Recent content by vxxbcks

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    My neighbors gas flue plumes directly into our garden.

    Seems like it needs a plume kit to follow the roof line then go up vertical some distance and maybe angled opposite to the path to the window at the terminal.
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    Vaillant Vertical Flue, rain ingress

    They certainly used to do a 90° elbow with a wire spring guard in it.
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    Plumbing quote

    Same, had it years and years. Has easily paid for itself in electricity savings.
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    Bathroom Extractor Duct Noise Fluting etc..

    connect the fan with a short length of flexi and maybe pad the box with at least 1" of fiberous material around the duct to act an an absorber.
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    Bathroom Extractor Duct Noise Fluting etc..

    Is this in attic space?
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    Vaillant Ecotec Plus 618 Ambi Sense thermostats

    It's not as black and white. The VR700 will show "off" unless the VR920 is calling for heat. The VR920 will call for heat if the temperature is below the set point of any room yes, but also if the temperature is falling towards a set point and/or rising slightly above it. The highest configured...
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    Vaillant Ecotec Plus 618 Ambi Sense thermostats

    The vr700 program doesn't matter. The 21° is coming from something set in the Ambisense.
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    Plumbing quote

    Sounds like a lot of work. Is this in copper or plastic? Get a heat-pump tumble drier, needs no vent and uses 1/3rd of the electricity. Why the electric UFL?
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    Vaillant Ecotec Plus 618 Ambi Sense thermostats

    In the '700 installer level (passcode 000), system config. What do you currently have for: Room Temp Modulation Zone Assignment (near the bottom of the list) The '700 will display the highest called for room temp, as set on the Ambisense. If you change it on the '700, the '920 will overwrite...
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    Google Nest Install - Air Source Heat Pump

    Also the ASHP will need awareness of outside and inside temperatures to operate efficiency so 3rd party controls are likely sub-optimal.
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    Central Heating - big noise when turning off

    The clunk is probably a moterised diverter or zone valve. Some do and the only solution is to replace it.
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    Vaillant Ecotec Plus 618 Ambi Sense thermostats

    Do you have a VRC700 controller?
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    Grundfos ups2/8 proportional pressure

    press and hold for 3 seconds to change from fixed speed to pp/cp. Constant speed - LED is continuous. PP - LED short flashes CP - LED long flashes
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    Air Source or Ground Source Heat Pump

    Electricity ~15p per kWhr, gas 2.9p. Design flow 35°C, R290 systems SCOP > 4.8, effective cost per kWhr ~3.1p. ASHP unlikely to achieve that number in practice, but neither is gas boiler 100% efficient; differential is small and that's before the government consider how to get to net-zero, i.e...
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    Drayton Wiser and Vaillant Boiler

    if you fit the Ecotec with a weather compensating control, this will reduce the flow temps most the time and hence reduce the cycling requirements from the Wiser. Another option is to fit a time-delay relay to eliminate short cycles then set it to electric mode.
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