Hi there
Is there any reason why you wish to stick with the Worcester brand? We do sell Worcester boilers, but we have found them to be more expensive for our customers when a different brand will deliver the same benefits for a real difference in price. Making the assumption that for a four-bedroom house you have more than 1 bathroom (an en- suite or cloakroom is considered as a second bathroom), then you definitely do need one of the more powerful boilers.
Naturally, we recommend that you go for a SEDBUK A-rated boiler to maximise efficiency and reduce your fuel spend. Remember that fuel costs have risen a great deal in the last six months, so a new boiler will pay for itself far more quickly than you think.
Take a look at the
formatting link
is a similar boiler to the Worcester and it already comes with a free standard horizonalt coaxial kit. It has a built-in 24 hour mechanical time clock (no computer parts to go wrong!) and Ariston is a trusted brand. We tend to recommend this boiler because we know that you'll be pleased with its performance and reliability. You can get this boiler for under =A3700 including VAT, whereas a quick search of the internet has shown that if you go for the Worcester, you'll pay well over a grand for the pleasure.
Worth thinking about, I think...