Sorry not sure what you mean (I have no idea about plumbing as you can probably tell!).
I turned the kitchen tap on full for one minute and measured what came out so don't know it that is a dynamic flow rate or open pipe flow rate.
What's a break tank?
Although we have 3 bathrooms, there are only two showers and we don't tend to run these at the same time. With 3 teenagers we do have a problem with having enough hot water which is why we were considering a combi.
We get just above 13 litres per minute from the kitchen tap.
We have a 19 year old five bed house with three bathrooms - two showers. We need a new boiler as the current one isn't large enough to heat the house properly after being extended. There are 18 radiators in the house.
Should we stay with our current open vented system or go for a combi...