Typically, two-thirds of a building’s heat is lost through the fabric with the remaining third being lost through gaps and vents which allow warm air to leave and cold air to enter the space (either uncontrolled or deliberately for ventilation).
When upgrading a heating system, improving fabric and making a building more airtight should be the first priority. These actions will almost certainly reduce heat loss, which will impact on the size of any new heating (or cooling system) required.
Why improve building fabric?
- Better temperature control – building fabric affects the heating, cooling and ventilation characteristics of a space
- Improved productivity – occupant comfort and morale can be enhanced by reducing draughts, solar glare, overheating and noise
- Lower capital expenditure - a more efficient, well-insulated building needs a smaller heating and cooling plant
- Good investment - better insulation can increase a building’s value and attractiveness.
In addition to economic benefits, there are social and environmental advantages to reducing a building’s energy consumption, such as improved working and living conditions, preserving fossil fuel supplies and minimising climate change.
Factors that affect heat loss
Knowing how to minimise the effects of these factors can save money and energy.
Regular maintenance for optimum performance
Create a walk round checklist and use this to look round your building and record your findings.
Low and medium cost options for different fabric types
There are many simple actions that can be taken to reduce heat losses through:
- Windows and doors
- Walls
- Roofs
- Ceiling and floors.
Things to consider during refurbishment
Many improvements to building fabric can be expensive to carry out and are disruptive to business activity. This section provides some guidance on what should be considered regarding:
- Windows
- Doors
- Walls
- Roofs
- Ceilings and floors.