Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!
Last seen: Jun 26, 2026
@bretix we're all learning on these systems 🙂 I would set the secondary pump to full flow, always. If the pipe distance between your low loss header ...
@bretix the dial on the HW cylinder is just a cylinder stat, turn and set it to whatever hot water storage temperature you want, it will then revert t...
Oversize unit: it may cycle in and off more on low output, as the heating load might be below the minimum turn down capacity of the unit. That will co...
As Osiwu says, short circuiting of the evaporator airflow, where the discharge air ends up back at the coil inlet face, will reduce performance. But t...
Really sorry to read this @jswhite. 16kW is a large unit for 120m2 heated area, especially if you usually have diversity and only some rooms heated. Y...
The HIVE main thermostat overrides steady ASHP control if it's switching on and off. You can tell if it is from the HIVE app temperature graph. The HI...
Welcome! I have a similar sized house, EPC C, 1992, 4 bed detached. Formerly CH and HW from Kerosene, which was actually cheaper per kWh than mains ga...
Condensate drains could have been routed through the concrete pad to drain into the hardcore substrate underneath. A 50mm core cutter would have made ...
@editor I got the same, but for my mother's retirement flat, which is an account in my name. She only has electricity available to her. Her daytime ta...
The Grant/Chofu ASHP controller does not show if Weather Compensation is enabled or not from the 'home screen' display, you need to enter installer le...
I've tried running 24/7 with 18degC general space temperature. Lounge is boosted with a log burner the trickles heat upstairs too. It has been very co...
@bn06amp I'm afraid I can't spot it either there! It depends on where it is on the circuit, you don't need a bypass on the primary (ASHP) side with a ...
SPONSORS
Degrees of Separation
Latest Posts
-
RE: How Accurate Is My DIY Heat Loss Calculation?
@editor Thanks Mars, I have been enjoying playing with ...
By kilgorexv , 7 hours ago
-
New Vaillant Arotherm controls link to existing thermostats ; wired vs wireless
I am feeling baffled and worried:We are having a an Aro...
By GutoFfowc , 10 hours ago
-
RE: Do I add Air Con or MVHR to existing A2W ASHP?
@rob-of-york Thank you, I’m thinking along these same l...
By Toodles , 13 hours ago
-
@Mars Good questions! The downstairs unit did the maj...
By Rob of York , 13 hours ago
-
RE: Questions about A2A for heating as well as cooling
@donciccio I would suggest that you take a "fabric-fi...
By Rob of York , 13 hours ago
-
RE: Volumisers in Heat Pump Systems: Does Placement Matter?
@dave, I think @jamespa has probably identified the mos...
By Mars , 1 day ago
-
RE: Plug and play solar. Thoughts?
My thought is simple. Bring it on and bring on plug in...
By JamesPa , 2 days ago
-
RE: Heat Geek mini store vs pump size
Yes I agree, that’s why Heat Geek have most likely sele...
By Tomtheheatingengineer , 2 days ago
-
RE: Who's your electricity provider and what's your tariff?
@chandykris Swings and Roundabouts, you win some…. ...
By Toodles , 2 days ago
-
@tomtheheatingengineer, thank you, and welcome to the f...
By Mars , 3 days ago
-
RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
@majordennisbloodnok @tomtheheatingengineer For my ...
By JamesPa , 3 days ago
-
RE: Is the "divide by 2900" rule still valid?
Really flow rate is a pipework limitation not a water p...
By JamesPa , 3 days ago
-
RE: The good, the bad and the not that great – my heat pump installation
@burtis, I’ve followed this thread pretty much from the...
By Mars , 6 days ago
SPONSORS
