Boilers are used both for residential and for commercial purpose for central heating and hot water usage. It is one of the most widely used appliances that are used for radiant floor heating systems. A gas unit uses natural gas or propane as their fuel for burning. The general principle of how the gas system works is it extracts air required for combustion either from the heated area or from the air outside. Extracting the air from outside requires a pipe connection and it efficient and much secure.
There are four types of gas systems. They are combination boilers, Heat only gas boilers, system gas boilers, and back boilers.
Combi boilers
As the name suggest this type of system is used for both central heating and supplying hot water to taps. It is one of most widely used units in various countries. It is highly reliable and the operational costs are very low. There is no need for a storage tank as the water is supplied directly from the mains. So it consumes less space.Gas Boilers
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