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- 17 Feb 2006
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Like the subject says.
The current situation is this:
We have a 2 year old Vaillant 837 combi. Good make, most people say. All cold water is mains fed, no tanks either hot or cold anywhere. Apart from some strange shower activity I'm happy. And the shower is due to be replaced so I'll make sure I get a combi friendly one, and maybe a pressure balancing valve.
But the planet is under stress. Me too. All my reading of solar DHW systems seems to say that they need a HW storage tank, really. And as far as using solar for CH that looks tricky, to say the least (and of course a bit nonsensical, if the sun's shining nice and bright you probably don't need to heat the house).
I see that DHW tanks are available with 2 coils. So if I used solar panels for one and the combi CH circuit for the other. Plus maybe an immersion would that work. With all the necessary controls obviously.
I'm imagining perhaps even 2 DHW circuits. Kitchen tap, hand basin taps from the Combi DHW bit, bath, shower, dishwasher, clothes washer from the tank.
I suppose there's no way of feeding water from a solar heated storage tank into the combi (no because it needs mains pressure, presumably).
Sorry it's all a bit longwinded. None of this is going to happen any time soon, but I'm in the middle of doing the bathroom, and am keen to at least prepare/alter any pipework in readiness before I seal the flour. For instance I'll be taking the pipework for the toilet to somewhere different in readiness for rainwater harvesting.
What was the question again? Oh yes, if I never use the DHW part of a combi, will it damage it?
Cheers,
The current situation is this:
We have a 2 year old Vaillant 837 combi. Good make, most people say. All cold water is mains fed, no tanks either hot or cold anywhere. Apart from some strange shower activity I'm happy. And the shower is due to be replaced so I'll make sure I get a combi friendly one, and maybe a pressure balancing valve.
But the planet is under stress. Me too. All my reading of solar DHW systems seems to say that they need a HW storage tank, really. And as far as using solar for CH that looks tricky, to say the least (and of course a bit nonsensical, if the sun's shining nice and bright you probably don't need to heat the house).
I see that DHW tanks are available with 2 coils. So if I used solar panels for one and the combi CH circuit for the other. Plus maybe an immersion would that work. With all the necessary controls obviously.
I'm imagining perhaps even 2 DHW circuits. Kitchen tap, hand basin taps from the Combi DHW bit, bath, shower, dishwasher, clothes washer from the tank.
I suppose there's no way of feeding water from a solar heated storage tank into the combi (no because it needs mains pressure, presumably).
Sorry it's all a bit longwinded. None of this is going to happen any time soon, but I'm in the middle of doing the bathroom, and am keen to at least prepare/alter any pipework in readiness before I seal the flour. For instance I'll be taking the pipework for the toilet to somewhere different in readiness for rainwater harvesting.
What was the question again? Oh yes, if I never use the DHW part of a combi, will it damage it?
Cheers,