Old Ducted air system needs replacing. Advice.

[AndyM53]

My ducted heating system is now about 25 years old and is a bit under spec'd for a few reasons.
I extended the house several years ago to double the size but did not extend the heating into this. Instead I use Electric underfloor in my kitchen, electric Towel rail in the new bathroom. New bedroom has no heating. I am also using the immersion for all of my hot water as the gas one with the warm air boiler is not man enough now we have 5 adults in the house. I am paying about £140 and £110 PCM for Electric and Gas. I guess looking at the above, it is worth installing a complete new radiator Gas system but is it possible to do or worth doing a partial install first (Just hot water) and then finishing off the rads at a later date to spread the cost? I can't do credit right now.
Cheers

 

[lame plumber]

if you install an intergas combi then that will provide hw ok umtil you can afford to bolt on the heating later on. some will say you might need a cyl type sytem to cope with 5 adults but depends on the no of bathrooms you have and if u use electric showers in any of them etc. the other thing is you csan convert a combi to run a cyl type set up later on if you wish with out the need to change the boiler.

 

[AndyM53]

Thanks for the quick reply Mr Lame.
OK. Two bathrooms neither with electric showers. I think I'll go for the tank option.
Good news that I can split the install. Hopefully the monthly bills may go down too.
Cheers.

 

[Killy Bing]

Andy where are you based?

As said you could replace the cylinder with an intergas combi and install the radiators at a later date.

or you could hook the cylinder up to be run from the new combi but it woulden't be a huge gain over your old circulator unit.

there is a product where you can run a warm air system from a regular heat only/system/combi boiler
which would allow you to continue to use the warm air system should the current unit go pop!

what i would personally do is.

Remove cylinder and install the combi boiler above its position, allowing for in the future to install an unvented cylinder below when funds allow.

install new radiators to the newer areas and continue to use the warm air system for the others.

when the warm air unit breaks down replace with the water to air unit i mentioned above.

thats what i would do, but i'll put money it differs from most peoples views!

 

[Reg Man]

Quote> I am paying about £140 and £110 PCM for Electric and Gas.<Quote. That don't sound to bad, depending on the House volume. Must admit you could do with an upgrade to something a little less bits and pieces. Air source heat pump with under floor heating and PV panels on roof to help keep the lece bill down?