Introduction
If you're building new homes in the UK, the regulatory landscape is shifting fast. The Future Homes Standard is set to transform how new builds are designed, constructed, and ventilated — and if you're not preparing now, you could find yourself scrambling when the rules land. Higher insulation levels and near-airtight envelopes are good news for energy bills, but they create a very real challenge: without adequate ventilation, those homes become stuffy, damp, and potentially harmful to occupants. Here's what you need to know before the new rules take effect.
What Is the Future Homes Standard — and Why Does It Matter?
The Future Homes Standard (FHS) is the UK government's flagship policy for decarbonising new residential construction. It forms part of a broader package of changes to Approved Document Part L (Conservation of Fuel and Power) and Part F (Ventilation), with the intention of reducing carbon emissions from new homes by approximately 75–80% compared to current standards.
The regulations are expected to come into full force in 2025/26, following a transitional period. The core ambition is net zero-ready homes: properties that are fabric-first, low-energy, and fitted with low-carbon heating systems such as heat pumps.
For builders and architects, this isn't a distant concern. Homes being designed right now will need to comply, and procurement decisions made today will determine whether those projects meet the new benchmarks or require costly redesigns later.
👉 See our full guide to Part F ventilation compliance
Why Tighter Homes Demand Better Ventilation
This is where many builders miss the connection. As thermal performance improves — thicker insulation, triple glazing, highly detailed airtightness — natural ventilation all but disappears. There's simply no route for stale, moist air to escape on its own.
In an older, draughty property, accidental air leakage does a surprising amount of heavy lifting. But in a modern FHS-compliant new build, you're looking at air permeability targets in the region of 3–5 m³/h/m² at 50Pa, or tighter still in Passive House designs. At those levels, you need a mechanical system to control the exchange of air — otherwise you're looking at condensation on cold surfaces, mould growth, and poor indoor air quality within months of handover.
Building Regulations Part F is being updated in parallel with Part L to address exactly this. The expectation is that new builds will need continuous, controlled ventilation — not just extract fans in kitchens and bathrooms. MVHR (Mechanical Ventilation with Heat Recovery) is increasingly the system of choice for meeting these requirements.
How MVHR Meets the Future Homes Standard
Mechanical Ventilation with Heat Recovery does two things simultaneously: it supplies fresh, filtered air to living and sleeping spaces while extracting stale air from wet rooms. Critically, it recovers up to 90% of the heat from the outgoing air before it leaves the building — meaning you're not constantly heating fresh air from cold.
That heat recovery efficiency is directly relevant to the FHS carbon targets. Unlike simple extract fans, MVHR doesn't introduce a ventilation heat loss penalty. In a well-designed FHS build, the system runs quietly in the background, maintaining air quality without compromising the thermal performance of the fabric.
Modern MVHR units are also highly configurable — summer bypass modes prevent overheating, smart controls allow occupants to adjust airflow, and humidity sensors can trigger boost modes when moisture levels rise. These features align directly with the FHS's overheating strategy requirements, which require designers to demonstrate that new homes won't overheat under future climate scenarios.
👉 Browse our MVHR systems for new builds
Key Benefits of MVHR in FHS-Compliant New Builds
- Supports net zero carbon targets — heat recovery reduces ventilation energy losses, contributing to the overall carbon reduction calculation
- Meets updated Part F requirements — provides continuous, controlled, whole-house ventilation in line with expected new build regs 2026
- Addresses overheating risk — summer bypass and smart controls help manage thermal comfort year-round
- Improves indoor air quality — filtered, fresh air reduces allergens, CO₂ build-up, and moisture-related issues
- Quiet and unobtrusive — modern units operate at very low noise levels, suitable for bedrooms and open-plan living
- Compatible with airtight Passive House and near-Passive designs — essential in buildings where natural ventilation is by design eliminated
Supporting Products for FHS Projects
A successful FHS ventilation strategy doesn't begin and end with the MVHR unit. Airtightness is equally important — even the best MVHR system can't perform correctly if the building envelope leaks. At Heat Recovery Direct, we supply a comprehensive range of products to support compliant, high-performance new builds:
- MVHR Units — whole-house systems with high heat recovery efficiency, suited to FHS and Passive House specifications
- Airtightness Tapes and Membranes — essential for achieving and maintaining the airtightness targets required under new build regs 2026
- Ducting and Accessories — rigid and flexible ducting systems for clean, balanced airflow distribution
👉 Explore our airtightness range for new builds
Why Builders and Architects Trust Heat Recovery Direct
Heat Recovery Direct has been supplying ventilation systems, airtightness solutions, and renewable energy products to construction professionals across the UK and Ireland for years. We work with architects, principal contractors, self-builders, and retrofit specialists — anyone serious about building homes that perform.
Our team understands the technical demands of FHS compliance. We can advise on system selection, specification, and installation to help your projects meet current and upcoming regulations with confidence.
Get Your New Build FHS-Ready
The Future Homes Standard represents the most significant shift in building regulations for a generation. For builders and designers working on new residential projects, the time to act is now — not when the regulations formally land on your desk.
Specifying the right ventilation system from the outset means avoiding expensive changes later, delivering better homes for occupants, and demonstrating compliance with confidence.
👉 Shop MVHR Systems for New Builds
👉 Contact our team for expert specification advice
Frequently Asked Questions
What is the Future Homes Standard and when does it come into effect? The Future Homes Standard is a UK government policy requiring new homes to be built to significantly higher energy and carbon performance levels. It targets a 75–80% reduction in carbon emissions compared to current standards. Implementation is expected in 2025/26, with transitional arrangements already underway. Builders working on projects now should be designing to FHS-level performance.
Will MVHR be required under the new Future Homes Standard? MVHR is not mandated by name, but the expected Part F ventilation update and the airtightness levels required to meet Part L carbon targets make continuous mechanical ventilation effectively necessary in compliant new builds. MVHR is the most energy-efficient and technically appropriate solution for homes built to FHS standards.
Does the Future Homes Standard apply in Scotland and Ireland? The FHS applies to England and Wales. Scotland has its own equivalent trajectory through its Energy Efficient Scotland programme and Building Standards updates. The Republic of Ireland operates under separate NZEB (Nearly Zero Energy Building) regulations, though the direction of travel — high fabric performance combined with mechanical ventilation — is consistent across all four nations.