We moved our boiler into the loft when we had a loft conversion last year, there's probably a couple of seconds difference in the time it takes the hot water to come on in the kitchen but I can't say I really notice. getting the thing out of the way of living space is far more important imo.
Combi boiler in loft of a two storey terrace house. Will I curse the slow-to-get-hot kitchen tap, or is it fine and will save space & flue woes?