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    Vaillant weather comp - lower heating curve = less gas used?

    It is a nice unit, but there are a couple of things missing - separate temperature timed programs as mentioned. I'd also like an indication of when the thermostat is requesting heat. The old stat had a little flame symbol to show this. The information is buried down in the menu, but it's a...
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    Vaillant weather comp - lower heating curve = less gas used?

    As far as I can tell, the setback temp is the "night" temp. Page 22 here: http://www.vaillant.co.uk/stepone2/data/downloads/cf/43/00/VRC%20470f%20operating%20instructions.pdf
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    Vaillant weather comp - lower heating curve = less gas used?

    Got a new EcoTec 831 boiler and the VRC470F fitted yesterday. My installer advised against it, because he'd only seen problems with them. I thought it sounded like a good idea. I had to explain heat curves to the electrician (I'm a software engineer with a maths degree so can usually work...
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