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: Sep 6, 2026
@rupes Thanks for the info. I've seen a defrost temp of -3 and -4 trigger the cycle. It's definitely the 100W consumption figure which shows we're in ...
@rupes This is very interesting. I'm trying to wire up my LLH heater atm, but it's a tricky cabling path for both power, and the control switch from t...
Just to clarify @allyfish comments to avoid confusion (I hope) - they were talking about the need for an automatic setback function at nighttime which...
@rupes Here's my pattern for yesterday. Although I was in constant defrost cycles, I was hitting target quite often, but the house temp was a good 1C ...
@allyfish I think this slow handover between DHW and CH (and even this isn't the Grant way as per installation) is because LWT on the DHW cycle (say 6...
HW would be better run during the afternoon (say 3-4pm) rather than overnight, as it's when the LWT is highest so you want the warmest external air yo...
@allyfish Thanks for the info. For whatever reason, I didn't get the standard Grant HW cylinder with my install (it's a ukcylinders slim one) and they...
- that is the immersion heater element, so that's the right thing to do. There should now be nothing which is trying to add heat to the HW cylinder. ...
You've possibly had a pressure issue, which could be the hissing sound, or maybe there's been a slow leak on the secondary return valve that's now got...
For adjusting the overall system I'd leave everything open - you want to adjust things for when there's full demand on the system. Use TRVs to reduce ...
It depends a little on what the current OAT is. You're basically lowing the WC line to generate less heat, so you could lower either end, or both ends...
Hi, welcome to the forum! To answer your questions in order: "having WC on overrides the thermostat settings is this correct? I've changed the the...
SPONSORS
Degrees of Separation
Latest Posts
-
RE: How will removing the standing charge on gas bills benefit heat pumps?
I'm not sure it makes much of a difference to heat-pump...
By Temperature_Gradient , 6 hours ago
-
@editor Ouch, sorry to re start the tick. I had assume...
By DavidB , 7 hours ago
-
RE: Say hello and introduce yourself
@e-a-west as the good Major said, welcome to the forums...
By Mars , 8 hours ago
-
RE: New Build 3 Phase or 1Phase
We are on three phase power because it's an enormous li...
By EtchedPixels , 9 hours ago
-
RE: How much of your renewable and home setup would still work if the internet went down?
Yes I actually have a copy of a tool that whenever a ce...
By EtchedPixels , 18 hours ago
-
RE: Indevolt Batteries UK Support & Info Thread
@editor Hi, To resolve this, please tap on the A...
By Indevolt Tech , 1 day ago
-
RE: Double or Triple Glazed Windows?
Posted by: @singlespeed With 9 years repairing windo...
By Rob of York , 2 days ago
-
@transparent we’re still running a secure version of PH...
By Mars , 2 days ago
-
RE: How quickly would you want/expect heat recovery to take from setback?
Much longer than that here. The heating isn't even on. ...
By bobflux , 2 days ago
-
RE: Passiv Smart Thermostat - Help & Forum Support
Obviously the weather is changeable but there's a defin...
By Singlespeed , 3 days ago
-
RE: The Changing Jet Stream Could Challenge UK Air Source Heat Pumps
@rob-of-york I must admit that when we had a Daikin hea...
By Toodles , 3 days ago
-
RE: Forum updates, announcements & issues
Get the Renewable Heating Hub heads-up on WhatsApp. I...
By Mars , 3 days ago
-
RE: Safety study for plug in batteries out to tender - looks like Q3 2027 at best before legal
@editor I pointed out to the one of the Fuse execs that...
By dansus , 3 days ago
-
RE: 15kw pump for 225m2 1990's house - over kill?
@seaviews As well as loft insulation, there are othe...
By Rob of York , 3 days ago
SPONSORS
