How is heat lost from dwellings?
The heat loss from a dwelling can be divided into two main
categories:
- Fabric heat loss - heat loss as it is transmitted through the
fabric of the building.
- Ventilation heat loss - heat loss through ventilation or
draughts.
See also:
Roof
insulation
Wall
insulation
Draught
proofing
Thermal study -
how much heat is YOUR house losing?
Reducing energy within the home
How much heat is being lost from my roof?
To find out how much heat was being lost from your roof during
our thermal imaging survey, enter your postcode and click on
"GO".
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All new UK heat map produced by Department for Energy and
Climate Change (DECC)
The National Heat Map was commissioned by the Department of
Energy and Climate Change and created by The Centre for Sustainable
Energy. The purpose of the Map is to support planning and
deployment of local low-carbon energy projects in England.
How it was done
The National Heat Map is built from a bottom-up address level
model of heat demand in England. The model estimates the total heat
demand of every address in England, but based on published
sub-national energy consumption statistics and without making use
of metered energy readings.
Heat demand density web maps were produced from this model,
covering Residential, Commercial, Industrial, Public Buildings
(DECs) and Total heat demand.
In addition point locations for Combined Heat and Power plants
and Power Stations were mapped along with Local Authority and
regional boundaries.
For both residential and non-residential models, heat demand was
first estimated at address level using a range of data sources.
These estimates were then used in a weighted disaggregation of
known small-area average heating fuel consumption.
It aims to achieve this by providing publicly accessible
high-resolution web-based maps of heat demand by area.
View the heat
map
Renewable Heat incentive
Types of insulation
In order to save you money by reducing your energy and water
costs whilst reducing your impact on the environment it is
essential to ensure your home is adequately insulated.
Standards of insulation in new housing are considerably higher
than they are in older housing. However, properties built before
current standards make up by far the largest proportion of the UK
housing stock. In order to improve energy efficiency, reduce
heating and hot water costs and to reduce CO2 emissions the fitting
of insulation into existing housing stock is essential.
The following are types of insulation:
- Hot water insulation
- Roof insulation
- Wall insulation - both cavity and solid wall
- Draught proofing
- Floor insulation
- Double and secondary glazing.
Pay back periods
| |
Annual savings |
Installed costs |
Pay back |
CO2 saving |
| Roof insulation |
Around £205 |
Around £250 |
Around 1 yr |
1 tonne |
| Cavity wall insulation |
Around £160 |
Around £250 |
Around 2 yrs |
800 kg |
| Solid wall insulation - internal |
Around £75-100 |
Around £650 |
Around 6 yrs |
2.3 tonnes |
| Solid wall insulation - external |
Around £500 |
Around £3500-6000 |
Around 11-15 yrs |
2.5 tonnes |
| Hot water jacket |
Around £40 |
Around £20 |
Around 5 months |
200 kg |