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 a copy of the 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
- 2,204 Topics
- 48.6 K Posts
- 16 Online
- 5,859 Members
Join Us!
Podcast Picks
Latest Posts
-
@editor He couldn't give me a definitive date but hoped...
By bontwoody , 27 minutes ago
-
RE: Help me keep the faith with my air source heat pump installation
@jamespa this is what the pipe work looks like after th...
By AdamK , 3 hours ago
-
RE: Testing new controls/monitoring for Midea Clone ASHP
Don't disagree with that. I find the lines on the plotl...
By benson , 8 hours ago
-
RE: Sizing a heat pump: Save me from my headache
Got the results back from the one we’re ...
By Mikeatthezoo , 9 hours ago
-
I'm minded to copy the above post from @jamespa direct...
By Transparent , 9 hours ago
-
Very funny @transparent. /p>
By JamesPa , 22 hours ago
-
RE: How can I programme a setback for my Samsung Gen6 8kW heat pump?
@mike-h what I don't understand about this setback cont...
By richdorm , 1 day ago
-
RE: Renewables & Heat Pumps in the News
Thanks Lucia. I'll set aside some time to go through th...
By Transparent , 2 days ago
-
RE: How to Understand Wiring Up a Heat Pump
@renewables345 you say you are 18 and I’m assuming you ...
By Judith , 2 days ago
-
RE: Do I just go with the lowest quote for my heat pump?
Seems to be settling better now I'll leave it alone
By Jancold , 2 days ago
-
RE: Bosch CS5800i 5kW - Experience So Far
We do like the exhaust air heat pump as a centralised M...
By Steelbadger , 2 days ago
-
RE: Solar Thermal DHW and ASHP
@kenbone how is your battery holding up Ken? Still goin...
By Mars , 2 days ago
-
RE: Air source heat pump roll call – what heat pump brand and model do you have?
Old Samsung R410a unit 9kw, modbused controlled, let Ha...
By KenBone , 2 days ago
-
RE: Replacement Inverter for old FIT system
@bontwoody I have a single string 3kW solar AC inverter...
By Old_Scientist , 2 days ago
-
Octopus removed our gas meter for free a couple of year...
By robl , 3 days ago
-