A Reznor warm air heating solution is ensuring even heat distribution throughout a refurbished Norwich factory, in spite of an unusual building design that would normally impede effective air flow.
The 3,000m² factory was gutted when the current occupier, retail display joinery manufacturer Quantum Industries Ltd, moved in. A new heating system was tailored to their specifications for a comfortable working environment with no temperature stratification.
The system had to be economical and capable of re-distributing heat from a wood burner that would otherwise be wasted, to drive running costs down further. The system also had to achieve good air flow to maintain good air quality at all times.
The building has a 7m high central section, with 8m wide / 4m high wings running down either side. Conventional heating solutions would have to deploy many units to achieve consistent warmth throughout all areas of the factory. The Reznor solution uses just six, all positioned at high level above the central section.
Reznor UDSA100 high performance downflow units were installed by M&E contractor Custance & Son Ltd of Wicklewood, Norfolk.
The heaters have two-stage burners so that once any of the six independent zones of the room approaches set-point (16°C), the adjacent heater will reduce to half-fire rate, saving running costs and energy.
More importantly, the heater’s fan continues to operate at 100% duty so the recycled heat from the waste wood burner is evenly distributed.
Destratification fans are unnecessary for this system design. Instead, the Reznor heaters are fitted with an Econostat destratifying/air recirculation thermostat that automatically kicks in the fan without the burner firing up when air in the high roof space rises above 20°C.
This has the effect of recycling warm air back down to low level. This feature eliminates the need for sophisticated ducting to redistribute recovered heat back into the factory.
Reznor UDSA heaters have an exceptionally long throw while using less fan-motor power than any other similar heater. Optimum positioning of the six heaters ensures that the entire floor area, including the extremities under the low roof section have good heat coverage.
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