Reznor UK - A hall of two halves, heated by Reznor
Two external Reznor heating and ventilation units and
two internal Air Mixing ducts have given Cranford
Community College in Hounslow total control over their
heating their sports hall, whether the whole or either
half of the space is being used for sports, or if either
is used as an examinations room.
The sports hall was previously heated by a 25-year old
system that had performance limitations, namely that it
was incapable of providing ventilation and, when a
temporary partition was used to sub-divide the hall for
use with small groups, the whole of the interior had to
be heated, with consequent excessive energy use and
costs.
A single cost-effective solution was sought by the
London Borough of Hounslow to maintain comfort
conditions within the sports hall during active use. The
main requirements were low noise levels, uniform heating
and ventilation for comfort and odour control the length
and breadth of the hall, and minimal serviceable
equipment within the hall itself. The heating system
also had to be accessible and simple to maintain.
In a solution designed by Reznor and installed by
Fulwood Building Services Engineering, two
weatherproofed high-efficiency RPVE heating and
ventilation units were mounted externally, each capable
of independently providing comfort to their respective
halves of the hall. The equipment can be maintained
without disruption to activities within the hall.
Inside the hall, Air Mixing ductwork was installed to
distribute a combination of fresh and recirculated
filtered air. The Air Mixing ducts run the length of the
hall, suspended from the ceiling. Warmed or fresh air is
ducted from the external units through the duct and is
forced out of the thousands of tiny perforations along
its length. Uniform distribution of air and a very high
rate of secondary air entrainment is achieved, virtually
eliminating vertical temperature stratification. This
helps minimise fuel usage and reduce running costs.
Air passes out of the Air Mixing duct at very low
velocity. Sports such as badminton are therefore
unaffected by the relative air movement.
The flexible pvc duct absorbs sound, rather than
reflecting or transmitting it as a conventional metal
ducting system would. The RPVE air handling units and
Air Mixing are an acoustically quiet combination, so
additional attenuation is unnecessary.
The Reznor system has key advantages over other forms of
sports hall heating, in particular underfloor heating,
which will always require additional supplementary
ventilation, adding to running costs. The Reznor heater
used in conjunction with Air Mixing reduces energy use
and running costs because heat is continually recycled
back to lower level where it is needed, often without
the burner firing.
By combining heat and ventilation through the same
system, the client has total control over the internal
conditions, even when only half the hall is in use. The
heaters are sized to provide the fresh air need of the
maximum likely number of occupants, not just to meet the
heat losses of the building.
Email:
sarah.gill@blinkgroup.co.uk
Arundel Jones Associates Ltd
Hill Farm, Linton Hill, Maidstone, Kent ME17 4AL
Tel : 01622 745333
news@buildingdesign.co.uk
Registered in England and Wales No. 07334149
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