Instant water heaters and storage water heater advice required.

[supergas]

Hi Guys

I have been tasked with sourcing some water heaters to be used in various function rooms, I have unvented ticket but have never installed or had any dealings in water heaters. Any advice or guidance is appreciated.

1, clinical room basin, this will be located in the adjoining room on the opposite side of all as the basin and must deliver 55° and will be feeding a single point basin
Can anyone advise on a suitable product.
I'm hoping this can be done with a non storage heater as its on the 1st floor and routing a prv will be a headache as its a walkway below and access will be a problem but not impossible..

2, accessible Wc room, this requires a single point water heater to serve a hand wash basin. To be wall mounted below the basin.

3, multi point water heater to serve a cleaners sink, wc room wash hand basin, these will likely not be used at the same time.
Can anyone advise a product that works as advertised and will perform. This will be mounted at high level between the two rooms.

Also do these basin sinks need a tmv valves after the heater? I am told conflicting information on this, but is feel they should have one.

Thanks.

 

[Madrab]

Can anyone advise on a suitable product. I'm hoping this can be done with a non storage heater as its on the 1st floor

Depends on use/required workload. Non storage Instantaneous heaters can be very low flow, that reduces in winter as the mains water temp drops, work just like an electric shower with typically the same energy requirements - 7>10Kw - will obviously need a suitable power supply. Would need to know required output requirements for the clinic to see if that would be suitable and some of these do now have an PRV for expansion control.

Multipoint Storage, up to 30L, depending on location all have T&PRV's and will require suitable termination points.

There are also over the sink, single handwashing outlets but these are usually limited to around 50deg, these again come in multiple input rating from 3Kw up to around 7Kw which again will determine output.

TMV's will be required if the temp @ the outlet would exceed 50Deg especially in a commercial setting so depending on the solution one may be needed to meet the regs.