On Sat, 01 Feb 2020 17:21:23 +0000, Tim+ wrote:

You can get horizontal unvented cylinders if lack of headroom is
limiting your choice of cylinder capacity. No idea how they compare
price wise but I would expect them to be more expensive just because
demand is lower.
Still, it might give you more options.

Eg.
https://www.kingspan.com/gb/en-gb/pr...ders/unvented-
hot-water-cylinders/ultrasteel-horizontal-indirect-cylinders

Tim

Thanks but headroom is not a problem.