Temperature schedule for ASHP
Hi all, i am new here.
I have a question about temperature schedules.
We have just had our Octopus survey, waiting for quote for a Daikin system.
We currently do not heat the upstairs, hall set to 18 and rooms in use set to 20 or 21.
During the night we turn all stats down to 13. Using Hive system.
The surveyer said we only get a basic Daikin thermostat an leave it constant day and night.
Surely this is wrong.
If we move to new cosy octopus rates I would plan on boosting through the cheap periond and minimising electricity during day rate and peak rate.
We do have PV and battery but that is smal fry compared to winter heating.
So, do ASHP owners vary temperature to save energy and cost or is it normal to keep it constant?
John
I keep it constant, I don't even have a room thermostat. It runs on weather compensation 24/7. I'm still tweaking the weather comp settings to get things just right.
Cosy is a terrible tarriff.... you'd be much better off on Go.. Heat pumps like to run long and low, boosting the heat for a couple of hours and then coasting through the expensive couple of hours isn't a good strategy in my opinion.
Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.
My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.
Your house loses heat 24hrs a day – if you heat the house for only some of those hours then you have to replace the lost heat as well, which if you have a gas boiler just amounts to using the gas at a different time, though there is a modest benefit from a lower rate of heat loss the longer you aren’t heating – so this is what most people expect to do with heating.
Because a heat pump is less efficient if it has to work harder to get the circulating water hotter, the calculations say that more energy is used to reheat up to a temperature after a period of inactivity than to maintain a running temperature.
However, many users do run a setback at night and think it doesn’t alter the efficiency too much, as temps are lower at night which decreases efficiency too. But I think there is a limit to how long you can not heat for before you struggle to bring the house back up to temp – the difficulty is that will vary depending on the weather which makes it hard to schedule.
Lowering the cost of energy is a different calculation to getting the most efficient performance from the pump by lowering the quantity of energy required. It is easier to benefit from time-of-use tariffs with UFH as that can be loaded up – if you only have radiators then you are relying on the thermal efficiency of the house to carry heat between ‘on’ periods.
Mitsubishi EcoDan 8.5 kW ASHP - radiators on a single loop
210l Mitsubishi solar tank
Solar thermal
3.94kW of PV
- 26 Forums
- 2,136 Topics
- 46.8 K Posts
- 25 Online
- 5,662 Members
Join Us!
Podcast Picks
Latest Posts
-
RE: Ecodan & MelCloud scheduling
I put the above question to Mitsu UK at the sme time as...
By DavidAlgarve , 7 hours ago
-
@ashp-bobba interesting insights. We also chatted after...
By Mars , 7 hours ago
-
RE: Why so many sigenergi installer recommendations?
I’ve not come across this brand, but then again I don’t...
By Mars , 7 hours ago
-
Sanity check please. Battery storage and inverter sizing.
I had one installer essentially wanting to install a ti...
By AdamK , 17 hours ago
-
RE: Rodents! A word of warning for heat pump owners
The gaps and holes have reduced on heat pumps over the ...
By dgclimatecontrol , 23 hours ago
-
RE: Air source heat pump roll call – what heat pump brand and model do you have?
Forum Handle: EGP01 Manufacturer: Samsung Model: 8K...
By EGP01 , 1 day ago
-
Thanks for the heat geek info. I've fitted my own heat ...
By bontwoody , 1 day 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 , 1 day ago
-
RE: Powerwall 3 or Myenergi or something else?
We have a Tesla Powerwall 3, recently installed, so I m...
By Old_Scientist , 2 days ago
-
RE: Mitsubishi PAR-WT60R-E Wireless Controller installation
@morgan They have been paired once but it was thought b...
By DavidAlgarve , 3 days ago
-
RE: Isolating the system for a planned power cut
A great many ground-mounted local substation transforme...
By Transparent , 3 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 , 4 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 , 4 days ago
-
RE: Anyone still weathering it out with Agile?
I went to Agile when I had solar installed July last ye...
By NJT , 5 days ago
-
RE: Mitsu Wireless Controller and MelCloud
Well it has now become obvious that the installation of...
By DavidAlgarve , 5 days ago
-
RE: Say hello and introduce yourself
Whilst you're busy installing services (pipes and wires...
By Transparent , 6 days 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
-
RE: ASHP heat output monitoring
@carlo I see there is a discussion in Facebook user gro...
By Tim441 , 1 week ago