Last seen: Nov 22, 2025
Maybe you are right to be cynical and maybe not, I would really like to know as it would help understanding how best to operate (in particular) oversi...
@adamk Hi I see you posted on openenergymonitor, this in particular house is 1967 3 bed extended over the garage in 2005 to 4 bed then...
Often the default password is in the installation manual, which is on manualslib. Its unlikely to have been changed or personalised to the installer ...
Noted NR is definitely off. According to the Vaillant manual weather comp curve 0.5 is about 35C at 0C OAT Suggest you bump this up to say 0.8 whic...
Thats good at least. Is your soil locally damp or dry? Im presuming the floor is something like 100mm slab on hardcore on soil with a DPC somewhere....
fair enough! Better advice IMHO would be don't work on a house with uninsulated UFH, or if you do fit radiators instead! Well thats an admis...
Yes in general terms (obviously I cant tell if its exactly the right setting). Wait at least a day before changing it again, perhaps 2. This can tak...
OK. Please confirm heat curve and max flow temp settings last night. Are you 100% certain noise reduction mode is off. Something is capping flow tem...
No it isnt, because that's a political nightmare. The politically convenient decision which has (at least in part) caused the electricity/gas ratio...
Well that sounds like a win, hopefully. Nothing else to ask I dont think (other than the installer password if there is one - which is probably the d...
OK so feed to rads colder than feed to UFH and colder than flow temp from heat pump. Not good, losing efficiency and thus oomph to building. Taking ...
It does feel like you may have a genuine fault, unfortunately perhaps not bad enough to convince the manufacturer easily. Id be tempted to collect ...
Latest Posts
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RE: Boxt Heat Pump Installation Experience
By Andrew J H , 3 hours ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
@andrewj Certainly mine cycles alot below 36C, it seems...
By swwils , 4 hours ago
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RE: Commencing on an ASHP Installation Process
Prior to doing any further updates on this thread, it's...
By Sheriff Fatman , 4 hours ago
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@f1p hi I've ordered the dongle, it's been shipped ...
By @sand , 5 hours ago
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RE: Maintaining temperature on windy day
@jamespa — now that you have done some add on apology, ...
By cathodeRay , 7 hours ago
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RE: Don’t Install a Heat Pump Until You Read This
I feel for you. I have never done a major 'build' per...
By JamesPa , 8 hours ago
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RE: Extend the colder range of the weather compensation curve?
Not necessarily. Some heat pumps flatline at either en...
By JamesPa , 8 hours ago
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RE: Getting the best out of a heat pump - is Homely a possible answer?
OK - thanks @vanq What we're (jointly) about to say h...
By Transparent , 8 hours ago
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RE: Cashback Incentives That Reward Shorter Heat Pump Warranties
This is analogous to the PCP (personal contract purchas...
By Davesoa , 8 hours ago
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Threeway Diverter Valve question
I am looking at a few upgrades/fixes to my Grant Aerona...
By Grantmethestrength , 11 hours ago
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Thank you! I use plotly in python, with the data comi...
By cathodeRay , 13 hours ago
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RE: 10kw heat pump run in 24*7 data?
Vaillant are pretty good maintaining their ...
By JamesPa , 18 hours ago
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RE: Grant 13kW Aerona3 - issues getting zones to temp
So this morning marked 24 hours up for installer. Rooms...
By Crimson , 1 day ago
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RE: Buffer tank bypass on EDF Ideal heat pump installation
@kevb, many of these companies look for the smallest of...
By Mars , 1 day ago
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RE: Electricity price predictions
Simple article with a DENZ graph showing how gas which ...
By Jeff , 1 day ago
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RE: Heat Pump on Flat Roof Low Frequency Noise from Detached Neighbor
@davidnolan22 Yes have been communicating woth the neig...
By People_Noise , 1 day ago
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Power Cut - Heat Pump Evaporator Iced Up
We have just had a power cut and 1 hour later power was...
By trebor12345 , 1 day ago
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RE: Why Millions of UK Homes Struggle With Heat Pumps
A few weeks ago, I was having a discussion with someone...
By Majordennisbloodnok , 1 day ago
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RE: Help me keep the faith with my air source heat pump installation
@adamk Hi I see you posted on openenergymon...
By JamesPa , 1 day ago
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RE: British Gas vs Octopus Energy vs Heat Geek vs EDF vs Aira
@editor When do “Mars Heat Pump Installation and Servic...
By Toodles , 2 days ago
