How much duct space do you need around the house for an MVHR system?

MVHR with ComfoCool installed in a residential home showing spacing requirements

The most common question I’m asked by people interested in mechanical ventilation with heat recovery (MVHR), low energy building design or Passivhaus is: How much space do we need for the ducts in an MVHR ventilation system? Variations to the… Continue Reading

What puts people off about MVHR systems? Cleaning ducts, airborne viruses and maintenance explained

MVHR Manifold and radial system ducting

In my role as the lead MVHR technician at Enhabit I receive lots of questions and queries about MVHR systems. I’ve collected together my responses to some of the most pressing concerns that people have with a home ventilation duct… Continue Reading

How airtightness testing differs between Building Regs and Passive House – and why it matters so much

Using a smoke pen to detect leaks during airtightness testing

Building Regulations Part F wants to know how much air (in m3hr) passes through each metre square area of the fabric (m2). This is the Air Permeability (AP or m3.hr/m2) figure of the building. To get the AP figure, one… Continue Reading

How much does an MVHR or heat recovery ventilation cost to buy and install?

how-much-does-an-mvhr-fully-installed-cost

If you’re building or renovating to PassivHaus or low energy standards and you and your contractor are working hard to make sure the airtightness fabric is perfect, you will need mechanical ventilation in order to supply the fresh air you need… Continue Reading