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.
Get a copy of 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
- 2,242 Topics
- 49.9 K Posts
- 366 Online
- 5,903 Members
Join Us!
Podcast Picks
Latest Posts
-
RE: My experience with 3 heat pump surveys: Heat Geek, British Gas & Octopus
Did they confirm it was being installed as an actual 4 ...
By Temperature_Gradient , 45 minutes ago
-
RE: Daikin Octopus installation update - I saw my first defrost. 😍😂
@radwhisperer Thanks but that is definitely not a mixer...
By Jancold , 50 minutes ago
-
-
RE: RDSAP10 effect on existing heat pump EPC rating?
As I understand the situation, Elmhurst Energy trains e...
By Transparent , 5 hours ago
-
RE: Octopus Cosy Heat Pump Owners & Discussion Thread
OK thats cheap, the commercial price seems to be £400 p...
By JamesPa , 6 hours ago
-
RE: Solar inverters - where does the energy go when clipping?
I think I must query the sources on which Greenmatch ha...
By Transparent , 9 hours ago
-
RE: Replacing knackered oil boiler with Samsung ASHP - Perthshire
This is how I run my Samsung 12kW ASHP with a 3rd party...
By Old_Scientist , 10 hours ago
-
RE: Testing new controls/monitoring for Midea Clone ASHP
@cathoderay thanks- yes will keep an eye out for the de...
By benson , 1 day ago
-
RE: Renewables & Heat Pumps in the News
Hoping so as well! I am no specialist. The language use...
By Batpred , 1 day ago
-
Do you need the DHW tank as high as 50°C @egp01 ? Ha...
By Transparent , 1 day ago
-
RE: The Hidden Secret to a Successful Heat Pump: Pipe Size Matters
@old_scientist Just to say that during our retrofit, we...
By Toodles , 1 day ago
-
RE: Daikin Altherma 3M ASHP and British Gas Hive Home
We have a Daikin EDLA08 8kW monobloc (DHW is handled se...
By Toodles , 1 day ago
-
@old_scientist @jamespa So this was last nights DHW r...
By bontwoody , 1 day ago
-
-
@springswood we install these nationwide and I have the...
By dgclimatecontrol , 1 day ago
-
RE: DESNZ doing a survey which asks the right questions!
Fair comment. I have a feeling that ratings more gen...
By JamesPa , 1 day ago
-
Thanks! My consumer unit collection is ready with the W...
By Batpred , 2 days ago
-
RE: Designing my house system with a mix of air to air and air to water
@jamespa Cheers James, it's great reading. In quite a f...
By pipebaron , 2 days ago
-
RE: PV Panels on roof in Conservation Area
If there is any way you can determine daily oil consump...
By JamesPa , 2 days ago
-
RE: Grant 13kW Aerona3 - issues getting zones to temp
attached is prelagged in case indicates anything. &nb...
By Crimson , 2 days ago



