You were one of many people who, in recent weeks, has requested a copy of the HG Series specification – a range of super-efficient, Heat Pump-ready Hot Water Cylinders, which have been designed by Heat Geek and which are manufactured exclusively by us at Newark Cylinders. Until now, this range has …

Intrigued to see who gets the first one of these installed on a openenergymon system and up on heatpumpmonitor.org :laughing:

But before anyone goes diving in head first looking for a solution to their DHW woes, pause for a moment. As i’ve found with my Mixergy cylinder. It’s rarely the cylinder that is at fault (as long as it is a proper heat pump cylinder with suitable coil). It’s how you use the heat pump to heat the…

I don’t have a proper ASHP cyclinder, but I only run the ASHP to a set point of 43C because it will quite comfortably deliver that. In practice, 43C actually delivers 50C DHW at the top of the coil. If needed I top up with the immersion. Over the last month, my ASHP has delivered DHW with a CoP o…

Almost. Opted for a Newark with 4m2 coil and 75mm insulation instead. I am curious to compare the potential benefit of the larger coil (less kWh to re-heat) versus lower standing heat loss from a cylinder with thicker insulation.

Somewhat gutted as this looks a great product. Wether it is worth the five hundred over the joule one is another matter, though. We have just installed a 300l Joule cylinder. It works well enough. I did briefly consider the A+ rated OSO one, but could not get the energy savings to offset the addit…

[image] Zarch: Intrigued to see who gets the first one of these installed on a openenergymon system and up on heatpumpmonitor.org Adam’s got one! Or at least very similar, it’s impressive that over the past month including the cold snap he’s got a higher COP for DHW than he has for space hea…

Does the very large coil makes a difference with Eco mode on Vaillant models, eg is it only important for heatpump that insist on using max output when in DHW mode? The low insulation levels concern me as I assume I would only heat dwh on cheap rate so need to store a lot of heat.

The same way that oversizing radiators allows the system to run more efficiently and push out more heat at lower volumes the bigger coil should have a similar effect (and can be seen on the system marked Mytchett, Surrey). As these are custom built cylinders I expect there is not a lot stopping you…

Assuming 7.5p kwh overnight and 30p kwh daytime, then any COP over 1 at night is better then COP of 4 in daytime! (But grant requires heatpump to be connected to DHW tank.) Heat loses from heating water in pipes between heatpump/tank in summer makes the true COP significant lower then the COP as m…

Those of us with proper metering do not take measurements at the heat pump, we take them where the tank and heating connections are, so the COP is true in the sense that it is the heat delivered to the tank and heating system. .

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Heat Geek Series - Heat Pump Cylinders by Newark

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