Warm Air Heating
Warm air heating works by passing the air within a building over a heat exchanger, heating it and then distributing it evenly throughout a building.
- The most widely used form of industrial heating and is compatible with the majority of building types and applications.
- Most effective in buildings with 1½ air changes per hour or less (most industrial units have ¼ to 1 natural air changes per hour), and where the overall building height does not exceed 15m.
- Ideal for buildings requiring frost protection for stock or sprinkler systems.
- Suitable for warehouses, retail premises, showrooms, factories and many other commercial applications.
- Low capital outlay and running costs.
- Easy to maintain.
- Even and comfortable heat distribution throughout the building, especially when used in conjunction with energy saving de-stratification fans.
- Can be ducted to provide heat to adjacent separated areas.
- Can provide summer ventilation.
- Can be used as part of a tailored air handling unit to provide heating, cooling and fresh air.
- Floor standing, suspended and ducted models available.
- Heat outputs from 7 to 144 kW (suspended heaters) and 30 to 381 kW (floor standing heaters).
- Available in natural gas, oil and LPG.
- Energy-efficient models eligible for the Government’s tax saving Enhanced Capital Allowance (ECA) Scheme. Also low carbon dioxide and NOx emissions.
- Room sealed options available for buildings with dusty or contaminated environments.
- Available from all main manufacturers – Benson, Reznor, Powrmatic, Combat.
Radiant heaters directly warm surfaces and objects below them, such as people and machinery. These surfaces then act as secondary heat emitters and raise the air temperature around them. As with light, radiant heating can be directed to concentrate the heat where required.
- Ideal for poorly insulated buildings with high heat losses, such as garden centres and glasshouses.
- Ideal for buildings with high air change rates, such as loading bays where roller shutter doors are often opened, or buildings with high rates of mechanical extract.
- Used in high buildings such as sports halls and aircraft hangers because they do not have to heat the whole volume of air within the building to create a comfortable environment.
- Can also be used to spot heat a small area within a large building.
- Good flexibility in system design
- Inexpensive to install with low running and maintenance costs.
- Short warm up period with no energy wasted heating up the air in the building before occupancy.
- Only the working area is heated – no heat losses in the roof space.
- Comfort conditions are achieved at lower temperatures.
- No movement of air to stir up dust or cause discomfort.
- Radiant plaque or tube heaters available.
- Heat outputs from 7 to 94 kW.
- Available in natural gas and LPG.
- Mounting heights up to 15m.
- Heaters can be made to be room sealed for buildings with dusty or contaminated environments.
- Available from all main manufacturers – Ambirad, Spaceray, Blackheat.
Traditionally offices are heated by central heating systems with a central boiler feeding a series of radiators or fan convectors throughout the offices. These can also be used to provide the hot water requirements through the use of a hot water cylinder or combination boiler.
Recent developments have seen office underfloor heating becoming more popular which, although more expensive than traditional systems, provide a pleasant constant temperature without the loss of valuable office wall space.
The push for higher efficiency has seen energy efficient condensing boilers becoming widespread. Other innovations in system design and energy saving controls have developed to further reduce running costs.
Another different form of office heating is provided by air conditioning units with heat pumps. These provide both winter heating and comfort cooling in summer, with new inverter models being highly efficient in both heating and cooling modes.
Another form of heating requirement in the industrial sector is that of process heating to provide the heated water necessary in many manufacturing processes, with boilers ranging from small domestic sized to huge purpose-built ones with outputs of thousands of kW’s.