5 Knab Croft

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, 100 mm loft insulation

  Average

• Floor

  Suspended, 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, no cylinder thermostat

  Poor

• Lighting

  Low energy lighting in 27% of fixed outlets

  Average

• 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 (2012), 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

   Increase loft insulation to 270 mm

   Typical cost £100–£350 · saves about £27 a year

   Rating after56D
2. 2

   Floor insulation

   Typical cost £800–£1,200 · saves about £62 a year

   Rating after59D
3. 3

   Increase hot water cylinder insulation

   Typical cost £15–£30 · saves about £21 a year

   Rating after60D
4. 4

   Low energy lighting for all fixed outlets

   Typical cost £40 · saves about £27 a year

   Rating after61D
5. 5

   Hot water cylinder thermostat

   Typical cost £200–£400 · saves about £74 a year

   Rating after65D
6. 6

   Upgrade heating controls

   Typical cost £350–£450 · saves about £27 a year

   Rating after66D
7. 7

   Replace boiler with new condensing boiler

   Typical cost £2,200–£3,000 · saves about £126 a year

   Rating after72C
8. 8

   Solar water heating

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

   Rating after74C
9. 9

   Solar photovoltaic panels, 2.5 kWp

   Typical cost £9,000–£14,000 · saves about £219 a year

   Rating after84B

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