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HRS Services have the largest range of air test fans in the UK.

HRS can air test from individual component samples such as block work or cladding joints to small individual rooms up to the largest warehouse / factory building.

• HRS air test personnel are all highly experienced in both testing and air sealing work. This gives them practical on-site knowledge of real air sealing issues and how to solve them on-site

• HRS air test prices include supplying a portable smoke generator and smoke pencils to help pinpoint individual air leakage paths on the day of test, if necessary.

• All intentional ventilation openings should be temporarily sealed for the air tightness test.

• All H and V plant should be turned off.

• All drainage traps should be filled with water or sealed.

• All air tight plenums should be opened up so that a free flow of air through them is possible.

• All external doors and windows should be firmly closed and locked for the air test.

• All internal doors within the building or zone to be tested should be open.

• The maximum wind speed that HRS can carry out air tightness tests is approximately 18 - 20 mph.

• HRS air test price usually includes for the installation of temporary screen at time of test (Contact HRS regarding air test door location and size requirements)

• HRS have several units of all our fan types available, giving even greater flexibility in testing

• NB: For all tests: - Fan location opening must allow for air flow to all areas of envelope under test, e.g. by opening all internal doors, etc...

HRS MIDIfan

Fan type most typically used for office, warehouse and supermarket type building air tests

• Self contained. Hydraulically powered from HRS van - needs no on-site power

• Double fire / entrance or a loading bay door. Minimum clear opening width 1350mm required. Maximum floor step - internal level above external - 300mm.

• HRS air test price generally includes for building temporary screen, for example in double doorway. However, e.g. a loading bay door, a temporary screen may need to be built by the client. Contact HRS
  Temporary MIDIfan screen details(PDF file)
  Schematic Diagram(PDF file)

• Location door is required to be accessible by HRS 3.5t, long wheel-base van, parking within 5m of doorway to provide power to fan via hydraulic hoses.

• The ground to be cleared, level and firm for 5m area outside opening, to assist in installation of fan.

HRS PORTAfan

Smaller, more portable fan type most typically used where double door opening is not available for HRS MIDIfan or MIDIfan vehicle access is restricted.

• Portable units useful for restricted areas. Minimal clear area required for set up. Minimum clear opening width 900mm required

• 'Stackable' units - two units in a single door or four in a double door being typical

• 240v 30amp mains powered, fully breaker protected. If this is not available on-site, HRS can provide a suitable generator

• Client's on-site person required to assist with set up if level, clear access to location door not available

HRS LVFfans

Smallest fan types most used typically used for individual room and component testing

• Portable units useful for restricted areas. Minimal clear area required for set up. Minimum clear opening width 300mm - 100mm, dependent upon which of our range of LVF fans is required

• 240v mains powered, fully breaker protected. If 240v 30amp mains power is not available on-site, HRS can provide suitable generator. Contact HRS if this is the case

• Client's on-site person required to assist with set up if level, clear access to location door not available

Air Tightness - Case Studies

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HRS Services - a Nationwide service for over 20 years