Post ASMeYWsXitCY3fdNTc by Stephencrown@mastodon.green
(DIR) More posts by Stephencrown@mastodon.green
(DIR) Post #ASLEvdwAqzGadzjXf6 by matthannon@mastodon.energy
2023-02-04T16:37:48Z
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Put my name forward for a Tado smart thermostat living lab trial with Energy Systems Catapult. Runs for a year and I get to keep the smart thermostat & radiator valves. Fingers crossed đ¤ https://www.tado.com/gb-en/wireless-smart-thermostat
(DIR) Post #ASLFGIwq5Pwjd0tf2u by AeonMach@mstdn.social
2023-02-04T16:41:31Z
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@matthannon Grand. Iâve been running a Tado system - smart wireless radiator TRVs - for a few years now.Itâs worked very smoothly. And allowed me to effectively zone a big old house very cheaply. I can run the heating without heating the whole house. Saving loads. Esp. WFH!
(DIR) Post #ASLOcnB5Gxy9LIMDui by Stephencrown@mastodon.green
2023-02-04T18:26:25Z
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@matthannon do bear in mind theyâre a bad idea (TRVs in general with the exception of bedrooms) with an Air to Water #A2W based (i.e. radiator/UFH based) #HeatPump so shouldnât be used, nor pushed. An open circuit that doesnât restrict flow is very very important to get the efficiency levels theyâre rated & good for.Take a look at #HeatGeek (Adam Chapman) @petereastern , @kenbone , @stevewebster56 , Nathan Van Gambling for references to this
(DIR) Post #ASLPCFGOqIEaaHkVMG by Stephencrown@mastodon.green
2023-02-04T18:30:18Z
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@matthannon @petereastern @kenbone @stevewebster56 I had the Honeywell EvoHome smart radiator setup on all radiators prior to this summer when I got my Daikin #HeatPump installed by Octopus đ Energy. They also agree with the no TRV (or set all to max) approach & instead balance the radiators and UFH. All controls (incl. smart TRVs) are now gone, with the system running brilliantly efficiently on pure weather compensation control only.
(DIR) Post #ASLPCFo4p5AmGjVOqm by matthannon@mastodon.energy
2023-02-04T18:32:51Z
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@Stephencrown @petereastern @kenbone @stevewebster56 so TRVs ok until I go heat pump or bad even with gas boiler?
(DIR) Post #ASLQ0qf04mrZ30NwjA by Stephencrown@mastodon.green
2023-02-04T18:41:58Z
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@matthannon @petereastern @kenbone @stevewebster56 I wouldnât personally. The technical âwhyâ is that you need a minimum amount of water & emitters (radiators, UFH) in the system (ie the TRV hasnât turned off!) that matches the minimum modulation heat output (Watts) of the heat source (gas or #HeatPump )Not doing this leads 2 âshort cyclingâ where the unit hasnât got anywhere to send the heat so turns off, yet thermostat says it needs heatâŚ.
(DIR) Post #ASLRoes8HKEyv7qJbE by Stephencrown@mastodon.green
2023-02-04T19:02:10Z
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@matthannon @petereastern @kenbone @stevewebster56 have you considered doing an episode for #LocalZeroPod to aid people with best practices for #HeatPump ?I see youâve had Nathan van Gambling and Adam Chapman on before, but would be worth having even a segment on this.Remember: #HeatPump efficiency (from being able to lower flow temperature from say installing more or bigger radiators) is equivalent of other energy saving measures. Subtle.
(DIR) Post #ASLTzldve1LV0uckym by Stephencrown@mastodon.green
2023-02-04T19:26:36Z
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@matthannon @petereastern @kenbone @stevewebster56 The other thing worth mentioning is that the tado (or other makes) control wonât be able to effectively or efficiently control a #HeatPump itself. They send on/off signals to the heat pump which are terrible for efficiency (but will work with higher running costs)Best to remove/not install 3rd party control/thermostats with #HeatPumpStick to the supplied manufacturer controls basically!
(DIR) Post #ASLUMUk0eSPfFnJ0Zk by kenbone@c.im
2023-02-04T19:30:41Z
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@matthannon @Stephencrown @petereastern @stevewebster56 We install TRVs, but we also make our systems open loop. So the main reason for TRVs is for overshooting, the main heat sources ie, the big areas on the ground floor, we won't use the heads at all.
(DIR) Post #ASLXec0Ch1kKqhD8Gu by zapaman@mastodon.social
2023-02-04T20:07:35Z
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@matthannon @Stephencrown @petereastern @kenbone @stevewebster56 I'd say smart TRVs are ok with a gas boiler running at at or above 45C. But below this they won't have anything to add in downstairs rooms. Below ~40C and they detract generally.
(DIR) Post #ASLl0brhBNtSCM3DEW by matthannon@mastodon.energy
2023-02-04T22:37:16Z
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@Stephencrown @petereastern @kenbone @stevewebster56 yes I agree we ought to have a best practice and trouble shooting episode shortly. Give the people what they want!!
(DIR) Post #ASMeYWsXitCY3fdNTc by Stephencrown@mastodon.green
2023-02-05T08:59:33Z
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@matthannon @petereastern @kenbone @stevewebster56 I found one of the really good field trial (Ireland, so very close match to our climate) reports that @paulkenny was involved in and I read a few times to digest. https://www.researchgate.net/profile/Seamus-Hoyne/publication/340849413_Superhomes_20_Best_Practice_Guide_for_ASHP_Retrofit/links/5ea09ecf299bf143893ff09b/Superhomes-20-Best-Practice-Guide-for-ASHP-Retrofit.pdf?origin=publication_detailWorth a look, and again this also covers TRVs amongst other great best practice and conclusions. Hope the share is useful to others.