Interesting user experience review of Vaillant ASHP
There are lots of other interesting posts on this science-based blog.
Not a hugely glowing user experience. Interesting blog.
Pre-order: The Ultimate Guide to Heat Pumps
Subscribe and follow our Homeowners’ Q&A heat pump podcast
That's been very similar to my experience, I came to the same conclusion about the rounding up / down within the SenseComfort app making the calculations meaningless. Like you when I did the sums I was seeing 2-2.5, when I check the Working Figure on the ASHP control interface it's about 3.6.Â
I would be interested to know what sort of MMSP you've got running? I'm keen to understand and optimise my system, but it's impossible without proper data.
Posted by: @editorNot a hugely glowing user experience. Interesting blog.
I think this confirms that unless you have a proper heat meter to measure energy delivered, working out COP is at best an estimate and at worst a finger in the air. It also reassures me that while Mitsubishi/Melcloud isn't perfect, it's not that bad either.
I'm afraid that you are all making the same mistake, you are measuring the same parameter more than once with different systems. If you only measure the parameter with one measuring system, then it must be completely accurate. 😎Â
I don't think that's the case Derek. The problem, as Cycleneil described, is the way the Vaillant app rounds numbers up/down gives wildly inaccurate results - bad data in = bad results out. Using different methods such as a proper MMSP (which is presumably more accurate) gives what appear to be more believable results.
I was being facetious as usual.
Being an Instrumentation and Control Systems Engineer for over 50 years, producing accurate indications has been my 'bread and butter' for much of that time.
I fully agree that the rounding of data within an App, and thereby providing incorrect data is far from ideal. Providing incorrect data is probably worse than providing no data at all.
I am used to working with systems where accuracy is a prime requirement, but even then there are limitations as to how accurate the system can perform, and at what cost.
As I stated previously, accuracy costs money. An MMSP system, if correctly installed, should give reasonably accurate results, but don't expect it to be completely accurate.
The point that I was making facetiously, is that if you only have one indication that appears reasonable, then one has to assume that it is reasonably accurate. The problem occurs when you have more than one system measuring the same parameter, and the results differ, then it is difficult to decide which if any are indeed accurate. This is a particularly problem where data is totaled over a period of time, when slight errors can become much more apparent.
Posted by: @squonkI don't think that's the case Derek. The problem, as Cycleneil described, is the way the Vaillant app rounds numbers up/down gives wildly inaccurate results - bad data in = bad results out. Using different methods such as a proper MMSP (which is presumably more accurate) gives what appear to be more believable results.
Not my blog - I just thought it was interesting and relevant to the discussions on here.
Posted by: @derek-mI was being facetious as usual.
Being an Instrumentation and Control Systems Engineer for over 50 years, producing accurate indications has been my 'bread and butter' for much of that time.
I fully agree that the rounding of data within an App, and thereby providing incorrect data is far from ideal. Providing incorrect data is probably worse than providing no data at all.
I am used to working with systems where accuracy is a prime requirement, but even then there are limitations as to how accurate the system can perform, and at what cost.
As I stated previously, accuracy costs money. An MMSP system, if correctly installed, should give reasonably accurate results, but don't expect it to be completely accurate.
The point that I was making facetiously, is that if you only have one indication that appears reasonable, then one has to assume that it is reasonably accurate. The problem occurs when you have more than one system measuring the same parameter, and the results differ, then it is difficult to decide which if any are indeed accurate. This is a particularly problem where data is totaled over a period of time, when slight errors can become much more apparent.
Ah, ok - I take your point! Sorry, been a long, mostly sleep-deprived week. Agree entirely
- 26 Forums
- 2,136 Topics
- 46.8 K Posts
- 15 Online
- 5,662 Members
Join Us!
Podcast Picks
Latest Posts
-
RE: Mitsu Wireless Controller and MelCloud
Update: I have found that the contractor had changed on...
By DavidAlgarve , 5 hours ago
-
RE: Air source heat pump roll call – what heat pump brand and model do you have?
@editor Hi Mars, We have just installed a Grant Aerona...
By GrahamF , 6 hours ago
-
RE: Sanity check please. Battery storage and inverter sizing.
There are MCS guidelines about how close to the edge/ri...
By Old_Scientist , 9 hours ago
-
RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff
I estimated our usage on the following basis. The mos...
By Old_Scientist , 10 hours ago
-
RE: Rodents! A word of warning for heat pump owners
ChatGPT comments: Yes – u...
By Tim441 , 12 hours ago
-
RE: Why so many sigenergi installer recommendations?
It’s a really simple answer, GivEnergy. Installers ...
By SAEnergy , 14 hours ago
-
@editor Something changed in this last 12 months, they ...
By ASHP-BOBBA , 1 day ago
-
RE: Ecodan & MelCloud scheduling
I put the above question to Mitsu UK at the sme time as...
By DavidAlgarve , 2 days ago
-
Thanks for the heat geek info. I've fitted my own heat ...
By bontwoody , 3 days 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 , 3 days ago
-
RE: Powerwall 3 or Myenergi or something else?
We have a Tesla Powerwall 3, recently installed, so I m...
By Old_Scientist , 4 days ago
-
RE: Mitsubishi PAR-WT60R-E Wireless Controller installation
@morgan They have been paired once but it was thought b...
By DavidAlgarve , 4 days ago
-
RE: Isolating the system for a planned power cut
A great many ground-mounted local substation transforme...
By Transparent , 4 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 , 5 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 , 6 days ago
-
RE: Anyone still weathering it out with Agile?
I went to Agile when I had solar installed July last ye...
By NJT , 6 days ago
-
RE: Say hello and introduce yourself
Whilst you're busy installing services (pipes and wires...
By Transparent , 1 week 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 , 1 week ago
-
@moman0311 welcome to the forums. I've received your em...
By Mars , 1 week 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