Specifying MVHR for Large, Multi-Zone Residential Projects

Large homes and multi-zone residential developments create complex ventilation challenges. One-size-fits-all MVHR layouts don’t work when you’re dealing with multiple floor levels, varying room usage, and acoustic sensitivity.

In projects across Hampshire, Berkshire, and Surrey, we help architects and contractors specify MVHR systems that meet building regulations, client expectations, and technical constraints—without design compromise.

This blog outlines how we deliver scalable, zone-aware MVHR strategies and what developers need to consider during early-stage design.

Why multi-zone homes demand more from MVHR systems

Poor MVHR planning in large homes can lead to:

• Imbalanced airflow between floors or wings
• Over-ventilation in guest rooms and under-ventilation in living zones
• Complex duct routes that increase noise or reduce performance
• Filter access in hard-to-reach locations
• Grille placement that clashes with design features or lighting

We’ve solved all of these problems on projects in places like Winchester, Bracknell, and Godalming—by planning systems zone-by-zone.

How we design zone-aware MVHR systems

We tailor systems to the building layout and user needs:

• Split MVHR units by floor or building wing
• Use manifold duct systems for flow balance and easier routing
• Adjust supply and extract rates based on real usage patterns
• Plan for future flexibility in case of layout changes
• Ensure plant access and serviceability without disrupting design

This approach delivers better airflow, lower noise, and higher client satisfaction.

Project examples from Hampshire, Berkshire, and Surrey

Alton – Large three-storey home

We installed two MVHR units—one serving ground and first floors, the other for the loft level. Each had independent ductwork, balancing, and filters. This avoided long duct runs, reduced fan power, and simplified future maintenance.

Newbury – Upside-down house layout

Living spaces were on the top floor with bedrooms below. We reversed the standard MVHR zoning, providing boosted extract from the upper level and careful attenuation to limit sound transfer through vertical ducts.

Camberley – Multi-wing residence

The property had separate guest and family wings. We specified twin MVHR systems with sound-insulated ducting and staggered grille layouts to maintain visual symmetry. Supply airflows were balanced separately for each zone.

What developers and contractors should plan for

On complex projects, don’t wait until Stage 4. We recommend:

• Space allowance for more than one unit if needed
• Dedicated risers or service zones per zone/floor
• Pre-agreed access points for filters and silencers
• Coordinated grille placement with lighting and AV
• Confirmation of structure clearances before finalising duct design

These reduce clashes, delays, and retrofit work during the build.

MVHR systems we recommend for multi-zone projects

We often install:

• Twin-unit systems with cross-zone balancing
• Semi-rigid radial ducting for fast airflow and minimal bends
• Zoned controllers for user flexibility in each part of the house
• Attenuators in vertical ducts to manage sound
• Access panels concealed in joinery or eaves space

The result: reliable ventilation, quiet performance, and happy clients who don’t see or hear the system.

Avoid single-point failures and access issues

Large homes need MVHR systems that:

• Have accessible filters near occupied spaces
• Offer independent fault isolation (not one fan serving everything)
• Can be serviced without disrupting ceilings or finishes
• Don’t rely on long duct runs through critical structural areas

We help you deliver systems that meet these standards—on time and to spec.

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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