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  1. M

    Types of 3 way diverter valves???

    Hi Everyone, I have a question with regards to a specific requirement I have for an electric 3 way diverter 28mm valve on an ASHP installation? As far as I know most 3 way valves are configured so the flow comes into the bottom of the 3 way valve (Inlet: C) and then the water either flows out...
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    DN Pipe size help???

    Hi All, Can someone help me identificere What size DN pipe diameter the below stainless steel flex hose is? I dont usually work with this type of flex hose and due to the corrigation i am not sure What size annular fitting I need? Is it based on the internal bore size of the external...
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    Shortening a Flex Stainless Steel Pipe for ASHP?

    Hi Everyone, I was wondering if anyone knows of a way to shorten a flexible stainless steel flex hose for a Vaillant ASHP? I have previously purchased flex connection hoses from Vaillant that could be shortened using a circlip, but it would appear that they have changed their manufacturing...
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    Vaillant VR33 OpenTherm Module with AroTherm Plus ASHP???

    Hi All, I am curious to hear if anyone knows if the Vaillant VR33 Module that can be used to convert Vaillant Boilers to support OpenTherm also works together with the Vaillant AroTherm ASHP range? As far as I can understand Vaillant uses a very old protocol (eBus) for communications between...
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    Calculate ROI for a custom Unvented Indirect Heat Pump Cylinder???

    I am considering using a custom built heat pump cylinder with a dual coil setup to maximize the heat transfer from Heat Pump to the DHW Cylinder. Ideally you want to run a heat pump at as low a flow temperature as possible to maximize the SCOP. Therefore having a custom cylinder with 6m2 of...
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    Vaillant AeroTherm U.K. vs EU version?

    Hi Everyone, Does anyone know if there is a difference between the Vaillant AroTherm Plus 7k sold in the U.K. vs the EU model? I can see that there’s a huge price difference with items such as the VRC 720 F wireless controller and that generally speaking the AroTherm Plus is sold separately to...
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    Vaillant Arotherm 7KW Heat Pump Controllers???

    Hi All, I am considering installing a Vaillant Arotherm Plus 7kw heatpump in my house. Does anyone know if the Arotherm Plus 7Kw includes a controller unit (wiring center)? I previously lived in Denmark and Vaillant supplied a seperate VWZ AI Controller and this could be paired with a Vaillant...
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