When getting a quote from a company or an individual please check their credentials. If damage is caused to your property due to a sub standard installation and you can’t get hold of the installer the likelyhood that your insurance will pay for rectifying the works is highly unlikely.
We install all new condensing gas boilers. The choices can be confusing for customers so we will try and explain the options below.
Open vented system boiler
This is where you have a small tank in the loft called and F/E tank (fill and expansion) which is filled via mains cold water supply and is attached via pipe work to your heating system. There is a pipe off of your heating return which is open ended and vents into the tank . The boiler has two pipes called heating flow and return. There is a series of actuator valves connected the pipe work, these operate via controls and thermostats. One will operate via the room thermostat and the other via you cylider thermostat. These are simple systems with a lot of controls valves and can be costly should they break down. One advantage is a booster pump can be used to increase the pressure for showers or bath showers.
Sealed system boiler
Similar to the above , the difference is there is no F/E tank or open vent. These are replaced by a pressure vessel and the system is filled via a filling loop. The controls remain the same, a choice of a three port valve to control the heating and hot water coil may be utilised.
Combination boilerCombination boilers are totally different to the above as the boiler encompasses the pressure vessel and the controls within the unit. Here there are six pipes connecting to the boiler, heating flow and return, mains cold water, hot water outlet, gas and a condense pipe which needs to be connected to an internal drain via a trap. The flue produces a plume of burnt gases which if installed incorrectly can create a nuisance.
The disadvantages of a combination boiler are as follows:
No booster pump can be installed for showers or multiple bathrooms.
There is a drop in volume when more than one water source is used when drawing hot water.
Radiators work on convection, as heat rises it draws in the cold air which circulates around the radiator. They have been used in nearly all older properties and are readily available and are reasonably priced.
Pipe work layed in trays
Pipe work being covered with a liquid screed
Underfloor heating works like a large radiator and entails running pipes beneath the floor boards or screeding. The system when installedcorrectly is highly efficient and can cut down on fuel bills. The initial costs can deter some customers butthe long term benefits are rewarding.
Manifold connecting all heating zones