New heating system Thermal store help!

[jad30]

Sorry for the long post but here goes:

I have a heat only boiler that is 20 years old, is very noisy but works. The gas check I have had in the last 2 years has show it is now longer efficient and I should consider a new boiler.

I have been think about this as I would like to lose the big water tank in the loft for more space.
But I would like to keep the hot water cylinder in the airing cupboard, as the electric immersion heater can give me hot water if the boiler breaks down which it has done 4 times in 20 years.

I don't want a Combi boiler as if it breaks down I will lose out on being able to get hot water as there is no hot water cylinder.

So I have being thinking of getting a new heat only boiler with either a Megaflow tank (or equivalent) or a Thermal store cylinder with a backup electric immersion heater on both options.

But the Megaflow system sounds dangerous due to the pressurized tank with the airing cupboard being in the centre of the house, so I'm now thinking more along the road of a Thermal store cylinder using the gas boiler as the heat source and this would also give me mains pressured hot water.

I have no previous knowledge of thermal store or how efficient it is, or how good the hot water will be when it's -5c or colder outside.

So does anyone here have a Thermal store cylinder and can answers any of my questions?

Just to add it's a 2 bedroom house with 1 bathroom, 6 radiators and we both work 9-5 5 days a week, so we only need heat and water in mornings and evenings and weekends.

Thanks for any help or alternative suggestions.

 

[Dotty]

Providing that you have sufficient flow and pressure a correctly installed unvented cylinder is your best bet. Couple this with a system boiler.

A thermal store would be overkill for what you want unless you're considering going down the renewable heat source route in the future.

You need a suitably qualified gsr with a g3 ticket to give you a quote based on your accommodation.

 

[SimonG]

Thermal store with just gas ££££££.

Unvented all the way, as long as flows and pressures are upto spec. Megaflow is a no from me. Better products on the market. May want to consider twin coil though for addition of solar at a later date.

 

[Ermintrude]

Thermal store = rubbish

Go acv

 

[Ermintrude]

Thermal store = rubbish

Go acv

 

[Nostrum]

Why change what you are happy with?

Nothing wrong with an open vent boiler and cylinder. Replace the boiler and if necessary, replace the cylinder like for like.

O.k, just read you want the space. First things first, make sure you have the flow for mains presure hot water, you may not have a choice.