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: Feb 9, 2025
@jamespa there is indeed a large noisy water pump placed after the buffer tank that circulates the water through the ufh and the fan coils. However fl...
@jamespa i will try to have a reading as near to the hp as possible. So its possible that hot water enters the tank and is mixed with colder water tha...
Another thing i noticed is the flow temp at the manifolds. While the heatpump shows a reading of lets say 35 out and 32 in, the temp reading at the ma...
@Jamespa There is a "minimum off" and "minimum on" setting. What do you think i should set the values at?
There is a "nightshift" mode with which you can set the hp to operate at reduced fixed capacity (lowest setting is 40%) for a period. If i set it to w...
@jamespa i'm using an app named hi-kumo, which has no monitoring tools, only basic settings. There is an updated controller, released recently by Hita...
@jamespa i was able to watch a 20 minute operation. In a 12c outside temp, the heat pump cycled off 2 times for 3 minutes at a time. When it cycled on...
@jamespa only able to measure delta t on primary circuit. If anyone with knowledge on hitachi heatpumps can suggest a way to see number of cycles, it ...
@judith i can't hear the heatpump but i can hear the external waterpump. Maybe i can try increasing the flow temp, reducing the flow rate manually thr...
House is a construction of 2020 with xps insulation and double glazed windows. No clue on sizing. It was decided by the engineers during construction ...
Hey JamesPa thanks for the reply. The reason for my post is my observation of the low dt and my concerns on the stress that the system undergoes. I ha...
SPONSORS
Degrees of Separation
Latest Posts
-
RE: Where heat loss surveys seem to go against practical reality
I am amazed that there is not something out there to me...
By JamesPa , 1 hour ago
-
RE: Next steps on my ASHP journey: Radiators and Pipework
@bobflux The hydraulic simulator is very interesting...
By Rob of York , 7 hours ago
-
RE: 7kW EV Charger Options Advice
Thanks. Yes, we have patchy 4G. The only option we had ...
By Rusty , 12 hours ago
-
-
RE: Being screwed over by Volkswagen Audi Group
Thanks, @batpred. That integration is the one I have in...
By Majordennisbloodnok , 1 day ago
-
RE: How Accurate Is My DIY Heat Loss Calculation?
@batpred I suspect it will be more this year. I had 9 ...
By AndrewJ , 1 day ago
-
RE: Surface mount or bury primaries for heat pump installation?
@jamespa It's rusting 🙂
By tomasmcguinness , 1 day ago
-
RE: Glass lined Cylinder for private water supply
Thank you, once again, for your replies. Yes...
By ian33a , 1 day ago
-
It’s been out a few days and Amazon has already attache...
By Mars , 1 day ago
-
RE: Missing flow temperature in Heat Geek proposal
Yes, and this is another point I agree. We did find a f...
By Batpred , 2 days ago
-
RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
A very good point. In effect, the DHW pipework is an em...
By cathodeRay , 2 days ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
@tim441 Here are those same three month periods for 202...
By Toodles , 4 days ago
-
RE: Adding additional Solar Panels to a DC coupled battery system
@transparent thank you for your reply above. As alway...
By Old_Scientist , 5 days ago
-
RE: Adventures in heat loss calculations
@rob-of-york — thanks for posting this, all very useful...
By cathodeRay , 6 days ago
SPONSORS
