Commercial heating
Heating for the workshop
When designing a heating system for a workshop there are a number of things to consider that may not apply for other types of heating project. There are key factors to consider according to Brett Smith of Powrmatic
E
nsuring a workshop remains comfortable can be quite a challenge and the best
solution will depend on the size and layout of the space, the building’s construction and how the building is used. Other factors, such as the potential for build-up of explosive vapours, may also need to be considered.
In terms of heating technology, the
choice usually comes down to either radiant heating or warm air heating – the best option being determined by the parameters mentioned above. For example, buildings with
reasonable or good insulation typically favour warm air as the installed load is generally significantly lower, with a commensurate reduction in fuel costs. Conversely, poorly insulated buildings can benefit from radiant heat, especially if the doors are opened and closed regularly. At the risk of ‘teaching HVR
readers to suck eggs’ it’s worth considering the key differences between these types of heating.
Radiant heating
With radiant heating, radiated heat from a hot surface passes through the air and raises the temperature of any solid objects (people, machinery etc.) it encounters. The temperature of the surrounding air is not raised by this process, though as machines and building surfaces warm up they
28 November 2017 Brett Smith of Powrmatic
will begin to warm the air slightly. Consequently, radiant heating is subject to ‘shading’ effects, so that people to be warmed need to be in ‘direct line of sight’ so if there is potential for shading by vehicles or machines, radiant heating is unlikely to be the best option. However, if there are high levels of air infiltration, radiant heating may be the best option, as it doesn’t heat the air.
Warm air heating
Warm air heating is the most common choice for workshops. Warm air heaters draw in air from the space and pass it across a heat exchanger to warm it. The heat source can be a burner in the unit fuelled by natural gas, LPG or oil, an electric element or hot water emitter supplied from a boiler elsewhere in the building.
www.heatingandventilating.net
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