• 10 Tips Before Fitting A New Boiler

  • New Boilers

    If your reading this your probably either in the process of getting a new boiler installed or you’re considering it,

    either way it’s a huge financial commitment,

    so being well-educated on the matter is always a good idea,

    on that note i have compiled a check list and you should,

    outlining what you should know/consider before going through the mundane task of getting estimates.Boiler

    What size boiler do you need?

    • The average combination boiler comes in one of four sizes 24kw , 28-30kw, 30-37kw and 40kw, as a
    • rule of thumb a 24 is ideal for most flats and any smallish 2-3 bed house with anything roughly up to 10 radiators,
    • a 28-30 would be for a medium to large 3-4 bed house with up to 15 radiators, a 30-37 and a 40 kw
    • would be for a large house with anything up to 20 radiators. For hot water the
    • higher demand (how much hot water you use) the higher kw (kilowatt) boiler required,
    • however no combination boiler will cope with 2 showers running at the same time,

    • don’t take these figures as gospel they are just a guideline before getting your quotes in.
    • The most a combination boiler can give on hot water is around 16 liters of water per minute

    Location Of The Boiler

    • The easiest and cheapest place for any boiler to be installed is in the same location as the old one,
    • the reason for this is that the pipes are all in the vicinity,
    • if your going from a combi to a combi then every pipe will be there,
    • however if you’re converting from a system boiler to a combi( a system with a hot water cylinder and header tank),
    • there is a good chance that the cold and hot water pipes will have to be “run” to the new boiler.
    • A boiler can basically be installed on any wall as long as its near an outside wall in

    • order for the flue to exit and a drain (explained later), also needed are gas,flow and return(radiator pipes), hot and cold water pipes.

    A pipe must leave the boiler and exit in to a drain.Boiler

    • All boilers by law must have a sedbuk efficiency rating of A or B, this means that they
    • must be “condensing”, all condensing boiler’s produce condensation,
    • this condensation leaves the boiler (in liquid form, Water) via a waste pipe, this waste
    • pipe must exit in to a drain, either an outside drain or it can “tap” in to a
    • sink/bath/washing machine waste inside the property, the pipe must have a downward slope of at least 5%.

    What Brand and make of boiler to choose?

    • I recommend 5 boilers to my customers , Vaillant Eco-Tec ,Worcester junior ,Baxi duo-tec and platinum and the Ideal Logic+.
    • I don’t think you will go far wrong with any of the boilers mentioned,
    • the Vaillant and Worcester are the most
    • expensive but only come with a 2 year warranty, ( Update See Below)the Ideal Logic is the cheapest of the 5 but comes with a 5 year warranty,
    • I recommend getting some brochures (give me a call if you would like me to send you some) and really doing your research,
    • but like i said any of the 5 i am happy to recommend.
    • We now offer a 7 Year warranty on the

    • Vaillant Eco-Tec Plus and 5 Years on the Pro version.

    What size is my gas pipe?

    • If you’re a bit of a do it yourself  with this sort of thing, or you have access to your old boilers installation
    • instructions, then check the size of the gas pipe pip going in to the boiler it should be 22mm thick, if its 15mm
    • thick it may need to be increased, make sure you ask the installer doing your quote to tell you the
    • size, as your new boiler may not function properly if it’s too small.

    What thermostat controls do i need?

    • With any new central heating system you must have a minimum of a room stat, the cheapest and best
    • option is a wireless room stat. contrary to popular belief there are no laws stating that you must have thermostat radiator
    • valves ( i have contacted gas safe and had this confirmed),
    • what they say is that an installer should recommend them, to a
    • customer and quote for them, but you don’t have to
    • have them, but i do advise getting them installed in bedrooms at least.

    Getting the system flushed.

    • Your warranty will be void if your new boiler becomes damaged because of sludge from your system. To prevent this the system must be flushed, it’s also advisable to get a central heating filter installed which will help combat sludge build up for as long as its installed. I recommend MagnaClean Professional they fit inline on the boiler return pipe.

    Water pressure. Every combi boiler needs a minimum cold water flow rate requirement, it is vital that this is tested prior to the new boiler being installed

    How long will it take? Boiler

    • An average combi to combi exchange will take 6-10 hours (normally done in one day) a conversion (system boiler to combi) would normally take 2-3 days, so be prepared for at least one night without hot water or heating if getting a conversion

    How much will it cost?

    • The question everybody wants to know, as a rough guide a combi – combi exchange will cost between £1600 and £2600(inc vat) depending on size and type of boiler a conversion will be between £2200 and £3500(inc vat) this is a guide for London companies if you live in the north of the country then you can probably find it a little cheaper.

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