8 Cowley

What the assessor found

Each part of the home, with the certificate's own energy efficiency rating.

• Walls

  Cavity wall, filled cavity

  Good

• Roof

  Pitched, 250 mm loft insulation

  Good

• Floor

  Solid, no insulation (assumed)

  Not rated on the certificate

• Heating

  Boiler and radiators, mains gas

  Good

• Heating controls

  Programmer and room thermostat

  Average

• Hot water

  From main system

  Average

• Lighting

  Low energy lighting in 22% of fixed outlets

  Poor

• Second heating

  Room heaters, mains gas

  Not rated on the certificate

The assessor's estimates at the energy prices in use when the certificate was made (2013), for a typical household. Today's bills will differ.

Improvements the certificate recommends

In the certificate's order. Each rating assumes the steps before it are done.

1. 1

   Floor insulation

   Typical cost £800–£1,200 · saves about £44 a year

   Rating after63D
2. 2

   Low energy lighting for all fixed outlets

   Typical cost £35 · saves about £25 a year

   Rating after64D
3. 3

   Upgrade heating controls

   Typical cost £350–£450 · saves about £22 a year

   Rating after65D
4. 4

   Replace boiler with new condensing boiler

   Typical cost £2,200–£3,000 · saves about £109 a year

   Rating after71C
5. 5

   Solar water heating

   Typical cost £4,000–£6,000 · saves about £32 a year

   Rating after73C
6. 6

   Solar photovoltaic panels, 2.5 kWp

   Typical cost £9,000–£14,000 · saves about £226 a year

   Rating after85B
7. 7

   Wind turbine

   Typical cost £1,500–£4,000 · saves about £19 a year

   Rating after86B

Costs and savings are the certificate's own, as estimated when it was made.