Mechanical Ventilation with Heat Recovery - basically you pull fresh air into the house and push old air out and transfer the temperature of the old air to the new air. This means you aren’t having to heat or cool the new air but you still get fresh air.
Mechanically Ventilated Heat Recovery system. It lets you get fresh air without losing heat / cool as the expelled air heats / cools the inlet air transferring its energy over.
What’s MVHR?
Mechanical Ventilation with Heat Recovery - basically you pull fresh air into the house and push old air out and transfer the temperature of the old air to the new air. This means you aren’t having to heat or cool the new air but you still get fresh air.
Mechanically Ventilated Heat Recovery system. It lets you get fresh air without losing heat / cool as the expelled air heats / cools the inlet air transferring its energy over.
https://www.greenbuildingstore.co.uk/information-hub/heat-recovery-ventilation-mvhr/