I am considering changing hot air central heating to wet system and have
been quoted by British Gas (going to get other quotes!) for condensing
boiler (not combination). I am wondering how bad the plume of fumes from
these boilers really is and whether they make any noise (gas engineer said
they have a fan?). Many thanks for any information. I quite like the hot air
system apart from it is a little noisy and I am concerned that these are not
very popular should I wish to sell the house in the future.