MVHR System Design for Modern Homes: What Architects Should Consider

Modern homes are built to be airtight, energy-efficient, and comfortable. But without proper ventilation, these same features can lead to overheating, condensation, and poor indoor air quality.

That’s where MVHR (Mechanical Ventilation with Heat Recovery) systems come in.

For architects designing new-build homes, extensions, or refurbishments across Hampshire, Berkshire, and Surrey, early-stage MVHR planning is essential. It affects duct routes, ceiling depths, grille placement, and compliance with regulations like Part F and TM59.

This blog outlines the key MVHR design considerations architects need to address—and how ClimateWorks helps deliver ventilation systems that perform well without compromising the design.

Why MVHR matters in energy-conscious homes

Homes built to current energy standards are often too airtight for passive ventilation to work. Trickle vents and extract-only fans can’t deliver the required airflow or energy efficiency.

MVHR systems:

• Provide balanced, whole-house ventilation
• Recover up to 90% of heat from outgoing air
• Reduce moisture and condensation
• Support Part F and TM59 compliance
• Improve occupant comfort and indoor air quality

ClimateWorks designs and installs MVHR systems to meet these performance goals—while respecting space, aesthetics, and architectural vision.

Design-stage decisions that affect MVHR integration

Early architectural decisions impact how easily MVHR can be integrated into a home. We help architects plan for:

• Duct routes that avoid clashes with structure or lighting
• Central plant locations with short, balanced duct runs
• Access to filters and units for maintenance
• Grille locations that suit room use and layout
• Wall and ceiling construction that allows for recessed terminals

In Reading, Petersfield, and Godalming, we’ve helped architects avoid last-minute redesigns by flagging these requirements at Stage 2.

How ClimateWorks supports architects from Stage 2

Architects working across Farnham, Alton, and Newbury benefit from our early design input. We provide:

• Advice on unit selection based on building type and floorplan
• Suggested duct layouts for single-storey and multi-storey homes
• Coordination of external terminals with cladding or façade detailing
• Integration with SAP assessors and energy consultants
• CAD-ready layout support for construction drawings

By bringing us in at Stage 2 or 3, you reduce design changes, meet compliance targets, and simplify site coordination later.

Real project examples from Hampshire, Berkshire, and Surrey

Alton – Low-energy new-build

An architect-led scheme specified MVHR to meet SAP targets. ClimateWorks worked alongside the design team to create short duct runs and hide terminals within joinery. The system was installed with zero on-site changes.

Wokingham – High-spec renovation

A multi-zoned MVHR system was installed in a large family home. Our team helped rework ceiling voids and integrate wall diffusers that matched interior finishes.

Guildford – Extension and retrofit

The client wanted whole-home ventilation without major disruption. We used a semi-rigid ducting system routed through new structural zones, helping the architect avoid visible alterations to the original building.

What to avoid in MVHR planning

Architects often face issues when:

• Ceiling voids are too shallow for ductwork
• Unit locations are inaccessible for filter changes
• Grilles are placed too close to internal features or lighting
• External terminals aren’t coordinated with elevation design

ClimateWorks helps you avoid these problems before they occur, saving you time and reducing frustration during install and handover.

What MVHR systems need to comply with UK regulations

To meet ventilation and energy performance standards, MVHR systems must:

• Deliver required airflow rates by room (Part F)
• Support SAP Q performance targets (via SAP Appendix Q listed units)
• Minimise noise transmission between rooms
• Meet TM59 overheating limits in relevant rooms
• Provide access for regular maintenance

We ensure all these are addressed in the design—not just ticked off at commissioning.

Work with a partner who understands both design and compliance

If you're delivering high-performance homes in Hampshire, Berkshire, or Surrey, ClimateWorks supports you from concept to commissioning.

We help you:

• Integrate MVHR without changing your layouts late in the process
• Select the right system for your building type and structure
• Navigate Part F, SAP, and overheating risks
• Coordinate ducting, terminals, and access with interior and exterior design

Our team works directly with architects, energy assessors, and contractors to deliver results that satisfy your client—and keep your designs intact.

About the author

Dr. Julian Carter
Thermal Systems Expert and Technical Advisor at ClimateWorks

Dr. Julian Carter is a highly experienced thermal systems expert with over 15 years in the field, holding a PhD in thermal systems. His career spans academic research, consulting, and teaching, focusing on air conditioning and refrigeration systems. Dr. Carter bridges the gap between theoretical advancements and practical applications, providing expert insights to organisations like ClimateWorks, where his guidance informs decision-making and industry best practices. Notably, he has worked on international projects with organisations such as Daikin Industries, the International Institute of Refrigeration (IIR), and the United Nations Environment Programme (UNEP). Currently a lecturer at Edinburgh University, Dr. Carter combines his expertise with a passion for educating the next generation of engineers and advancing climate control technologies.

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