillant's aroTHERM Plus use R290 (propane) with a GWP of 3 — over 225 times less impactful than R32, and compliant with 2027 F-Gas rules.
Heat pumps that pair beautifully with Vectaire MVHR
The three UK-available heat pumps below sit on the same low-carbon roadmap as Vectaire's MVHR range — high seasonal efficiency, low-GWP refrigerants where possible, quiet operation suitable for tight urban gardens, and integration into the kind of fabric-first home that needs MVHR to function properly.
HP60 R290 High-Temperature ASHP
Seven outputs from 4 to 13 kW with R290 (propane) refrigerant, GWP 3. SCOP up to 5.34, A+++ ErP rated, 75 °C flow temperatures and class-leading 48 dB(A) sound power — ideal for retrofits where existing radiators stay in place.
From £3,390 inc. VAT
EHS Mono R32 12 kW ASHP
Compact monobloc unit engineered for larger homes and small commercial use. Hot water to 65 °C, operates down to −25 °C ambient, SCOP 4.53, ErP A+++ at 35 °C. Quiet (<48 dB(A)) and MCS-listed for Boiler Upgrade Scheme grants.
£3,300 inc. VAT
aroTHERM Plus 7 kW ASHP
Vaillant's flagship R290 monobloc, awarded Quiet Mark for ultra-low 54 dB(A) sound power. SCOP up to 5.03, A+++ rated, flow temperatures to 75 °C and a low-GWP refrigerant matching Vectaire Cool Breeze — perfect for new builds with MVHR.
View pricing online
Browse the full range of air source heat pumps at Quality Heating, or get specification help via our heat pump buying guide.
Cool Breeze: the UK answer to overheating
British summers have changed. CIBSE TM59 overheating risk assessments and Approved Document O of the Building Regulations now require new dwellings to demonstrate they won't overheat — a problem made worse by the very airtightness that helps a heat pump perform. Vectaire's response is Cool Breeze: a self-contained R290 cooling module that plugs into the Maxi or Maxi Plus MVHR and uses the existing duct network to distribute pre-cooled air through the home.
There is no external condenser, no condenser unit on the garden wall, no F-Gas pipework crossing the building envelope. The Cool Breeze sits next to the MVHR, removes heat from the incoming fresh air supply, and lets the MVHR do the distribution work. The result is whole-home temperature control delivered through ductwork that's already there.
Why Cool Breeze suits UK homes specifically
Plenty of cooling solutions exist. What makes Cool Breeze unusual is that it was engineered around the constraints of a typical British property and the UK's regulatory landscape rather than retrofitted from a continental air-conditioning playbook.
No external condenser unit
Planning constraints, leaseholds, conservation areas, terraced homes with no garden — many UK properties simply can't fit a wall-mounted condenser. Cool Breeze is self-contained: everything sits indoors next to the MVHR.
Right-sized for the UK summer
UK overheating peaks are short, intense and humid — not month-long Mediterranean heatwaves. 4.1–4.3 kW of cooling distributed through MVHR ductwork takes the edge off a 30 °C afternoon without the running cost of a multi-split AC system.
R290 natural refrigerant
Compliant with 2027 F-Gas restrictions and over 225 times less harmful than R32. The same refrigerant family used in Baxi's HP60 and Vaillant's aroTHERM Plus — one coherent low-carbon story across heating and cooling.
Meets CIBSE TM59 & Approved Document O
Both Cool Breeze and Cool Breeze Plus are designed to help dwellings demonstrate compliance with the UK's overheating regulations — an increasingly common pass/fail item on planning applications for flats and high-glazing new builds.
Quiet integral condenser
Wall or floor mounted internally, with the integral condenser specifically designed for very quiet operation — suitable for installation near sleeping areas, unlike a typical garden-mounted AC outdoor unit.
Smart integral sensing
The Cool Breeze monitors both room temperature and incoming fresh air temperature via an integral sensor. No false activation from a poorly sited external thermostat — cooling kicks in only when it's genuinely needed.
Health benefits backed by UK building regulations
Indoor air quality has become a building regulation matter rather than an optional comfort upgrade. Approved Document F of the Building Regulations was rewritten in 2022 explicitly to address the indoor air quality consequences of increasingly airtight homes. The health framing below reflects what the regulations themselves recognise — not unverified claims.
Continuous removal of indoor pollutants
Cooking, cleaning agents, paints, adhesives and new furniture all release volatile organic compounds. Continuous mechanical extract ventilation removes these at source rather than allowing concentrations to build up in occupied spaces — a key reason Approved Document F mandates mechanical ventilation in airtight dwellings.
Filtration of incoming air
Vectaire MVHR units use replaceable G3-grade filters as standard, with higher grades available, to capture pollen, dust and larger particulate matter from the outdoor air supply before it enters living spaces — particularly relevant for homes in urban or high-pollen environments.
Condensation and mould prevention
Persistent damp and mould are explicitly recognised in UK statutory guidance as a hazard to occupant health. By removing moisture-laden air from kitchens and bathrooms before it can condense on cold surfaces, MVHR addresses the root cause rather than treating the visible symptom.
Sleep quality without open windows
MVHR delivers continuous filtered fresh air to bedrooms with windows closed — reducing exposure to traffic noise, urban particulates and seasonal pollen at night, all of which can disturb sleep. Acoustic Maxi-BY-AT variants further reduce ventilation breakout noise.
Note: this article describes regulatory and engineering benefits of mechanical ventilation. Vectaire ventilation systems are not medical devices and do not diagnose, treat or cure any condition. Householders with specific respiratory or allergy concerns should always seek advice from a qualified medical professional.
Why this matters for house builders, developers & housing associations
Vectaire's ventilation range is specified across new build, retrofit and social housing precisely because the combination of UK regulation, airtight construction and the heat pump rollout has created a problem that needs to be solved properly — not bypassed with trickle vents and hope.
New build housing developers
Future Homes Standard new builds are highly airtight and almost universally heat-pump-heated. Vectaire MVHRs are SAP Q listed and PCDB registered, giving SAP assessors known input data. Cool Breeze provides the compliance path for Approved Document O overheating assessments without external condensers cluttering elevations.
Retrofit and deep renovation projects
External wall insulation, airtight membranes, replacement windows — any of these can push a property below the 3 m³/h·m² Part F threshold. The Maxi range's wall, loft and cupboard mounting options make retrofitting MVHR feasible in homes that weren't designed for it.
Housing associations & social housing
Damp and mould remediation became a statutory priority following Awaab's Law. MVHR addresses the underlying moisture problem rather than treating its surface symptoms, supporting compliance with the strengthened decent homes standard and reducing repeated callouts for mould treatment.
Apartments & multi-occupancy buildings
Vectaire's acoustically attenuated Maxi-BY-AT and Maxi-Plus-BY-AT variants are designed for stacked dwellings where ventilation plant noise breakout is a planning concern. Cool Breeze offers cooling without per-flat external condensers — a major advantage in dense urban schemes.
UK manufacturing & trust signals
Vectaire designs and manufactures all of its MVHR range in High Wycombe to a stack of independently audited standards. That matters when a unit needs to run quietly, continuously, for the 20+ year design life of a modern UK home.
Ready to specify a Vectaire ventilation system?
Whether you're a homeowner planning a renovation, an installer working on a heat pump retrofit, or a developer specifying a new build, our team can help match a Vectaire MVHR (and Cool Breeze where overheating compliance is needed) to your project alongside the right heat pump.
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