SmartArch

SmartArch - Occupant Density and Fresh Air Preliminary Calculation

This is a preliminary calculation only. Final values must be verified with the local authority, fire authority and qualified mechanical designer.

Input Panel

Project name

Prepared / checked by

Country / regulatory profile

Building type

Room use purpose

Net room area (m²)

Actual occupant count (optional)

Ceiling height (m)

Ventilation type

Local regulation/source note

Report output is available only as Word (.docx).

Status	Preliminary calculation completed
Country	en-GB - England / United Kingdom
Room / zone	Office / work area
Area	100.00 m²
Room volume	300.00 m³
Occupants	8
Occupant source	Calculated by occupant-load area table
Occupant density	0.080 person/m²
Rp - outdoor air per person	2.36 L/s·person
Ra - outdoor air per area	0.30 L/s·m²
Fresh air	48.88 L/s
Fresh air	175.97 m³/h
ACH	0.59 1/h
Risk / note	Open office, call center and dense work layouts require real occupant count verification.

Formula: Vbz = Rp × Pz + Ra × Az

Occupant density basis	Approved Document B / BS 9999 / fire strategy
Fresh air basis	Approved Document F Volume 2 + CIBSE guidance
Legal mode	building_control_required