Ideal Logic ASHP - change from 55°C to 35°C Heating?
Ok on second thoughts scrub the questions. Id be tempted to optimise the rads as previously described. If you find that this results in a rad curve lower than 0.8 (IE the rads can run at a lower temp than the ufh), assess what to do with the ufh. If there is scope to run it at lower ft do so otherwise this will be the limiting factor. It would be quite unusual however for rads to be sized so they need a lower ft than ufh.
4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.
Agree - I will finish optimising the rads before I think about the UFH
UFH temperature is adjusted with the mixing valve located on the manifold. It's currently set at 50°C which is the max setting but can be dialled down if needed. The speed of the pump can also be tweaked to increase or decrease the flow rate. The flow meters can also be adjusted for each loop if needed but fully open up when the UFH is on.
I've now opened the rad TRV's to max and will monitor the heating performance over the coming days.
UFH should never be at 50C since small feet can get burned. I think the regs say 39(?). But your floor covering could be damaged too unless it’s tile or concrete. Nobody want pipe shaped marks on their wood or blown adhesive on LVT.
2kW + Growatt & 4kW +Sunnyboy PV on south-facing roof Solar thermal. 9.5kWh Givenergy battery with AC3. MVHR. Vaillant 7kW ASHP (very pleased with it) open system operating on WC
Good point. I’ll keep my eye on the manifold temperature gauge which is currently showing 30C with the room temperature currently at 19C. After changing the heat curve yesterday from 1.5 to 1.3 the heating flow temperature has reduced from 50C to 45C. I’m not sure the UFH would ever reach the same temperature as the flow but best to keep my eye on it to prevent the issues you have mentioned. Thanks for your help. It’s great to learn from others, especially through forums like this one
- 26 Forums
- 2,153 Topics
- 47.3 K Posts
- 43 Online
- 5,673 Members
Podcast Picks
Latest Posts
-
RE: Can you help with our research: solar panels, EV chargers, home batteries, heat pumps?
Nice one @toodles... always appreciate your enthusiasm ...
By Mars , 12 hours ago
-
@profzarkov Good to know in case it ever happens to me...
By bontwoody , 16 hours ago
-
RE: New Vaillant aroTherm Plus in black - When will it come to the UK?
@patrickvito We have had car dealers re-powder coat the...
By ASHP-BOBBA , 17 hours ago
-
RE: Are Octopuses Slowing Consumer Adoption of Heat Pumps?
I mean, is this surprising? The local installers in my ...
By Alex , 17 hours ago
-
@old_scientist sorry, I should have made it clear that ...
By GrahamF , 17 hours ago
-
RE: Mitsubishi Ecodan 11kw Defrosting Issue.
@thundermink can you provide photos to illustrate your ...
By Morgan , 17 hours ago
-
RE: Boiling Mad: Exposing Radiatorgate
Hi @Rob, I’d be more than happy to contribute. I have ...
By DREI , 20 hours ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
@andris a great year - very happy with our system
By Profzarkov , 22 hours ago
-
RE: A Customer's Lessons Learnt from a Heat Pump Installation in a Large House
After our rather lengthy meander off piste, I thought I...
By GrahamF , 23 hours ago
-
RE: Midea ASHP – how to set weather compensation
@pash44pump - to collect the IAT/OAT data, can I sugges...
By cathodeRay , 1 day ago
-
RE: Ecodan software update. Real or scam?
@vinz86 Contact Mitsubishi and an engineer attends and ...
By ASHP-BOBBA , 1 day ago
-
@drei When I was in local government we were of cours...
By JamesPa , 2 days ago
-
RE: Heat Pump SCOPs – The Truth Might Not Be What You Think
Sufficient system volume is also essential for ensuring...
By Old_Scientist , 2 days ago
-
RE: Flexi-Orb Heat Pump Scheme: A Game-Changer for the UK's Heat Pump Industry
As someone who has suffered from a Heat Pump installati...
By DREI , 2 days ago
-
RE: What crazy nonsense are inverter limits and why are they imposed?
I’ve also got a dual fuel Rangemaster. We originally ha...
By Majordennisbloodnok , 3 days ago
-
RE: Octopus tariffs - a quick comparison
@tim441 I’d agree wholeheartedly with that, with 2 x Po...
By Toodles , 3 days ago
-
RE: Electricity price predictions
@bontwoody Maybe one for @editor to consider whether a ...
By ChandyKris , 3 days ago
-
RE: is a home battery without an EV worth it?
You would think, but when I had my Powerwall 3 installe...
By Old_Scientist , 3 days ago