What size water heater?

[R1CKY]

I've a job to price for. I need to replace two cistern fed electric water heater and replace it with a single unvented electric water heater. It will be supplying 10 wash hand basins. It will need to be a wall hung unit, there is no room for a cylinder.

I'm thinking 60 litre, based on specs I've seen from different models. Also would somebody care to recommend me a unit?

I have my unvented ticket BTW.

 

[Dotty]

What recovery time are you wanting?

 

[R1CKY]

Doesn't have to be fantastic, it's going in a school, so how water will only be drawn off during breaks etc. Their all non-concussive taps with TMVs, so the hot water usage will be minimal.