Openings

DEAP software tab: “Ventilation"
Count of chimneys	Follow DEAP guidance. Note, as per Table 3.1, the specified ventilation rate for chimneys (and open flues) “includes an allowance for the associated permanent vent for air supply, so this vent should not be entered separately”.	Photos of chimney openings and fireplaces; Survey form indicating no. of chimneys.
Count of open flues	DEAP guidance must be followed as it distinguishes between open flues, chimneys and room sealed appliances.	Photos of open flues and associated appliances; Survey form indicating no. of open flues.
Intermittent fans and background / passive vents	Pay close attention to to the guidance here in relation to trickle vents, controllable vents, and permanently open vents. The minimum open area of 3,500mm2 equates to an (open) circle of 67mm diameter.	Photos of typical wall/window background vent; Photos of intermittent fans; Survey form indicating no. of vents/fans.
Flueless combustion room heaters	See Ventilation Introduction here.	Photos of flueless vents and associated appliances; Survey form record.
Draught lobby	Sketch/architectural drawings and/or photograph required as supporting evidence for draught lobby set out here. Where a draught lobby is being entered as “Yes” in DEAP ensure sufficient detail is recorded on the sketch/drawings and/or survey form and/or photographs to support all criteria necessary to meet the requirements to be a draught lobby. Note: Apartments with access via an enclosed stairwell or corridor should be classified as having a draught lobby.	Sketch/ architectural drawings with dimensions, and/or, Photographic evidence

DEAP software tab: “Ventilation"
Ventilation: Infiltration due to openings
Guidance on re-use of data for Ventilation - Infiltration due to openings can be found here
Data Entry Item	Guidance	Documentary Evidence
Count of chimneys	Follow DEAP guidance. Note, as per Table 3.1, the specified ventilation rate for chimneys (and open flues) “includes an allowance for the associated permanent vent for air supply, so this vent should not be entered separately”.	Photos of chimney openings and fireplaces; Survey form indicating no. of chimneys.
Count of open flues	DEAP guidance must be followed as it distinguishes between open flues, chimneys and room sealed appliances.	Photos of open flues and associated appliances; Survey form indicating no. of open flues.
Intermittent fans and background / passive vents	Pay close attention to to the guidance here in relation to trickle vents, controllable vents, and permanently open vents. The minimum open area of 3,500mm2 equates to an (open) circle of 67mm diameter.	Photos of typical wall/window background vent; Photos of intermittent fans; Survey form indicating no. of vents/fans.
Flueless combustion room heaters	See Ventilation Introduction here.	Photos of flueless vents and associated appliances; Survey form record.
Draught lobby	Sketch/architectural drawings and/or photograph required as supporting evidence for draught lobby set out here. Where a draught lobby is being entered as “Yes” in DEAP ensure sufficient detail is recorded on the sketch/drawings and/or survey form and/or photographs to support all criteria necessary to meet the requirements to be a draught lobby. Note: Apartments with access via an enclosed stairwell or corridor should be classified as having a draught lobby.	Sketch/ architectural drawings with dimensions, and/or, Photographic evidence

¶ Openings