The pump heats water and circulates it in the floors of the ground floor of the house and in radiators on the top floor. It also has an internal hot water tank

The pump heats water and circulates it in the floors of the ground floor of the house and in radiators on the top floor. It also has an internal hot water tank for tap water, and a backup electrical heater. https://assetstore.nibe.se/hcms/v2.3/entity/document/121339/storage/MTIxMzM5LzAvbWFzdGVy https://assetstore.nibe.se/hcms/v2.3/entity/document/121339/... I do have ducts for exhaust air from kitchen and bathrooms. That’s where the pump takes it’s heat from so it doesn’t need to work with outdoor temp air.