Which central heating system

[Ds8854]

Hi. I am refurbishing a 2.5 bedroom, 2 bathroom flat which needs a new central heating system. It's over the top floor and loft of a Victorian house. There will be a bathroom on the lower floor and en-suite shower room in the converted loft.

Not sure what the best central heating system would be - combi boiler or a system boiler with hot and cold tanks. Can combis deal with 2 bed flats without a hot water tank. There may only be one person living there initially so seems inefficient to have a whole hot water tank.

Appreciate any advice.

Thanks

David

 

[Best]

Think the answer everybody is going to say about combi boilers is, yes, provided you choose a combi with good output for hot supply for your requirements & also if you have good pressure & flow from mains, as that's all that going to supply everything.

 

[AWheating]

whats your cold water mains pressure and flow rates? baths in bathrooms? electric or mixer showers?

 

[Halesowen1]

As Best said depends on them flow rates.

 

[fuzzy]

system boiler with hot and cold tanks????? are you sure there mate?

 

[Halesowen1]

When you say System did you mean a Regular boiler? this is very common.
Regular has tank in loft for heating where system is sealed so has a filling loop and is fed from mains.

 

[stevetheplumber]

i doubt if you have room for tanks and cylinders so id go for combi 30kw minimum although with top floor flats gas supply can be a problem

 

[radswilldo]

If you have a plan to use multiple draw-offs at once (two showers), then forget a standard combi, ring the manfacturer's if in doubt. Your options, due to space, are narrowed to either a stored combi or a system boiler with a small unvented cylinder. The stored combi will be problematic, owing to the need of 3.7-4 cubic metres of gas per hour. Also these stored combi's are high on the central heating load; even if you went for a manufacturer whose boiler's central heating output can be capped, the lowest modualting rate would still be too high leading to boiler cycling. If you go for the system boiler, a certain manufacturer allows you to set different outputs for cent heat and stored water, saving you a packet; use an S-plan system. In any case you will need high WORKING pressure at the incomming main.

 

[fuzzy]

in most cases a combi is fine as long as water pressure is decent, they were designed for situations like the one you describe

 

[sheff paul]

Hi. I am refurbishing a 2.5 bedroom, 2 bathroom flat which needs a new central heating system. It's over the top floor and loft of a Victorian house. There will be a bathroom on the lower floor and en-suite shower room in the converted loft.

Not sure what the best central heating system would be - combi boiler or a system boiler with hot and cold tanks. Can combis deal with 2 bed flats without a hot water tank. There may only be one person living there initially so seems inefficient to have a whole hot water tank.

Appreciate any advice.

Thanks

David

probably better getting a local gasafe installer round to give you some on site advice,you seem unsure about either systems

 

[Ds8854]

Thanks. British Gas do a free consult for central heating systems, so might get them round. I have an independent water supply from the mains to the flat via a 22mm pipe, but not sure what the flow rate is.

What about a combi with a pump if the pressure isn't sufficient in the loft?