Combi with a 300 litre hot water tank

[PEG]

Hi,just out of curiosity,how many Kw is the combi boiler?

 

[Chris Hex]

Hi,just out of curiosity,how many Kw is the combi boiler?

I didn't look, left it to the Gas safe guy.

 

[snowhead]

I think the landlord has got bad advice. It's a 6 bed HMO,

If the Landlord has other HMOs then they probably have the best idea of what suits that type of property.

 

[Chris Hex]

If the Landlord has other HMOs then they probably have the best idea of what suits that type of property.

It's his first so I think he has got confused advice. I have a couple of HMO's with a business partner. We use a 300 litre tank when we have 5 ensuites with showers. 2 run off electric leaving the 300 litres tank to deal with the remaining 3 showers. We use a system boiler instead of a combi.

 

[Wilko]

Using a combi to run multiple showers is not going to work for the tenants, I would have thought.

 

[MJPD29]

Sure the combi heats the water as required and the stat doesn't need to call for it? Unless I am missing something

 

[Wilko]

It will depend on the HW flow rate of the combi they've picked. A good one will run a shower fine, but maybe not 2 or 3. Could try restrictors on the showers to get over this I guess (?).

 

[Leesparkykent]

combi boilers, imo are useless with more than 1 shower.

 

[David M]

It will depend on the HW flow rate of the combi they've picked. A good one will run a shower fine, but maybe not 2 or 3. Could try restrictors on the showers to get over this I guess (?).

Won't make much difference, you just can't get the volume of water required because of the way instant hot water systems work.

 

[David M]

Using a combi to run multiple showers is not going to work for the tenants, I would have thought.

Correct, you wouldn't spec a combi boiler for multiple showers that are likely to be used simultaneously. A pressurized system boiler with suitably sized hot water storage tank is going to be more cost effective and better for the job.