Elnur CMX15 electric boiler vs Vailant Ecotec pro28?Hi

[Richie_C]

Hi everyone, i really need one of your expertise to clear something up!
which is more powerful out the two?
Obviously the electric is 15Kw maximum and the gas is 28Kw but I have read that electric is 100% efficient and gas combi can vary?
i have a three bedroom semi and want to ditch the old gravity fed system and have combi take over but I want good pressure to have a nice shower etc.
Would the electric provide enough pressure to have a nice shower or would i be better off going with the Vaillant? All running costs aside as I know electricity is deerer.
Thanks

 

[walterwhite]

Depends on the cold flow & pressure into the property. Check the tech specs of each boiler & see which delivers more....I suspect the gas boiler will be better

 

[Richie_C]

Depends on the cold flow & pressure into the property. Check the tech specs of each boiler & see which delivers more....I suspect the gas boiler will be better

Ok thanks, what shall I be looking for in particular in the tech specs to compare?

 

[SimonG]

If you have gas then use it. You need to look at the flow and pressures of your incoming water main. How many bathrooms?

 

[Richie_C]

If you have gas then use it. You need to look at the flow and pressures of your incoming water main. How many bathrooms?

Ok is there a pressure guage on the incoming water main or would this be on my boiler?
It's 1 bathroom
Thanks

 

[walterwhite]

You need to measure the flow & pressure coming in - usually easiest to do this at garden tap. Then see what the DHW flow rate is in the specs for a given temperature rise. The figures in the tech specs will assume good flow & pressure coming in. (If you only have 10 l/pm coming in you will never get 12 l/pm out)

 

[PriestyUK]

I've heard that electric boilers can be a bit expensive to run :S

Rates taken from Southern Electric : https://forms.sse.co.uk/ourprices/current/?ekfxmensel=1045_1050_1050&postcode=BH17 7XR

Single Electric Rate Pence Per kWh: 14.04

Gas Rate Pence Per kWh: 4.28

 

[Richie_C]

Ok thanks all info taken in and appreciated. I can get the cmx15 dirt cheap so that's the reason I'm considering it.

 

[quality]

To have a very good shower you would need a more traditional system with water storage of of some variant, showers fed from standard combi boilers have very limited performance

 

[Richie_C]

To have a very good shower you would need a more traditional system with water storage of of some variant, showers fed from standard combi boilers have very limited performance

Yes I understand obviously a megaflow would be the best route but that's an expensive option plus it takes up space and I've only one bathroom so probably wouldn't need more than good combi. I suppose it does also depend on what you class as a good shower as I've had a few showers at my friends house who has a Vaillant combi and I really enjoy the shower.
I wonder if the electric ones come with a small 15L integrated tank so it can maybe heat the water slightly before hand?

 

[PhoenixServices]

You will regret going electric when you get your bills. Pay more money up front and have a cheaper system to run in the long run.