How to Reduce Project Risk with a Single MVHR Partner Across Multiple Sites

MVHR systems have become a standard requirement in modern building design. But when different sites use different installers, developers face inconsistent performance, commissioning failures and poor documentation.

Main contractors and developers across Hampshire, Berkshire and Surrey can reduce risk and improve outcomes by working with a single MVHR partner. This blog explains how.

The risks of using multiple MVHR subcontractors

Developers and contractors report the following issues when rotating suppliers:

• Systems are not commissioned to the same standard
• Grille locations and airflows vary even across similar house types
• O&M manuals are inconsistent or missing data
• Site teams receive different guidance for each scheme
• SAP results vary despite similar layouts and fabric specifications

In Reading and Basingstoke, clients experienced SAP failures due to mismatched MVHR installations across developments using the same layout and fabric spec.

Benefits of a single MVHR partner

Working with one trusted MVHR partner provides:

• Repeatable design templates across sites
• Predictable SAP and SBEM inputs
• Pre-agreed grille layouts and zone control logic
• Consistent commissioning and handover standards
• Fewer post-completion defects linked to ventilation

Clients in Andover and Woking have seen a 50 percent reduction in air test failures after moving to a single system supplier.

Case studies

Farnham residential developer (Q2 2024)

ClimateWorks provided MVHR design, supply and install across three sites totalling 96 homes. Every unit followed the same grille layout, duct route, and commissioning checklist. SAP submissions were fast-tracked with no performance queries.

Oxford townhouse scheme (Winter 2023)

The developer used a consistent MVHR strategy for energy compliance. ClimateWorks supported planning, coordinated early with the architect and ensured that all visible grilles matched the building’s internal style.

Reading apartment block (Spring 2024)

On a nine-storey scheme, ClimateWorks provided identical documentation packs for each flat and supported air test preparations. No post-PC ventilation issues were reported by the FM provider.

Endorsements from clients

"Having one MVHR provider has saved us time, stress and money. Every project runs smoother."
Construction Director, Reading (2024)

"They know our layouts, they know our standards, and they deliver every time."
Project Manager, Farnham developer (2024)

How this reduces your project risk

• Fewer delays during air testing and commissioning
• Reduced risk of non-compliance with Part F ventilation rates
• Easier coordination with SAP assessors and building control
• One contact for support and system queries
• Full lifecycle support for maintenance and handover

We help contractors avoid rework and missed deadlines across Hampshire, Berkshire and Surrey including towns like Guildford, Newbury and Wokingham.

What to expect from your MVHR partner

• Support at RIBA Stage 3 and 4 to finalise layout and grille positions
• Integration with lighting and ceiling coordination
• SAP-ready documentation for assessors and planning officers
• Site guides for builders and follow-on trades
• O&M packs that match your portfolio standards

Whether you are delivering a one-off scheme or a long-term programme, a consistent partner improves control.

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.

‍