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LEADING SUPPLIERS AND MANUFACTURERS OF QUALITY ELECTRIC HEATING, VENTILATION AND ENERGY EFFICIENT SYSTEMS
Ph: 0800 379 247 |
Heating & Ventilating Large Spaces | Example Solutions | Case Studies
HEATING & VENTILATING LARGE SPACES
Heating & Ventilation Solutions for Large Buildings
(Halls, Gymnasia, Factories, Warehouses etc)
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Ineffective Systems
Many buildings today have 'ventilation' systems consisting only of exhaust fans,
either roof mounted, through the wall, or a combination of the two. These are not
efficient, controlled ventilation systems as they make no provision for the introduction
of fresh air, and may not comply with the 1992 Building Code or NZS4303 standard
"Ventilation for Acceptable Indoor Air Quality".
Even with multiple exhaust fans 'dead spots' can still be a problem |
Inadequate provision for "make-up" air - most unsatisfactory or even
unhygienic sources:
Unsatisfactory Supply Source
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Effective Ventilation
The system illustrated above will effectively ventilate the space, providing acceptable
Indoor Air Quality and helping to control condensation, but the infra-red heating system
cannot maintain comfort temperatures and the ventilated space will be cold.
Direct hot air is the best option for heating spaces with high occupancy, eg churches,
school classrooms, clubs & bars. |
Installing 'Tempering Elements' controls the temperature of incoming fresh air. Avon
ELECTRODUCT elements automatically controlled by a 3 stage thermostat can be retrofitted
into an existing system or designed into a new one. Avon SUPERFAN Heaters can
replace the supply fan and tempering elements (see below).Heat Recovery Ventilation
for Energy Efficiency
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Heat energy (which is normally wasted) from the Exhaust air stream, is transferred and
re-cycled to the incoming fresh air. Energy savings of 50 - 70% are easily
achieved.
Note: preheated supply air is also dehumidified by the heat exchange process. In
summer indirect evaporative cooling provides cooling without dehumidification.
Avon Electric Ltd is the sole NZ agent for HEATEX Air to Air Heat Exchangers, Sweden.
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Heating and Ventilation Solutions with an Avon SUPERFAN Heater.
A Simple Solution
This method will effectively heat, ventilate and control condensation, but wastes energy
as it is poorly controlled ventilation.
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Simple, Effective, Heating and Ventilation.
Note fresh air roof intake, also available with wall intake and weatherproof
cowl.
The motorised damper to provides two modes of operation - 100% fresh air and
recirculated air.
Use RECIRC for pre-heating and low occupancy periods and FRESH for periods of high
occupancy. |
Matching the Exhaust Fan
Illustration shows wall intake with cowl, roof intake also available.
Avon also manufacture exhaust air handlers with identical capacities to the SUPERFAN
heater. They are ultra-quiet and wiring circuitry is compatible with the SUPERFAN
heater, so a single speed control switch can control both heater (Supply air) and Exhaust
air handler. |
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