Testimonials

I couldn't find a Vent-Axia Heat Recovery Kit cheaper anywhere else online. Highly recommend these guys.

John Morrison

Bristol, United Kingdom

I wasn't sure what to order so phoned and they were so helpful. Had my answer and placed an order within 25 minutes.

Andy Wilson

Co.Meath, Ireland

Amazing service, phones answered and calls returned promptly. Declan helped tremendously with planning an MVHR for a bungalow to loft conversion; and I asked loads of questions. Would without fail go back to them

Gerald Wiley

Google Reviews

Purchased my heat recovery system from heat recovery direct. Easy process from from design to installation! Staff are very helpful and always at hand with any queries I had! Highly recommend

Scott Walker

Google Reviews

Pleasure to deal with. Bought Siga tape, delivery was prompt and price very good.

Michael F

Google Reviews

MVHR Systems – Frequently Asked Questions

What does MVHR stand for?

MVHR stands for Mechanical Ventilation with Heat Recovery. It's a whole-house system that provides continuous ventilation
while recovering heat from the extracted air.

How does an MVHR system work?

It extracts warm, stale air from rooms like
kitchens and bathrooms, recovers the heat through a heat exchanger, and
supplies fresh, filtered air to living areas without mixing the two airflows.

Will an MVHR system heat my home?

No. An MVHR system doesn't generate heat, but it recovers and reuses existing heat to reduce heating demand.

How much heat does it recover?

High-quality MVHR systems recover between 60% and 95% of the heat from outgoing air, depending on system efficiency and airtightness of the home.

Is a MVHR system noisy?

Not if properly installed. Good MVHR units
with insulated ductwork operate quietly, especially when designed with radial
systems.

Can I still open my windows?

Yes, but it's not necessary for
ventilation. Opening windows may reduce the system’s efficiency.

What maintenance does it require?

Minimal. Filters should be replaced or
cleaned every 3–6 months, and the system checked every two years.

How much electricity does a heat recovery system does it use?

Typically
20–80 watts, costing around £50–£80 per year to run

CanI retrofit MVHR in an existing home?

Yes, but it can be more complex than in new builds. Careful planning for ducting and layout is essential. Heat Recovery Direct are here to help ! we can design and guide you through the install process.

Is MVHR suitable for all types of homes?

It's ideal for airtight homes, especially
new builds, Passivhaus, and low-energy properties. It can also be a great addition to a retrofit or even an old stone building.

Do MVHR ducts need insulation?

Yes. Especially ducts that run through
unheated spaces to prevent heat loss and condensation.

Can I install MVHR myself?

You can use DIY kits, but professional
commissioning is recommended to ensure compliance and performance.

What happens during a power cut?

The system stops temporarily and restarts
automatically when power returns. There’s no lasting damage.

Does MVHR prevent condensation and mould?

Yes. It removes excess moisture and keeps
humidity levels balanced, helping prevent mould and damp.

Can MVHR help cool the house in summer?

Not like AC, but it helps by bringing in
cooler night air with the summer bypass feature.

Can it distribute heat from towel rails or stoves?

It can redistribute warm air, but it
is not a replacement for a heating system.

What are common MVHR installation mistakes?

Poor duct design, unbalanced airflow,
flexible ducting overuse, lack of commissioning, and missing insulation.

Does A MVHR system run all year?

Yes. MVHR systems are designed to run 24/7, year-round. Many have a summer bypass feature for warmer months.