54 Darwin Road

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, 200 mm loft insulation

  Good

• Floor

  Solid, no insulation (assumed)

  Not rated on the certificate

• Heating

  Boiler and radiators, mains gas

  Good

• Heating controls

  Programmer, no room thermostat

  Very poor

• Hot water

  From main system

  Good

• Lighting

  Low energy lighting in 10% of fixed outlets

  Poor

• Second heating

  Portable electric heaters (assumed)

  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 £57 a year

   Rating after63D
2. 2

   Draught proof single-glazed windows

   Typical cost £80–£120 · saves about £16 a year

   Rating after64D
3. 3

   Low energy lighting for all fixed outlets

   Typical cost £45 · saves about £39 a year

   Rating after65D
4. 4

   Upgrade heating controls

   Typical cost £350–£450 · saves about £51 a year

   Rating after69C
5. 5

   Replace boiler with new condensing boiler

   Typical cost £2,200–£3,000 · saves about £95 a year

   Rating after75C
6. 6

   Solar water heating

   Typical cost £4,000–£6,000 · saves about £28 a year

   Rating after76C
7. 7

   Replace single glazed windows with low-E double glazed windows

   Typical cost £3,300–£6,500 · saves about £43 a year

   Rating after78C
8. 8

   Solar photovoltaic panels, 2.5 kWp

   Typical cost £9,000–£14,000 · saves about £250 a year

   Rating after87B

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