Heating, Ventilation & Air Conditioning Feature


Heating, Ventilation & Air Conditioning 45 MVHR: The missing link


Craig Cundey at Ubbink UK explains why MVHR systems are the missing link in delivering healthy, future proof social housing for both new build and retrofi t.


A


s housing associations and local authorities continue to face mounting pressure to improve building performance, reduce fuel poverty, and eliminate the scourge of damp and mould, one technology stands out


as quietly transformative: Mechanical Ventilation with Heat Recovery (MVHR). Far from being a luxury self-build system, MVHR represents a practical,


regulatory-compliant and resident-focused solution that addresses several of the most persistent challenges in social housing. In the context of tightening environmental targets, Awaab’s Law and new funding opportunities under the UK Government’s Warm Homes Plan, MVHR is no longer optional; it’s essential. Damp and mould are not merely cosmetic issues. T e tragic case that led to


Awaab’s Law brought into focus how serious poor ventilation can be for social housing tenants, particularly for families and vulnerable individuals. MVHR systems directly tackle the underlying problem by continuously extracting moist stale air while replacing it with fi ltered fresh air. Unlike traditional extractor fans or trickle vents, MVHR ensures constant air


exchange across the entire dwelling. T e eff ect is that the buildup of humidity and condensation is drastically reduced, helping to prevent the growth of mould spores from the outset. At the same time, MVHR improves indoor air quality by fi ltering out pollutants and allergens therefore contributing to better respiratory health and overall wellbeing of the occupants. As homes become more airtight through retrofi t and insulation upgrades,


traditional forms of ventilation are becoming insuffi cient. MVHR bridges this gap by maintaining a healthy indoor environment without sacrifi cing energy effi ciency. T ese systems recover up to 95% of the heat from extracted air and use it to warm incoming air, reducing energy bills by 20-30%, based on research and real-life projects, particularly valuable for tenants facing fuel poverty. For landlords and local authorities, MVHR plays a critical role in improving


energy performance ratings (EPC), helping housing stock reach the targeted Band C under the Warm Homes: Social Housing Fund (formerly SHDF). Recent regulation has set a clear expectation that landlords must ensure


homes are free from damp and mould hazards, with ventilation systems always functioning properly. To comply with Awaab’s Law and the Decent Homes Standard, landlords and occupants must adhere to maintenance schedules such as fi lter checks every three to six months either conducted by the occupant or landlord, annual professional servicing and full system re-commissioning every few years. An MVHR system when maintained correctly provides a reliable framework for compliance. One of the most frequent concerns raised by housing managers is the space


required to install MVHR, particularly in existing housing stock. However, manufacturers are responding with smart, more compact designs suitable for retrofi t in social housing and smaller properties including fl ats and apartments. For instance, smaller units from manufacturers are designed to fi t neatly


inside kitchen cupboards a game changer for developments where internal space is at a premium. Decentralised systems, which serve individual rooms like kitchens and bathrooms have also proven highly eff ective where central ducting is not practical. T ese innovations enable fl exible installation without major disruption, making ventilation upgrades feasible even in occupied homes.


Successful MVHR implementation relies on careful planning and resident involvement


Government funding has created a golden opportunity for social housing


providers to include MVHR within broader retrofi t programmes. Under the Warm Homes Plan (2026) and subsequent funding waves, MVHR qualifi es for support as a core energy-effi ciency measure. Key schemes include: • Warm Homes: Social Housing Fund (WH:SHF) – the main vehicle for upgrading social housing to EPC Band C, with £1.29bn allocated between 2025 and 2028


• ECO4 Scheme – open until 2026, supporting innovation measures and upgrades for lower-rated dwellings (EPC D-G)


• National Wealth Fund (NWF) – providing up to £1.65bn in guaranteed lending for social housing improvements


• Local Authority Grants – councils including Wandsworth and Greenwich have introduced supplementary funding for ventilation and energy performance measures.


Successful MVHR implementation relies on careful planning and resident involvement. Before installation, a ventilation survey should assess airfl ow paths, property constraints, and compatibility with existing heating systems. Combining MVHR with insulation and heating upgrades yields the best results enhancing both comfort and energy performance. Post installation engagement is crucial, providing tenants with clear instructions ensures the system is used eff ectively avoiding issues such as blocked vents or unused controls. For local authorities and housing associations, MVHR off ers a practical


route to achieve multiple goals simultaneously: healthier homes, lower carbon emissions, happier residents, and regulatory compliance. It complements the decarbonisation agenda while responding directly to the urgent public health concerns that continue to dominate housing policy for both new build and retrofi t. As social landlords step forward to deliver future ready housing, MVHR


stands as one of the most eff ective tools to ensure that every tenant can live in a home that is safe, warm, and dry – today and for decades to come.


Craig Cundey is the ventilation product lead at Ubbink UK Housing Management & Maintenance Spring 2026


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