Search results

@MNW67 You are right about the flow increased flow rate heating up the cylinder faster. The issue is that you don’t want to run flow rates too high as it can cause noise and erode on the pipe. If you use the Mass Flow Rate calculation for say a 7kw heat pump and a dT 5 C then flow is around...

@Notch7 You are soooo right about that... Funnily enough I would say that Denmark has it's fair share of plumbers that oversize ASHP systems as they can't be bothered to take the time to do proper heat loss calculations. While also zoning heating systems so that they don't function optimally...

@Notch7 With OpenEnergyMonitor.org you can actually go in and view the stats on a Cylinder. Adam from Heat Geek has shared all of his data online since June 2023 so yes I am very sure... Heat Geek Newark Cylinder Install Newark Heat Geek Cylinder statistics for 4 person family (6 months)...

I just wanted to share some very relevant information for others that may read this article and be interested in how they can optimism their DHW Cylinder for an Air Source Heat Pump. The following is an article based on the open energy monitor community that has a wide community of users who...

Okay... Perhaps you would like to explain how it does work if dT and Flow rates have nothing to do with energy consumption??? https://en.wikipedia.org/wiki/Mass_flow_rate#cite_note-7 Mass flow rate can be used to calculate the energy flow rate of a fluid: where is the unit mass energy of a...

@robinbanks Yes I do realise that! However having double the surface area will speed up the reheat time so I can run the heat pump at a lower temperature and get a faster heat up rate. Looking at Vaillant’s heat up time for a unistor 300 you are looking at 48min. at best. Presumably this is...

@muggles No that’s not what I am saying! What I am saying is that the Newark HG product appears to be very over priced based on the lack of data to backup the cost of the product. I can appreciate the initial cost is higher when designing a new cylinder but like any other product development...

Yes… The Heat Geek Cylinder does sound like a good solution but with a price tag of over £2500 plus £120 for delivery for a 280L unvented indirect cylinder it’s far, far too expensive compared to other DHW Heat Pump Cylinders that usually sell for half the price. This is especially true when...

@Notch7 Thanks for the response! Yes I need a 250-300L DHW Indirect Cylinder... and as it is for a Heat Pump I need to ensure that the coil is super efficient and as long as possible. I have a custom design with 6m2 of corrugated 28mm coil pipe

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...

Just thought I would answer my own question: I have spoken to Vaillant in the U.K., Belgium and Denmark and all AroTherm Plus Heat Pumps sold in the U.K. are identical technically to the EU version. The U.K. version however tends to be supplied with the VWZ AI Module Controller as standard which...

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...

Thanks for the reply! What I could understand is the AroTherm Plus 7kW needs an VWZ AI Controller which often comes with the heat pump in the UK and that can be connected to a VRC 720 F wireless stat which also includes an external thermostat for weather compensation. In which case the VR66/71...

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...