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4 Application and Planning
4.1 Application
This MVHR unit is intended for installation
in ventilation systems in houses, residential
buildings and light commercial applications
(e.g. offices and meeting rooms etc). Upon
completion of the system, there should be no
safety, health or environmental risks present.
The manufacturer of the MVHR unit assumes
no liability for this.
4.2 MVHR operation overview
Using two fans in separate ducts, the MVHR
draws in external air from the outside and
exhaust air from odour-contaminated and
moisture-laden rooms (kitchen, bathroom, WC)
in the house.
Both of these air flows are passed through filters
to a cross counter flow recuperator. The exhaust
air releases heat and the external air absorbs
heat. The air ducts are separated from one
another to prevent odour pollution between
external and exhaust air.
Using suitable air ducts and adjustable air inlet
valves (accessories), the heated external air is
distributed into the house and the cooled
exhaust air is ducted out of the building.
4.3 MVHR installation planning
MVHR system designs must comply with the
current standards, good practice guidelines
and the approved edition on the original
planning consent.
Approved documents for Building Regulation in
England and Wales:
Part B:
Approved Document B (Fire Safety) -
Volume 1: Dwelling houses
Approved Document B (Fire Safety) -
Volume 2: Buildings other than dwelling
houses
Part F:
Approved Document F - Ventilation
Part L - Dwellings:
Approved Document L1A: Conservation
of fuel and power (New dwellings)
Approved Document L1B: Conservation
of fuel and power (Existing dwellings)
Part L – Buildings other than dwellings:
Approved Document L2A: Conservation of
fuel and power (New buildings other than
dwellings)
Approved Document L2B: Conservation of
fuel and power (Existing buildings other than
dwellings)
Scottish Building Standards approved
technical handbooks:
Domestic Handbook:
Section 2 – Fire
Section 3 – Environment
Section 6 – Energy
Non-domestic Handbook:
Section 2 – Fire
Section 3 – Environment
Section 6 – Energy
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