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CPD Resource

MVHR Design and Specification for Airtight Buildings NewSupplier CPD

Sustainability 🏭 Passive House Trust ⏱ 2 CPD Hours Free 📅 Added May 2026

About this CPD Resource

Mechanical ventilation with heat recovery (MVHR) system selection, ductwork design, commissioning and maintenance for airtight low-energy buildings and Passive House construction.

Mechanical Ventilation with Heat Recovery (MVHR) is the ventilation strategy of choice for airtight, highly insulated buildings. By recovering heat from extracted stale air and transferring it to incoming fresh air, MVHR can achieve heat recovery efficiencies of 80-95%. However, system performance is highly dependent on correct design, installation and commissioning.

Learning Outcomes

  • Understand MVHR operating principles and performance metrics
  • Size and design MVHR ductwork for low-energy buildings
  • Specify MVHR units to meet Part F and Passive House requirements
  • Commission and test MVHR installations for performance verification
Provider
Passive House Trust
CPD Hours
2 hours
Access
Free
Category
Sustainability

Who Is This Suitable For?

Architects
Building services engineers
Contractors
Energy consultants
Sustainability consultants

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Why This CPD Matters

The UK construction industry is responsible for approximately 40% of the country's total carbon emissions — roughly equally split between the operational energy use of buildings and the embodied carbon of construction materials and processes. Meeting the UK's legally binding commitment to reach net zero by 2050 requires a transformation in how buildings are designed, built and operated, and construction professionals are at the centre of that transformation.

Sustainability CPD is no longer a niche interest — it has become a core professional competency requirement. RIBA introduced mandatory sustainable architecture CPD in 2021, requiring all Chartered Members to engage with sustainability topics every year. ICE has made sustainable development (including decarbonisation and nature-positive design) a mandatory CPD theme. The Growing demand from clients, planning authorities and funders for BREEAM ratings, net zero carbon compliance and embodied carbon reporting means that construction professionals who lack sustainability knowledge are increasingly at a professional disadvantage. This CPD from Passive House Trust directly addresses this skills gap.

Key Topics and Industry Context

Sustainability in construction encompasses a broad and rapidly evolving range of topics. Energy efficiency in buildings — covering both operational energy (heating, cooling, lighting, hot water) and embodied carbon (the carbon emitted in producing, transporting and installing building materials) — is central to the industry's decarbonisation challenge. BREEAM, the world's leading sustainability assessment method for buildings, provides a framework for measuring and improving building sustainability across nine categories. The Passive House standard offers a rigorous energy performance framework for ultra-low energy buildings. Sustainable materials specification, including the use of Environmental Product Declarations (EPDs) to compare embodied carbon, is becoming standard practice on ambitious projects.

This resource from Passive House Trust contributes to the sustainability knowledge that construction professionals need to advise clients, design compliant buildings and meet the growing expectations of planning authorities and institutional clients for measurable sustainability performance.

How This Fits Your CPD Requirements

RIBA's mandatory core curriculum includes sustainable architecture as one of the topics that all Chartered Members must engage with each year as part of their 35-hour CPD requirement. ICE has designated Sustainable Development (including decarbonisation and nature-positive design) as one of three mandatory CPD themes that all professionally qualified members must cover over a three-year cycle. RICS recognises sustainability as a core competency for several its assessment pathways and its members are increasingly required to provide sustainability-related advice. CIOB includes sustainability in its CPD framework. Across all major construction professional bodies, sustainability is now a required area of competency development.

What efficiency should a good MVHR unit achieve?
A high-quality MVHR unit should achieve a specific fan power of 0.45 W/l/s or less and a heat exchanger efficiency of at least 75-80% to qualify for SAP credits under Part L.
What are the most common MVHR installation problems?
Common problems include excessive ductwork resistance, duct leakage, contamination of the heat exchanger from lack of filtration, and imbalanced supply and extract flows.
Does MVHR count towards BREEAM credits?
Yes. MVHR systems can contribute to BREEAM Energy credits by reducing heating demand and to Health and Wellbeing credits by improving indoor air quality.

About MVHR Design and Specification for Airtight Buildings

Mechanical Ventilation with Heat Recovery (MVHR) is the ventilation strategy of choice for airtight, highly insulated buildings. By recovering heat from extracted stale air and transferring it to incoming fresh air, MVHR can achieve heat recovery efficiencies of 80-95%. However, system performance is highly dependent on correct design, installation and commissioning.

This CPD resource is provided by Passive House Trust (Passive House Trust) and is suitable for Architects, Building services engineers, Contractors and other UK construction professionals.