Mechanical ventilation with heat recovery supplies fresh air and removes stale, humid air while retaining much of the heat that would otherwise be lost.
The building needs to suit the system
MVHR is most effective in a well sealed home where airflow can be controlled. New builds and deep retrofits are often the best candidates because airtightness and duct routes can be planned together.
Design and commissioning matter
Correct duct sizing, quiet airflow and balanced commissioning determine how the system feels in daily use. Filters also need accessible locations so routine maintenance remains straightforward.