What numbers do I need to size a heat pump?

[Selfbuildsarah]

We have received a predicted energy assessment and a BREL compliance report today. Will I find the numbers I need in there to help size a heat pump? I can’t see anything re heat loss amongst the headings. We are meeting with an installer tomorrow. Over heating stuff is to follow.

[SimonD]

8 minutes ago, Selfbuildsarah said:

We have received a predicted energy assessment and a BREL compliance report today. Will I find the numbers I need in there to help size a heat pump? I can’t see anything re heat loss amongst the headings. We are meeting with an installer tomorrow. Over heating stuff is to follow.

 

SAP is about calculating energy use not about sizing the actual heating system or emitters. But the new standards for heat loss and system design do use aspects of SAP (e.g. designed or measured air permeability). You do need a heat loss calc and system design.