A) Minimum flow rate as required by Approved Document Part F
B) Employer’s Requirements (ERs) from the client, which could increase the flow rate
C) Minimum requirement of the NABERS standard (where applicable)
D) Minimum requirement for smoke clearance
H) Requirements checked based on application of EN 378 (refrigeration and safety)
J) Meeting the minimum air-change rate for the intended space use
K) Based on application and local codes — may include, but not be limited to, the above items

A) Minimum air change rates as per Building Regulations Part F and CIBSE Guide B
B) Functional use of each space (e.g., plantroom, storage, corridor, kitchen, refuse room)
C) Requirements from Employer’s Requirements (ERs) or FM team for odour and temperature control
D) Energy efficiency and operational limits from Part L or local sustainability codes
E) Coordination with fire strategy and smoke extract zones
F) Space ventilation rates assumed from residential design standards
G) Based on the building type and risk level, may include but not be limited to the above items

A) Air velocity limits in main ducts, branches, and terminals as per CIBSE Guide C or ASHRAE recommendations
B) Target pressure drop per metre of ductwork for energy-efficient fan selection
C) Ductwork leakage class (Class A, B, or C) and corresponding test requirements
D) Duct material thickness and flange specification only to be decided at construction stage
E) Acceptable background noise level (NR / dB(A)) per space type in accordance with CIBSE Guide B or BB93
F) Responsibility for acoustic lining or attenuators within the system
G) These parameters should be defined in the BOD and confirmed before detailed design begins

A) Ductwork material type (galvanised steel, aluminium, stainless steel, or fabric) based on location and air quality requirements
B) Minimum galvanising coating or corrosion-protection class in accordance with DW/144 or BS EN 10142
C) Type, thickness, and facing of thermal insulation to meet energy and condensation requirements (per BS 5422)
D) Acoustic insulation specification for noise control in sensitive areas
E) Fire-resistance and surface-spread-of-flame rating of both duct and insulation materials in line with BS EN 13501 or local code
F) Insulation adhesive and vapour-barrier details to be confirmed after installation
G) Environmental and sustainability criteria (VOC content, recycled content, compliance with BREEAM/LEED targets)
H) All of the above, except F, should be defined and agreed during BOD stage

A) Typical and peak occupancy profiles for each space or zone (office, meeting, retail, BOH, etc.)
B) Expected operating hours and schedule of air-handling equipment
C) Diversity factor applied to simultaneous peak occupancy or load conditions
D) Strategy for demand-controlled ventilation (CO₂ / occupancy / time scheduling)
E) Energy-efficiency implications of diversity assumptions and part-load operation
F) To be finalised during commissioning after installation
G) Documentation of all assumptions in the BOD and validation against ERs

A) Indoor Air Quality (IAQ) targets for CO₂, VOCs, particulates (PM₂.₅/PM₁₀) in line with CIBSE TM40 and WHO guidelines
B) Predicted Mean Vote (PMV) and Predicted Percentage Dissatisfied (PPD) comfort range (e.g. PMV = –0.5 to +0.5, PPD < 10 %)
C) Post-occupancy testing and verification plan for IAQ and thermal comfort (Part F and TM63 requirements)
D) End-user feedback mechanism referencing lessons learned from existing or similar buildings
E) Plan to review actual performance one year after handover (Soft Landings approach)
F) These parameters are only required for BREEAM-certified projects
G) All items A to E should be included where applicable, regardless of certification

A) Target air-tightness rate (e.g. ≤ 5 m³/h·m² @ 50 Pa for non-domestic buildings, or project-specific)
B) Test method and standard to be applied (e.g. ATTMA TSL1/TSL2, CIBSE TM23 or ISO 9972)
C) Responsibility for testing and certification during completion phase
D) Impact of infiltration on ventilation strategy, heating/cooling load and energy modelling assumptions
E) Sealing strategy around penetrations, façade interfaces, and door thresholds
F) To be determined after construction and adjusted by BMS controls
G) Documentation of agreed target and method in the BOD and ERs

A) Strategy for purge ventilation in accordance with Building Regulations Part F and TM59
B) Percentage of openable façade area and control method (manual / automatic)
C) Limitations caused by external noise, pollution, or security that may restrict window opening
D) Integration of mechanical assist or hybrid systems if natural purge is not feasible
E) Thermal modelling assumptions for worst-case summer conditions and occupancy patterns
F) Requirement for occupant override or local control for comfort
G) Confirmation that overheating and purge requirements are documented in the BOD and validated against ERs

A) Location of outdoor air intake and exhaust discharge to avoid short-circuiting, contamination, or odour recirculation
B) Minimum separation distance between intake and exhaust openings in accordance with CIBSE Guide B2 and ASHRAE 62.1
C) Louvre and grille free area percentage (typically 50–70%) and associated pressure-drop allowance
D) Aesthetic and architectural integration (colour, framing, and façade coordination)
E) Access for cleaning and maintenance as per Part F and DW/143
F) Acoustic and rain-ingress performance of louvres (Class A/B) based on EN 13030
G) To be finalised during construction once façade design is complete

A) Make-up air requirements for boiler rooms or combustion appliances in accordance with BS 6644 / IGEM UP10
B) Whether dryers, kitchens, or other process equipment have dedicated extract systems supplied by the vendor or require central connection
C) Simultaneous operation and interlock between process extract and general ventilation to maintain pressure balance
D) Minimum ventilation rates and temperature limits for plantrooms housing gas or heat-generating equipment
E) Exhaust discharge height, location, and dilution to comply with DEFRA / Clean Air Act guidance
F) To be confirmed during installation when equipment is delivered
G) Documentation of all process-related ventilation systems and responsibilities within the BOD and Employer’s Requirements

A) Identification of pressure relationships between clean and dirty areas (e.g. labs, WCs, kitchens, plantrooms, offices)
B) Target pressure differential values (typically 5–15 Pa) to maintain required air direction
C) Locations requiring positive or negative pressurisation for containment or hygiene control (e.g. clean rooms, isolation areas)
D) Method of achieving and controlling pressure steps (e.g. extract dominance, door undercuts, pressure sensors)
E) Reference to applicable standards such as CIBSE Guide B2, HTM 03-01, or BS EN 13779
F) To be determined after commissioning and adjusted manually if needed
G) Documentation of all pressure relationships and control strategy in the BOD and Employer’s Requirements