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Setting different temperatures throughout the day. Good idea for ASHP?

 
Air Source Heat Pumps (ASHPs)
Last Post by Tufty 3 years ago
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 Tufty
(@tufty)
Trusted Member Member
Joined: 4 years ago
Posts: 54
Topic starter 23/11/2023 6:07 pm   [#1188]

Hi,

Ive got a Salus RT510 thermostat which controls the rads. Should I set a a standrad temperatures (19 degrees for example) across all 6 programmes? Or is it best to have different temperatures across different times of day?

Thanks



   
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MikeFl
 MikeFl
(@mikefl)
Estimable Member Member
Joined: 3 years ago
Posts: 132
24/11/2023 11:49 am  

The standard advice is to only vary settings by a maximum of 2C throughout the day e.g. 20C when you're at home, 18C overnight, and 19C during daytime but house is empty. HPs cannot raise house temperature at the same rate a gas boiler would.

Whether this is good advice is open to (much) debate. The answer will probably be "it depends".


Grant Aerona 3 10kW


   
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 iancalderbank
(@iancalderbank)
Prominent Member Contributor
Joined: 4 years ago
Posts: 643
24/11/2023 4:30 pm  

as a general rule, in a moderate to well insulated house, keep variation as little as possible.  But, other factors are always in play:

- do you want it warmer in the evening for lounging comfort? 

- have a time of use electricity tariff?

If the weather compensation of the heat pump is perfectly configured i.e. the variation of the flow temperature against outside temperature  exactly matches the heat loss of the house at all outside temperatures, then the indoor temperature will never vary. of course, no setup is perfect. some heat pumps have load compensation as well as weather, meaning they can boost  / adapt their output if an internal temperature rise is requested.


My octopus signup link https://share.octopus.energy/ebony-deer-230
210m2 house, Samsung 16kw Gen6 ASHP Self installed: Single circulation loop , PWM modulating pump.
My public ASHP stats: https://heatpumpmonitor.org/system/view?id=45
11.9kWp of PV
41kWh of Battery storage (3x Powerwall 2)
2x BEVs


   
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 Tufty
(@tufty)
Trusted Member Member
Joined: 4 years ago
Posts: 54
Topic starter 24/11/2023 5:16 pm  

Thanks guys. I will change my settings accordingly.



   
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