All range rating does is to change the maximum output. It has no effect on the minimum.
What, even if the maximum heating requirement is below the boiler's minimum?
Vaillant 831 or 837 - advice needed!
- Thread starter vaderag
- Start date
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Their modulating controls look at the desired temperature and then at either the room or outside temperature. If there is a big difference, say 5 degrees it turns the flow temperature up to achieve the temperature as soon as possible. If the difference is minimal say 2 degrees the flow temperature will be lowered to get the same time/temperature rise. Mine often is running with a flow temperature of 40 ° (an 838 exclusive - nice but not really worth the extra £200 which could be spent on controls).
G
gasservice85
I wouldn't even consider a 831 with 2 showers a 837 might cope but I would expect poor showers if 2 going together I would reccomend a 937.
If cost is s real issue why Vaillant yes they are the best but they are also expensive
If you are regularly going to use 2 showers together a standard combi will disappoint you unles you are used to poor showers. I have 1 bathroom in my house and o have a 831 but if it were doing 2 k think I'd still be dirty when I got out
If cost is s real issue why Vaillant yes they are the best but they are also expensive
If you are regularly going to use 2 showers together a standard combi will disappoint you unles you are used to poor showers. I have 1 bathroom in my house and o have a 831 but if it were doing 2 k think I'd still be dirty when I got out
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have fitted both, and to be honest the best advice given here so far, is, if you insist that you need two showers to run at the same time then unvented or tanked water is the only real option to guarantee that that will work. the 837 is a little better with water flow rate but i feel it will struggle. it is also not really worth the extra money that you pay out (for that very reason). and also remember that your house must be capable of being supplied with the required cold water flow rate and pressure into the house to be able to achieve the figures they quote for the 837. i fitted one where the water softener was really affecting the flow rate even thought the input water rates were sufficient.
valiants are really good boilers though, even though the customer service is crap.
valiants are really good boilers though, even though the customer service is crap.
That web site is Australian although its not clear where the answers are coming from.
Australia has a water supply crisis. If you wash your car you have to put up a sign to say the water is recovered/harvested!
The reality is that people here expect about 10 li/min.
"""Our mains pressure on the cold tap is just over 15 i believe..."""
Can you explain what " 15 i " is meant to mean?
Pressure is normally measured in "Bar" ( or previously in psi ).
Tony
PS I dont understand why with only two people you cannot adjust your lifestyle to move your showers by just 5 min each so you can take them after each other.
Probably 98% of UK households only have one bathroom so most people can obviously manage.
While it's beside the point, we generally don't shower together (in fact, one bathroom is currently out of order due to having no shower screen).
But the point is that I want to be able to when we need to - not much point in having 2 bathrooms otherwise is there!?
Whilst waiting for a tyre to be fitted this fellow was also waiting who worked for one of the Midlands motorcycle manufacturers.
I asked him why bikes were allowed to make so much noise. His answer was they were subject to the same noise emissions as cars but most owners start by changing the silencer for less efficient ones!
Whilst legislation can reduce shower flow rates, no one can curb those who spend too long in the shower. I like 20 minutes minimum.
Tony
I asked him why bikes were allowed to make so much noise. His answer was they were subject to the same noise emissions as cars but most owners start by changing the silencer for less efficient ones!
Whilst legislation can reduce shower flow rates, no one can curb those who spend too long in the shower. I like 20 minutes minimum.
Tony
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