A period property in Hammersmith, London has been fitted with a Prana heat recovery ventilator, giving the homeowners a practical answer to a problem faced by many older properties: windows that mist up overnight, air that feels stale by midday, and no easy way to ventilate without letting the heat straight out. Rather than a full renovation, the fix came down to a single decentralised MVHR unit.

Unlike a traditional whole-house system, Prana works room by room. Each unit quietly pulls out moisture-heavy air and replaces it with fresh air pulled straight from outside, filtered along the way. What makes it worth the investment is the copper heat exchanger inside — it captures up to 96% of the heat that would otherwise disappear with the stale air, so ventilating no longer means turning the heating up to compensate.

For a London property like this one, the appeal of a decentralised MVHR system is as much about the installation process as the end result. There was no need to lift floors, install ducting, or plan around scaffolding — the unit was fitted directly into the wall in a single visit, with the surrounding decor left untouched.

A few weeks on, the difference is easy to notice: windows stay clear, the air feels lighter, and heating bills have edged down rather than up. For homeowners across Hammersmith and the wider London area weighing up their ventilation options, this project is a useful reference point for what a well-fitted Prana MVHR unit can realistically deliver.