Air Change Ltd.

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Air Change Ltd. Specialist MVHR, heating & cooling services focused on building performance.

Passivhaus approach to ventilation, integrated building services and envelope detailing. Registered ATTMA Airtightness tester supporting architects, trades and self-builders.

We’ve been closely involved in the development of the integrated building services system for a new affordable home prot...
11/01/2026

We’ve been closely involved in the development of the integrated building services system for a new affordable home prototype by Makar.

For this prototype to work as a genuine model, (particularly in deep winter), ventilation, heating, cooling and domestic hot water needed to be considered as a single, integrated system rather than separate add-ons.

The system combines ventilation with heat recovery, a heat pump and hot water storage, and required early involvement, research and coordination to ensure the building behaves as intended: quiet, stable, fresh and comfortable with minimal energy input.

Credit to Makar for the progress they’ve made over recent years and for investing in a real, working prototype to test what affordable housing can achieve when fundamentals are prioritised.

This is building science in practice — not something that can be added at the end.

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Air Change Ltd, Kylerona Farm

IV27QZ

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