It's great that Aira continue to add features to the app. Our 8kW efficiency figures are:
Month | Electric Consumption | Heat Delivered | COP |
October 24 | 403 | 1512 | 3.75 |
November 24 | 654 | 2409 | 3.68 |
December 24 | 713 | 2875 | 4.03 |
Has anyone got any information on how/why they justify a buffer tank in their install? Everyone seems really happy with the install and running so I assume the buffer isn't an issue but given the general feeling that buffer tanks shouldn't be used by default this is the one piece of their installation that I find a bit strange.
@andrewj Our installers fitted am LLH; their justification for fitting this efficiency reduction is that ‘It ensures that the heat pump sees a constant load and the actual secondary circuit flow rate is less critical making it much easier to achieve a constant Delta T.’ Not sure that this is the full story but suspect that, as mentioned on this hub numerous times, it reduces the chance of engineer call-outs. 😒 Regards, Toodles.
Toodles, he heats his home with cold draughts and cooks his food with magnets.
@toodles So that would imply what I thought (perhaps I'm too cynical): it is put in to separate problem responsibility between the heat pump and the secondary circuit. Although in the case of Aira, who install both sides and presumably are responsible for warranting both, I don't think that counts for much (as opposed to, say, a Vaillant heat pump and a local installer.) Is it much of an efficiency hit or do they have it technically sussed?
@andrewj In my case, I would put any shortcomings down to the installers but fortunately for us, our system is working very well. I took the measure of optimising the things that the installers run out of time to do😉 for myself. I let them roughtly balance the radiators during a very warm end of day in February (before they all went off home or to the pub or whatever) as I knew there was no way the system would be optimised that afternoon!
I also played with the LWT and at that time, I had to let the MMI controller do what it could to run well. I gradually improved the settings for the WC and then come the following autumn, I had Homely smart control added.
In between times, I bought 4 of the temperature probes and ‘calibrated’ them, (I bundled all the probes together, let them stabilise overnight and noted the disparity in the 4 sets of readings). I taped the probes on all four pipes entering and leaving the LLH and covered each with a few layers of insulating aluminium coated sheet. I then gradually adjusted the secondary pump speed to achieve minimum disparity between the flow in and flow out to the pump - and likewise between the return flow and the LLH return to the heat pump circuit. Regards, Toodles.
Toodles, he heats his home with cold draughts and cooks his food with magnets.
@andrewj Well, not everyone. My experience would probably be the one anti heat pump brigade would be keen to highlight. The product is great, the installer who came is really good. But, I don't think Aira have their operations under control.
It's day 9 and my installation is still ongoing. Not because it's a complex installation, but rather because they decided to again send only one engineer on-site this week. With a three storey house and 15 radiators, the one engineer on-site can only run around so much to check for leaks. There was a massive leak in my study and just missed the electrical sockets by sheer luck. It could have been a total disaster. I am having to help the installer with lifting and positioning a large radiator as there's no way he would be able to lift a 70 kg radiator and install by himself. And to top it all, they sent me an invoice to pay for a system that's not even commissioned!
16 * 435 watts PV
13 kWh Growatt battery
1 EV - Mercedes EQB
6 kW Aira Heat Pump
Day nine gone, the heat pump is still not commissioned. There's a sensor problem and there's no electrician onsite to help the lead engineer. Now, they won't come back until Thursday and won't be commissioned until day 11.
Not sure what options are there to explore, complain to MCS, trading standards, Ofgem. Personally, I shouldn't have fallen for the 15 year warranty and should have gone with Octopus or Heat Geek. If their service is as bad as the installation experience, the warranty is not worth the hassle.
16 * 435 watts PV
13 kWh Growatt battery
1 EV - Mercedes EQB
6 kW Aira Heat Pump
@chandykris Sounds like a pretty poor state of affairs. Hopefully once it is in and commissioned it will work fine and this will drift into a bad memory lost in the mists of time. I now have to decide between Octopus or Heat Geek for an install - I think I'll leave Aira and not complicate it further. I don't have all the details yet but I think the juggle will be between cost, confidence and heat pump model!
Thanks @andrewj. Hope my bad experience didn't put you off. Others in the forum have had good experiences, so maybe mine is just an odd one out.
