Flat 51mm ducting MVHR system installation in low ceiling building

Flat 51mm semi-rigid ducting running pinned neatly to ceiling joists to prevent loss of room height

The Heat, Space and Light team has designed and supplied a flat 51mm semi-rigid ducting MVHR system for a home in London, in order not to lose any room height. The ducting measures a mere 51mm in height, is crush-proof… Continue reading

Cotswold new build is 100x more airtight than Building Regs and 6x more airtight than Passivhaus

It is subtle and understated in its impact on UK housing, but this new build bungalow home is one of the most energy efficient buildings in the world – and represents the future of housebuilding in the UK and Europe.… Continue reading

What’s the difference between an MVHR Heat Exchanger and an Enthalpy that recovers moisture?

Internal mechanism of an MVHR unit

If you’re researching installing a Mechanical Ventilation with Heat Recovery (MVHR) system for your project, you may have heard of an Enthalpy heat exchanger or ERV (Energy Recovery Ventilation). But what is an “Enthalpy” heat exchanger? How does it change… Continue reading

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

In my role as the lead MVHR technician at a Passivhaus / low energy design building consultancy we have received lots of questions and queries about MVHR systems. I’ve collected together my responses to some of the most pressing concerns… Continue reading