Combi boilers with built in hot/water store

[darren bastin]

Hi , I need to quote on a replacement for an old glowworm xtrafast 96 which is a high delivery combi. I only have 470mm outside wall to mount the replacement on which rules out a vitodens 111w and a glowworm 35 which are both too wide. The vaillant 938 is only 440mm wide, can anyone recommend a similar product with a comparable h/w delivery of around 20 lit pm ?

 

[Gasmk1]

vaillant is also 600mm deep but will only deliver 15 ltr/min, you may need to find an alternative position to facilitate the fitting of the 111 the glowworm is only 14.5 ltr/min. or a system/regular boiler with an unvented cylinder the xtrafast didnt give 20 lt./min max 16.5 lt./min

 

[ShaunCorbs]

as above also whats the incoming pressure and flow rate ?

 

[darren bastin]

The mains pressure is over 4 bar, did not measure the flow. The depth is not a problem. Re-siting is, the house has been systematically upgraded, the old combi is in a cupboard which is long enough for a conventional boiler and unvented cylinder which the house cries out for. However I can only find super slimline cylinders t0 450mm. Basically I am stuck with a storage combi and re-running a larger gas main outside the house. I have looked up the ultrafast and the vaillant would outperform it and give more heating output. I just wondered if there were any alternatives, I fitted three of the 937s` when they first came out and had a few issues with there reliability. I am sure the 938 with store manufacturers info states it is capable of 200 lit in 10 mins then drops down to what the combi on its own can do.

 

[lame plumber]

200 litres storage, go unvented.... sod hanging that on a wall

 

[thereisawizza]

The mains pressure is over 4 bar, did not measure the flow. The depth is not a problem. Re-siting is, the house has been systematically upgraded, the old combi is in a cupboard which is long enough for a conventional boiler and unvented cylinder which the house cries out for. However I can only find super slimline cylinders t0 450mm. Basically I am stuck with a storage combi and re-running a larger gas main outside the house. I have looked up the ultrafast and the vaillant would outperform it and give more heating output. I just wondered if there were any alternatives, I fitted three of the 937s` when they first came out and had a few issues with there reliability. I am sure the 938 with store manufacturers info states it is capable of 200 lit in 10 mins then drops down to what the combi on its own can do.

Oso do a 430mm slimline. They also have a replaceable anode....

And yes, sod hanging a big bu%$er on the wall; fitted a Glow-Worm 35 store the other week, never again.....

 

[ShaunCorbs]

Oso do a 430mm slimline. They also have a replaceable anode....

And yes, sod hanging a big bu%$er on the wall; fitted a Glow-Worm 35 store the other week, never again.....

i remember my first still

 

[lame plumber]

i remember my first still

bit like your first fat girl ...