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.
Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
Follow our sustainability journey at My Home Farm: https://myhomefarm.co.uk
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.
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. 😎
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
- 24 Forums
- 1,427 Topics
- 30 K Posts
- 19 Online
- 1,212 Members
Join Us!
Latest Posts
-
RE: Observations on my Ecodan's estimates of energy consumed and delivered
As it is possible for the FTC to be powered from a sepa...
By HarriUp , 2 hours ago
-
RE: ASHP Cut-off Temperatures: What's Your Setting and is a Your Heating Still On?
My system has been running 24/7 on weather compensation...
By HughF , 3 hours ago
-
RE: Noise problems with newly installed Samsung 8kW ASHP
Thanks @mars and @sjn I ran another check of 100 ba...
By Elton , 5 hours ago
-
RE: Heat Pump Truth or Myth#2 - Cycling uses a lot of power and ruins your COP
I cannot state that I have noticed that our A2A heat pu...
By Derek M , 6 hours ago
-
RE: Maximising Savings: Navigating My First Year with Octopus Energy and Heat Pump Running Costs
@toodles I can also happily report that the Agile tarif...
By Steve D , 8 hours ago
-
@editor As we all know, RHH always strive to educate, e...
By Toodles , 9 hours ago
-
@bontwoody I used the website link to contact them for ...
By Toodles , 11 hours ago
-
RE: Samsung ASHP power cycling
I have considered that and I would have expected to see...
By Blaine_t , 12 hours ago
-
RE: Is this a bad installation and is there something wrong with my Samsung heat pump?
@transparent that controller was moved from the loft an...
By David999 , 14 hours ago
-
RE: 14kW Midea ASHP in an old leaky building
Hi @batalto. I see you have a Midea ASHP and I am sched...
By Kbedders , 14 hours ago
-
RE: Additional ASHP kW for DHW cylinder?
We're in a similar boat to you with a hodgepodge of dif...
By Mars , 15 hours ago
-
Insulation of flow and return Heat Pump piping
I know mention has been made of ties on insulation runs...
By Toodles , 15 hours ago
-
RE: No-code, plug-and-play monitoring for your heat pump
Anyway, so far we have all missed the main protagonist ...
By Toodles , 16 hours ago
-
Rising Damp – Production Recommendation
We've noticed some rising damp around a window after th...
By Mars , 16 hours ago
-
RE: Bivalent (or even trivalent!) system design options for a new GSHP installation
Right, back to the topic at hand. To answer some of you...
By Algienon , 1 day ago
-
RE: Are Octopuses Slowing Consumer Adoption of Heat Pumps?
@ivanopinion Im in the same team as Ivan. I think for a...
By bontwoody , 1 day ago
-
RE: Issues with Vaillant connectivity via the MyCONNECT gateway
@drew-pa I don't know about hard work! It is pretty cl...
By dr_dongle , 3 days ago
-
RE: Are Solar Diverters Necessary for Homes with ASHPs and Solar PV?
@editor No, I made one 😀 Loft insulation all...
By Andris , 3 days ago
-
@hughf Thanks for that. Ah so they are talking about ...
By IRMartini , 3 days ago
-
RE: Ecodan software update. Real or scam?
@abernyte, hmm, must have been a major disruption if 40...
By Mars , 4 days ago
Latest Topics
-
By Toodles 10 hours ago
-
By Blaine_t 14 hours ago
-
Insulation of flow and return Heat Pump piping
By Toodles 15 hours ago
-
Rising Damp – Production Recommendation
By Mars 16 hours ago
-
Additional ASHP kW for DHW cylinder?
By Project_Electrify 1 day ago
-
By IRMartini 4 days ago
-
Riello / Midea - modbus set flow temp
By stuartornum 4 days ago
-
Ecodan software update. Real or scam?
By Morgan 5 days ago
-
Noise problems with newly installed Samsung 8kW ASHP
By Lokisam 6 days ago