I hate asking the question, but here goes... it's about SIZE

[Agile]

Why do you imagine that you have lower utility bills in your current house after switching to a combi?

... because I pay the bills and keep a record of my meter readings?

Thank you for your input

I would suggest that the saving is not from having a combi but having a modern condensing boiler!

A combi and a stored system use about the same amount of gas with slightly less on a stored system.

There is no problem, properly designed, for any boiler, combi or system, to heat your house AND a cylinder.

The point most of us are trying to get you to understand is that a combi only for your hot water would be a very bad decision.

Tony

 

[jason61c]

What you want is a biomass boiler in a house that size. The RHI will probably pay you over double the install cost over 7 years...

 

[funkydiver]

I did fleetingly look at biomass, however, the fuel storage alone is impractical.

The house is big, but the grounds surrounding it are not, unfortunately.

 

[jason61c]

I did fleetingly look at biomass, however, the fuel storage alone is impractical.

The house is big, but the grounds surrounding it are not, unfortunately.

What about bags? Some are really compact, if you've got the rooms etc?

 

[roguetrader]

Just out of interest, what's the problem with the system you have? Obviously good enough to keep a business running. If its a fairly sound small commercial set up with a tired boiler, replace the boiler with (buderus) WB gb162, broag Quinta or similar, or run a couple of smaller boilers cascaded.

Not trying to teach granny to suck eggs but you won't run a house that size on buttons. Stripping out a small commercial set up in place of combis or system boilers seems strange. You idea of cost savings by fitting a combi may not have much foundation. I work on mainly larger domestic and small commercial. Bigger kit, well set up, leaves domestic for dust.
Just think carefully before letting some combi basher pull out a perfectly good system that could serve you well for many years to come.

 

[funkydiver]

The current boiler and tank are in a part of the building that has been divided off and sold. Effectively from the end of November there will be no boiler system in my part of the property. The system originally ran 42 radiators and 6 bathrooms. I didn't realise we had so many rads!!

I've spent some time today mooching around looking at the pipe work in one of the lofts (there are 4) and all the CH pipework run conveniently close to a down stairs toilet that would be perfect for which ever setup that is required. The original central heating system ran from a room next to the toilet that was demolished for a new build extension in 2004.

It'd mean shifting the loo across a bit if a sealed system tank went in (using dimensions for a Vailant uniStor boiler) however, it'd mean hooking straight into the pipe work for the rest of the system. Winner!

 

[roguetrader]

That's handy info. Yep, in that case, fit a combi.

 

[winchangoonygog]

Gasguru, Vaillant do a decent one at a fair price at moment, Muppet. Go home, size a system boiler and get back to me.

 

[funkydiver]

Dimensions as promised... come on then heating boffins.. show me the magic

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• 15 Nov 2014
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[jason61c]

on the ground floor, the rooms without sizes on what are they for? On a house that size a biomass would pay you about £5k a year for 5years index linked... you could store the pellets in a 1m square silo in the same room..... Just think about it as you'd make a fair few quid back.

 

[winchangoonygog]

Ignore the biomass tool, you have been given the info you require. End of topic.

 

[funkydiver]

I'd love to, I really wood (get it? )

BIG obstacles however... blowing £15-20k in one hit is out of the question, and lack of space is the other issue. To really get the efficiency out of one I get the feeling that buying in bulk is pretty much required, that is not an option.

The common concensus during my initial investigations on eco technologies was that if there's mains gas, there'd be little point fitting biomass. Oil or LPG, fair enough.

When we retire and move to the country, I'm sure biomass will make an entry into our lives, along with wind turbines and a field of solar panels

The rooms without dimensions are effectively unheated (or rather they are for frost protection only but they're not living rooms... laundry / workshop type rooms)

 

[jason61c]

Ignore the biomass tool, you have been given the info you require. End of topic.

Bit rude, someone just trying to point out the payments. Free heating and cash in the pocket.

 

[funkydiver]

Out of curiosity... I managed to get a quick look at the glowworm that's currently powering the system.

30kW output ... it's a Hideaway FF, and it's heating more rooms than the intended new system would be.

That would say to me that there could be an option to go higher rated combi?(which would be the ideal)

 

[Gasguru]

Gasguru, Vaillant do a decent one at a fair price at moment, Muppet. Go home, size a system boiler and get back to me.

Oh yes the good old 6 series....renowned for circulation issues due to the massive head loss across its heat exchanger, an inadequate circulator and installers inability to calculate index circuits.

And don't forget the boilers vessel is only 10 litres.