On Mon, 22 May 2017 15:26:48 +0100
"www.GymRatZ.co.uk" wrote:

On 21/05/2017 12:11, John Rumm wrote:

I found a 35kW combi will do a pair of showers concurrently. Not
going to do 4 obviously - but its unlikely in a domestic setting
that all 4 would be in use at exactly the same time.

Same findings here with a 36kW combi.

2 showers no problem. Biggest issue for me would be flow if another
tap/flush/washing-machine etc wanted water at the same time as we're
atop a hill and the waterboard won't up the pressure past 3.5 bar as
it causes problems for them down the bottom.

Can they keep it at 3.5 bar whatever your usage? If so, then you should
have no problem.

--
Davey.