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Heating & Hot Water Systems (Types (Heat Pumps (Air -Source, Ground…
Heating & Hot Water Systems
Boiler Types
Worcester Guide
Regular (Conventional)
Regular boilers produce hot water that heats the radiators directly and they also provide hot water which is stored in a cylinder (often seen in the airing cupboard).
The boiler gets the cold water feed from a storage tank (called a feed and expansion tank) which is usually located above the boiler, in the attic.
Because the tank is higher than the boiler, the water is fed to the boiler by gravity. This tank not only feeds the boiler, it also acts as an 'expansion' tank. Water expands as it is heated and any excess hot water flows from the central heating system back into the 'feed and expansion' tank.
System (Condensing?)
System boilers require a cylinder for storing hot water, however the major heating and hot water system components are built into the boiler itself, making it quicker and easier to install.
In addition, there is no need for a tank in the loft, so it can be an option in a home with little or no loft space or where the space is earmarked for a conversion.
Combi (Combination)
A combination or ‘combi’ boiler is both a high efficiency water heater and a central heating boiler in a single compact unit. Combi boilers heat water directly from the mains when you turn on a tap, so you won’t need a hot water storage cylinder or a cold water storage tank in the roof space.
They are also very cost-effective and energy-efficient as water is heated instantly rather than being heated and then stored in a cylinder. An added benefit is that hot water is delivered at mains pressure, which means that you could get a powerful shower without the need for a separate pump.
Types
Wet central heating with radiators in every room
Open-vented system
Sealed System
Storage heaters
Open fires / solid fuel
Underfloor heating
Electric
Water
Heat Pumps
Air -Source
Ground-Source
Water-Source
Biofuel
Flue Types
Open Flue
Balanced Flue
Hot water cylinder types
Vented Direct Cylinder
Vented Indirect Cylinder
Vented Thermal Store Cylinder
Unvented Cylinder
Controls
Timers
Programmers
Thermostats
Nest
Hive
Drayton
Motorised Valves
Control
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