Commercial boilers are essentially just great big residential units. To be considered to be commercial boilers the devices must be capable of three hundred thousand British Thermal Units or more. The design of the appliance and the fuels they use to operate are basically the same as the smaller versions that are used in homes.
Commercial boilers come in different types of units just like the smaller units. The most popular devices are:
• Condensing
• Combination
• System
While each style of appliance has their own particular advantages, the most frequently installed units are condensing devices. This is partly to do with the Commercial boiler installation London fact that British law says that all new units must be of this type, except for a few rare circumstances. This law was passed because these condensing units are up to ninety percent more efficient than the earlier versions of these appliances were. They save people money on their utility bills and they save the natural resources required to make the fuels to power them, thus saving the environment.

A system boiler and a combination boiler are actually all condensing units. The biggest differences in the units is that some of them can use forced air to spread the heat throughout the structure they are installed in, and some of them produce steam that is piped throughout the structure.
Forced air units require the structure to have duct work in the walls or in the ceiling of the structure. The duct work connects to the unit. These appliances also have air returns and they must have filters on them. The filters are designed to trap any allergens, dust particles, or other contaminants found in the air and therefore provide a cleaner air through the vents.
Forced air is the best choice when you need a cooling system and a heating system that is combined. The temperature of each area in the structure can be controlled by dialing a setting on a thermostat. The thermostat control will tell the unit when to provide more heat or when to shut down. There will also be vents in the different rooms that can be opened or closed as needed. If an office space or a conference room is rarely used the vents can be closed so that the appliance does not have to heat or cool this area. When the room is going to be used the vents can be opened beforehand so that the temperature can reach the desired range. Forced air units are quicker at lowering and raising the temperatures in a room than any other Commercial boiler installation London type of appliance is.
Steam units take the water in the system and heat it until it produces steam. The steam is piped throughout the area in pipes to radiators. The radiators are what release the heat into the interior room. These units are not as efficient as the forced air units. Commercial applications that require an air conditioning system would have to install a separate device for this purpose, and separate duct work to carry the air to the different rooms of the structure.