11 Bowyer Close

What the assessor found

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

• Walls

  Cavity wall, as built, no insulation (assumed)

  Very poor

• 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, TRVs and bypass

  Average

• Hot water

  Electric immersion, standard tariff

  Very poor

• Lighting

  Low energy lighting in 83% of fixed outlets

  Very good

The assessor's estimates at the energy prices in use when the certificate was made (2014), 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

   Cavity wall insulation

   Typical cost £500–£1,500 · saves about £126 a year

   Rating after64D
2. 2

   Floor insulation

   Typical cost £800–£1,200 · saves about £37 a year

   Rating after66D
3. 3

   Add additional 80 mm jacket to hot water cylinder

   Typical cost £15–£30 · saves about £34 a year

   Rating after67D
4. 4

   Upgrade heating controls

   Typical cost £350–£450 · saves about £29 a year

   Rating after68D
5. 5

   Replace boiler with new condensing boiler

   Typical cost £2,200–£3,000 · saves about £52 a year

   Rating after70C
6. 6

   Solar water heating

   Typical cost £4,000–£6,000 · saves about £130 a year

   Rating after74C
7. 7

   Heat recovery system for mixer showers

   Typical cost £585–£725 · saves about £27 a year

   Rating after75C
8. 8

   Solar photovoltaic panels, 2.5 kWp

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

   Rating after84B

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