Energy efficiency — SAP, EPC ratings

What you'll learn

1. 1

   Imagine your house has an Energy Performance Certificate (EPC) — it's like a school report for how much energy your home wastes or saves.

2. 2

   What does the letter A mean on an EPC rating?

3. 3

   Drag the slider to match the EPC rating to its SAP score range. SAP 82–100 = A, SAP 55–68 = D, SAP 1–20 = G.

4. 4

   A house has a SAP score of 65. What EPC rating does it get?

5. 5

   A house has a SAP score of 45. What EPC rating does it get?

6. 6

   Build the SAP score for a house with these features: good insulation (+20), double glazing (+10), old boiler (−15). Start from a base of 50.

7. 7

   Which of these would IMPROVE a home's energy efficiency the most?