coffeeking - do you have an old boiler?
No, brand new (18 months ago).
And I've never heard of this time to heat up with an elec shower, of which you talk, the one at my parents (10kW) is at temp within 10 seconds. The only drawback I ever find with elec showers is the turned it off, missed a bit of soap, turn it on - AHHHHHHHHHH hotter than the surface of the sun! - moments!
I have never used an electric shower - even the latest most powerful ones that come anywhere close to the shower on my combi boiler.
If you have a combi I can see no reason for using an electric shower
I'm sure someone on here can work out the amount of energy needed to raise water from 4 deg C to say 38 deg C at the right flow rate (6 litres per min) and will tell you that even at 10,000 watts (joules per second) you can just never reach that flow. Electric = dribble.
C
34C * 6000ml * 4.2 J/cal / 60 sec = 14280 J/sec = 14.28 kW 🙂
I make it 5.6l/min at 38C from a 9kW shower and an inlet temp of 15C. Or 6.5l/min from a 10.5kW job.
I make it 5.6l/min at 38C from a 9kW shower and an inlet temp of 15C. Or 6.5l/min from a 10.5kW job.
yeah, well, ChrisE had a much lower input temp - possibly unrealistic unless it's coming from local surface water in midwinter 🙂
Re OP, can't bar the poss easier to fit/cheaper/can have shower if boiler packs up.
New leccy shower 10.5 kw thing in spare bedroom en suite earlier in year and now new combi fed shower in new bathroom downstairs.
Ok water pressure between upstairs/downstairs may have a part to play but the combi shower walks all over the leccy one, heats up as quickly, much more powerful and probably cheaper to run.
The leccy one is like being in a facsimilie of a shower, it looks like the real thing and does an ok job but sometimes only having the original copy will do.
With a mixer valve on a combi it is always recomended to fit 8.lt flow limiters to the hot/cold inlets so the combi can modulate correctly.Mains water hot stored systems like megaflows ect do not need to be resticted.
Mixer electric you choose what best fit your requirements a bit like broadband some want it mega fast others just want to connect to the outside world.
Mira or Triton you takes your pick no good rubbihing a product without first telling us the faults you had.
Biggest problem i get with electric showers are 1,incorrect water pressure 2,blocked showerhead 3,scaling of heater and the 4th people buying the wrong product and then trying to say it is faulty.
Yes they are more prone to breakdown but 8 out 10 service calls are due to a site condition
I have never heard of that showerman - 8l min limiter on a combi. My combi produces 20l / min
