Heating Systems
Types of heating systems
Types of Central Heating Systems
The Conventional Heating System Requires two water tanks located high up one a Cold Water Storage Tank the other an Expansion / Feed tank, also requires a Hot Water Cylinder. The storage cylinder holds a large quantity of hot water that is available immediately (or as soon as the feed allows). However when this store has been used up it has to be reheated, this could take anything up to 1 hour. This type of system is considered the least efficient as there are heat losses from the pipe work to and from the boiler to the cylinder and the cylinder itself.
System Boiler Heating Systems
System boilers come in two types, a vented low pressure and an un-vented high pressure system. Both require a Hot Water cylinder. Vented system boilers require a storage tank but most of the other components are held in the unit itself which means that installation is quicker and cheaper. Also, the hot primary water is pumped through the system to the radiators and hot water cylinder resulting in a faster response and more economical running costs. Un-vented system boilers incorporate the equipment necessary to form a sealed system including a pressure relief valve and a pressure gauge, removing the need for a feed and expansion tank.
Combination Boiler Heating System
Systems Combi's are now the most used form of central heating boilers. Most Combi's run on mains pressure water, thus do not require tanks to be placed in the loft. They also eliminate the need for a hot water cylinder as they instantly heat the water when it is needed. Another benefit with the combi is that, due to it running from the mains water supply, you can create an effective power shower without the need for a pump. Combi boilers may not be suitable for houses where is large hot water demand or pure flow water rate.Typical 24 kw combi boiler can deliver around 9.5 l/min hot water at 35 degrees rise.
FLUE PIPE POSITIONS
A thermally controlled damper for an exhaust flue for a combustion apparatus comprising of a flue pipe having an inlet opening adapted to be connected to the exhaust flue from the combustion apparatus and an outlet opening for venting flue gases to the atmosphere.