I should have done what Toodles and others had suggested. Lower the flow temperature post installation. Let Octopus design the system at 50 degrees flow temperature, but upgrade the radiators myself at an extra cost and then lower the flow temperature. Well, hindsight is a wonderful thing!
16 * 435 watts PV
13 kWh Growatt battery
1 EV - Mercedes EQB
6 kW Aira Heat Pump
@chandykris sorry to hear this, I hope that progress picks up and Aira will sort your system.
Aira managed to send an engineer at 5:30 pm today and it took a while, but thank Higgs Boson, we have heat! It was up and stunning around 8:30 pm starting with hot water. Then heating kicked off and the house is slowly heating up. Really surprised how quiet the unit is, I can hardly hear it working from the sun room just 1.5m away.
Still loads to do, lagging everything, sorting out some joints, cleaning up everywhere, close the boiler flue hole. But, at least the heat pump is commissioned. Like Andrew said, maybe this will just be a bad memory in the mist of time.
16 * 435 watts PV
13 kWh Growatt battery
1 EV - Mercedes EQB
6 kW Aira Heat Pump
Currently viewing this topic 1 guest.
- 26 Forums
- 2,136 Topics
- 46.8 K Posts
- 29 Online
- 5,662 Members
Join Us!
Podcast Picks
Latest Posts
-
RE: Rodents! A word of warning for heat pump owners
The gaps and holes have reduced on heat pumps over the ...
By dgclimatecontrol , 43 minutes ago
-
RE: Ecodan & MelCloud scheduling
I couldn't agree more. I might go so far as to change t...
By Majordennisbloodnok , 49 minutes ago
-
RE: Air source heat pump roll call – what heat pump brand and model do you have?
Forum Handle: EGP01 Manufacturer: Samsung Model: 8K...
By EGP01 , 4 hours ago
-
Thanks for the heat geek info. I've fitted my own heat ...
By bontwoody , 5 hours ago
-
RE: Does anyone have experience of a smart water meter?
Just to give a sense of scale, I've used the CCW water ...
By Majordennisbloodnok , 6 hours ago
-
-
RE: Powerwall 3 or Myenergi or something else?
We have a Tesla Powerwall 3, recently installed, so I m...
By Old_Scientist , 1 day ago
-
RE: Mitsubishi PAR-WT60R-E Wireless Controller installation
@morgan They have been paired once but it was thought b...
By DavidAlgarve , 2 days ago
-
RE: Isolating the system for a planned power cut
A great many ground-mounted local substation transforme...
By Transparent , 2 days ago
-
RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?
Having bit the bullet and paid £250 for a service, our ...
By Old_Scientist , 3 days ago
-
New heat pump heating system underperforming in Italy... Advice needed!
hi all, first post! I've just renovated a house in sout...
By robinlawrie , 3 days ago
-
RE: Anyone still weathering it out with Agile?
I went to Agile when I had solar installed July last ye...
By NJT , 4 days ago
-
RE: Mitsu Wireless Controller and MelCloud
Well it has now become obvious that the installation of...
By DavidAlgarve , 4 days ago
-
RE: Say hello and introduce yourself
Whilst you're busy installing services (pipes and wires...
By Transparent , 5 days ago
-
RE: New Vaillant aroTherm Plus in black - When will it come to the UK?
@editor I know it was formally announced at Ish the oth...
By PatrickVito , 6 days ago
-
@moman0311 welcome to the forums. I've received your em...
By Mars , 6 days ago
-
RE: Thermostat for Ideal Logic Air with 3 zone support
No harm at all in plumbing it as 3 zones, I would have ...
By JamesPa , 1 week ago
-
RE: ASHP heat output monitoring
@carlo I see there is a discussion in Facebook user gro...
By Tim441 , 1 week ago
-
RE: Flexi-Orb Heat Pump Scheme: A Game-Changer for the UK's Heat Pump Industry
MCS have set a potential trap in the new version of MCS...
By JamesPa , 1 week ago
-
RE: Who has a V2G EV installation
General comment on battery care... I guess if ev is on ...
By Tim441 , 1 week ago