Did you know that current building regulations state that any replacement or new gas-fired boiler must be a condensing boiler? Older boilers convert as little as 60% of the fuel they use into heat which has a big impact on your heating bills and the environment.
We specialise in the installation of condensing boilers and renewable energy products from Worcester, using the latest technology available. Modern condensing boilers improve efficiency to over 90% which could save you a minimum of 30% per year on your home heating bills, which represents a big saving over the lifetime of your boiler
Depending on your heating and hot water demand there are different types of condensing boilers that are available and we will be happy to help you make the right choice for your home or business.
Types of heating systems:
Pumped systems are the most common though the sealed system is becoming more and more popular. The water is heated by the boiler and sent round the pipework by means of a pump. The water is then routed to the radiator circuit and / or the hot water cylinder by means of a motorised valve.
Gravity fed Systems
In older properties, gravity circulation is used to heat the hot water cylinder. This works on the principal that water expands when heated. The result is that it actually weighs less than cold water. This phenomenon is very handy as the cold heavier water sinks to the bottom of the system and causes the hot water to be pushed up.
The gravity system is pretty reliable as it doesn’t have a pump. It does however need larger 28mm pipes. For best results, the cylinder is installed upstairs above the boiler.
The same water recirculates round the system. There is a ‘feed and expansion’ cistern (usually in the loft) which keeps the system topped up when water is lost by evaporation or leakage. This same cistern is also used to cope with expansion of water from the system as it heats up.
Above the cistern you’ll see a pipe which hangs over it. This is called the vent pipe and acts as a safety measure so that excess pressure can be relieved.
These are gaining in popularity now for a number of reasons. As the name implies, the system is closed and has no feed and expansion cistern. It is most common for the boiler to be a combination type rather than connected individual components. These are very efficient and have the added advantage of saving space.
A pressure vessel copes with expansion and contraction of the water. In addition there is a safety valve to relieve excess pressure instead of a vent pipe.
On the upside, these systems run at a generally higher temperature than other types and therefore radiators can be a little smaller. These systems suffer less from corrosion. The other major advantage is that not only is less pipework needed, but also no space is required in the loft for a feed and expansion cistern.
On the downside, because the system runs under pressure, the installation requires higher quality fittings to ensure leaks do not occur. Also, since the system is not automatically topped up, in addition to the thermostat, the boiler must have a safety cut out to prevent over heating in the event of water loss.
You should also consider guarding against the very hot radiators, particularly if you have young children.