Ene02 Percentage of mechanical ventilation – Above Green

*contributes to 40 credits available for asset energy rating

Aim

To minimise operational energy consumption and the associated carbon emissions by increasing the intrinsic energy efficiency of the building fabric and the installed buildings services.

Question

What percentage of the floor area is mechanically ventilated?

Credits	Percentage of floor area that is mechanically ventilated
-	%

Evidence

Criteria

Evidence requirement

The evidence below is not exhaustive, please also refer to the ‘BREEAM evidential requirements’ section in the scope of the Guidance for appropriate evidence types which can be used to demonstrate compliance.

All

The following can be used to demonstrate compliance:

Visual inspection and verification through photographic evidence of the ventilation system

Building plans showing the floor area that is mechanically ventilated and how the percentage of the floor area was calculated

Definitions

Mechanically ventilated area:

For the purposes of this BREEAM In-Use issue, a mechanically ventilated area is an area with centralised mechanical ventilation system.

Typically, a mechanically ventilated area will provide both supply and extract. Areas that are fitted with local mechanical extraction should not be included.

Additional information

Asset energy calculator

In order to obtain the maximum possible number of credits for the asset energy performance as much information as possible should be entered. Where no value is entered, the asset energy rating calculator will assume a pessimistic default value.