|1 (basic utility)
Plant rooms (excluding electrical equipment)
|Some leakages and damp areas tolerable. Local drainage may be required
||> 65% normal UK external range
||Visible damp patches may be acceptable
||Minor seepage may be acceptable
Car parks: atmospheric
Workshops: 15-29 oC
Mechanical plant rooms: 32oC max. at ceiling height
|2 (better utility)
||Workshops and Plant rooms requiring drier environment than Grade 1 storage
||No water penetration but damp areas tolerable dependant on the intended use. Ventilation may be required to control condensation.
||No visible damp patches, construction fabric to contain less than air dry moisture content.
Retail Storage: 15oC max.
Electrical Plant rooms: 42oC max.
||Ventilated residential and commercial areas including offices, restaurants, and leisure centres etc.
||Dry environment. No water penetration. Additional ventilation, dehumidification or air conditioning appropriate to intended use.
55-60% for restaurants in summer
Active measures to control internal humidity may be necessary.
Residential at 18-22oC
- Spectators: 18oC
- Squash courts: 10oC
- Changing rooms: 22oC
- Swimming pools: 24-29oC
Kitchens: 29oC max.
||Archives, Landmark buildings, and stores requiring a controlled environment
||Totally dry environment. Requires ventilation, dehumidification, or air conditioning appropriate to intended use.
||50% for art storage
>40% for microfilms and tapes
35% for books
|Active measures to control internal humidity probably essential
Art storage: 18-22oC
Book archives: 13-18oC