Electric or Gas Water Cylinder?

[Indi.Singh]

Until my recent extension, I lived in a 3 bed detached and had a worcester 30CDI combi boiler. However, with the extension the house has increased to 5 bedrooms with an additional ensuite and downstairs wc. Historically the water pressure would reduce if you were having a shower and washing the pots at the same time. I am planning to put in a Gledhill Vented Direct Cylinder SL210 (similar to a Megaflow but I think an alternative manufacturer).
My concern is that the cyclinder is using electricity and not gas, is this going to cost me more in running costs? I have not had this fitted and so can change if decide soon.
Also, I am assuming that my combi boiler will be suffice to meet the heating requirements for the house, what do you think?
Thanks for your help.

 

[Blackcatgas]

Why not run the unvented off the combi, you could run the combi as a s plan with 2 2 port valves one to split it to the heating and 1 to split it to the hot water, run the kitchen sink hot water and the existing side of the house off the combi hotwater and the new ensuite off the cylinder, then use the immersion heater on the cylinder as back up.

 

[Indi.Singh]

Blackcatgas

Thanks for your reply. Having the immersion as a back up sounds like a very good idea. The cylinder we have at present is a vented (with a thermostat I understand) could I still use the boiler and set it up as a s plan. Would the Gledhill model I mentioned allow me to do this?

In terms of running cost would the gas be cheaper than the electricity?

Once again thanks for your response.

Indi

 

[Blackcatgas]

Its more likely that you have a 30cdi system boiler ,if you currently have a vented cylinder it is unlikely that you have a combi, unless if been piped up as Ive said? in which case put in an unvented cylinder assuming you have enough flow rate and pressur in your mains, the cylinder you mention is DIRECT, this doesnt have a coil so cannot be connected to the boiler. I dont know the difference between unit costs between leccy and gas, however even with 2 immersions you will only get 6kw to heat the cylinder, a modern cylinder with a big 20kw coil with give you much quicker hot water recovery.