Forums

Forums
Renewable Heating
Air Source Heat Pum...
Replacing Worcester...
 
Notifications
Clear all

Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!

Replacing Worcester oil boiler with an ASHP

 
Page 16 / 16
Air Source Heat Pumps (ASHPs)
Last Post by JulianC 7 months ago
190 Posts
27 Users
182 Reactions
53.4 K Views
RSS
JulianC
 JulianC
(@julianc)
Honorable Member Member
Joined: 5 years ago
Posts: 336
Topic starter 27/01/2025 10:48 am  

@judith we probably could have got away with an 8kW ASHP. I have not formally checked. 
But given the modern variable scroll compressors, I’m not there would be any savings?  Havenwise seems to run the hp for longer at a lower temperature. Thus less compressor starts which is good for longevity. 
Similar sized property. 
When you do go EV, make sure the charger you choose can be controlled by Octopus so you can benefit from Intelligent Go e.g. Zappi mk2. Many others. 
Im enjoying the electric journey.


Daikin Altherma 3H HT 12kWh ASHP with Mixergy h/w cylinder; 4kW solar PV with Solic 200 electric diverter; Honda e and Volvo EX30 Ultra Twin Performance electric vehicles with Myenergi Zappi mk1 & Ohme chargers


   
ReplyQuote
Majordennisbloodnok
 Majordennisbloodnok
(@majordennisbloodnok)
Famed Member Moderator
Joined: 4 years ago
Posts: 1729
27/01/2025 3:19 pm  

Posted by: @julianc
↑

...

When you do go EV, make sure the charger you choose can be controlled by Octopus so you can benefit from Intelligent Go e.g. Zappi mk2. Many others.

...

I agree with getting a charger that can be controlled by Octopus (since if you want to go down that route then your installation will already allow it) but I'm not entirely convinced that one's charger should be controlled by Octopus. However, that's a very subjective debate going on elsewhere with no obvious right or wrong answer so far.

 


105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"


   
ReplyQuote
JulianC
 JulianC
(@julianc)
Honorable Member Member
Joined: 5 years ago
Posts: 336
Topic starter 27/01/2025 3:27 pm  

@majordennisbloodnok I’m completely happy with Smart Meter & giving Octopus remote control of my EV charger. I can take back manual control if required. 
The dynamic management of the grid will deliver massive benefits.


Daikin Altherma 3H HT 12kWh ASHP with Mixergy h/w cylinder; 4kW solar PV with Solic 200 electric diverter; Honda e and Volvo EX30 Ultra Twin Performance electric vehicles with Myenergi Zappi mk1 & Ohme chargers


   
👍
1
ReplyQuote



Majordennisbloodnok
 Majordennisbloodnok
(@majordennisbloodnok)
Famed Member Moderator
Joined: 4 years ago
Posts: 1729
27/01/2025 3:52 pm  

Posted by: @julianc
↑

@majordennisbloodnok I’m completely happy with Smart Meter & giving Octopus remote control of my EV charger. I can take back manual control if required. 
The dynamic management of the grid will deliver massive benefits.

And that makes it the right setup for you. It just also happens to be entirely the wrong setup for me.

The important part of your penultimate post, though, is that if you get an Octopus-compatible charger then you're free to exercise that choice whichever way you decide.

 


105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"


   
👍
1
ReplyQuote
JulianC
 JulianC
(@julianc)
Honorable Member Member
Joined: 5 years ago
Posts: 336
Topic starter 13/04/2025 6:27 pm  

The annual update. 
so the April 24 to 25 numbers:  we used 4316 kWh. 
SCOP was 3.91

SCOP since starting 3.83. 

So this is ok, but was hoping for better with Havenwise. But switched off since 10th Feb (2months). As they were trialling with Daikin directly. Hopefully they will switch me back in for autumn / winter 2025. 
Otherwise running costs are well below the target. And much better than the oil boiler. 
Will be switching off over summer as the solar PV heats the water. 


Daikin Altherma 3H HT 12kWh ASHP with Mixergy h/w cylinder; 4kW solar PV with Solic 200 electric diverter; Honda e and Volvo EX30 Ultra Twin Performance electric vehicles with Myenergi Zappi mk1 & Ohme chargers


   
ReplyQuote
 Cliff-Arnold
(@cliff-arnold)
New Member Member
Joined: 1 year ago
Posts: 2
13/04/2025 6:37 pm  

Is this something you are thinking of doing? Or has this already happened?



   
ReplyQuote



JulianC
 JulianC
(@julianc)
Honorable Member Member
Joined: 5 years ago
Posts: 336
Topic starter 11/09/2025 5:32 pm  

@cliff-arnold sorry. Only just seen this. I was trialing HavenWise. They need to wider test Daikin, so I was disconnected. But that’s fine as I don’t use the HP in the summer. I will reconnect shortly 


Daikin Altherma 3H HT 12kWh ASHP with Mixergy h/w cylinder; 4kW solar PV with Solic 200 electric diverter; Honda e and Volvo EX30 Ultra Twin Performance electric vehicles with Myenergi Zappi mk1 & Ohme chargers


   
ReplyQuote
JulianC
 JulianC
(@julianc)
Honorable Member Member
Joined: 5 years ago
Posts: 336
Topic starter 11/09/2025 5:36 pm  

Daikin Software Update. 

I received a software update for my Daikin ASHP today. Version 5.3 to 5.4

I received a call from the engineer yesterday and he was out today. A firmware update on the hydrobox and the flashed the memory on the outdoor unit. Took 1/2hr. 

Anyone else received this or heard about it?

It’s supposed to improve efficiency in autumn and spring due to quicker restarts between the compressor and the flow switch. 


Daikin Altherma 3H HT 12kWh ASHP with Mixergy h/w cylinder; 4kW solar PV with Solic 200 electric diverter; Honda e and Volvo EX30 Ultra Twin Performance electric vehicles with Myenergi Zappi mk1 & Ohme chargers


   
ReplyQuote
Toodles
 Toodles
(@toodles)
Famed Member Contributor
Joined: 4 years ago
Posts: 2694
11/09/2025 5:52 pm  

@julianc I occasionally see announcements on the ‘Onecta’ app about firmware updates but have not seen one in the last few days. All the updates I have received notifications for are done via the ‘net; I have not had any engineer’s visits to carry them out. Regards, Toodles.


Toodles, heats his home with cold draughts and cooks food with magnets.


   
ReplyQuote



JulianC
 JulianC
(@julianc)
Honorable Member Member
Joined: 5 years ago
Posts: 336
Topic starter 11/09/2025 5:57 pm  

@toodles thanks. I was told by the engineer that this had to be updated via a visit and not over t’internet.


Daikin Altherma 3H HT 12kWh ASHP with Mixergy h/w cylinder; 4kW solar PV with Solic 200 electric diverter; Honda e and Volvo EX30 Ultra Twin Performance electric vehicles with Myenergi Zappi mk1 & Ohme chargers


   
ReplyQuote
Page 16 / 16
Forum Jump:
  Previous Topic
Next Topic  



Share:

Join Us!

Worth Watching

Latest Posts

Click to access the login or register cheese
x Powerful Protection for WordPress, from Shield Security PRO
This Site Is Protected By
Shield Security PRO →