Heat Pumps in Canada
I found this story from Atlantic Canada (Halifax, Nova Scotia) interesting.
The efficiency achieved at low (eg -20C) temperatures was something I can only envy.
The Grant technician who did my annual service yesterday agreed with me that it would be cheaper to run the DHW off the immersion heater, than off the ASHP, when the outside temperature was below Zero (here it touched as low as -8C in last winter's cold snap and the kWh consumption of my ASHP went off the scale). I'm going to try this the coming cold season. He also said that the cold damp weather we had, when the ASHP was almost permanently frosted up, was a problem.
Also from that Canada article note that the grid electricity is only 16 cents /kWh - that's about 9p/kWh. In my dreams.
Mike
Grant Aerona HPID10 10kWh ASHP
Interesting article Mike, Im surprised the technician said that about your DHW, as to be true your heat pump would have to have a COP of less than 1 at-8C. If thats true its not a good advert for Grant?
House-2 bed partial stone bungalow, 5kW Samsung Gen 6 ASHP (Self install)
6.9 kWp of PV
5kWh DC coupled battery
Blog: https://thegreeningofrosecottage.weebly.com/
Heatpump Stats: http://heatpumpmonitor.org/system/view?id=60
Here's a link to another recent study of the efficiency of heat pumps at mildly low temeratures, from a number of countries.
All very encouraging. I wish it reflected my own experience at mildly low temperatures.
Depending on the design and fitting of an individual installation I think there can be a significant difference between the efficiency of the pump itself and that of the overall installation.
Mike
Grant Aerona HPID10 10kWh ASHP
@mike-patrick That is certainly true Mike, have a look at this video from heatgeek

House-2 bed partial stone bungalow, 5kW Samsung Gen 6 ASHP (Self install)
6.9 kWp of PV
5kWh DC coupled battery
Blog: https://thegreeningofrosecottage.weebly.com/
Heatpump Stats: http://heatpumpmonitor.org/system/view?id=60
- 26 Forums
- 2,149 Topics
- 47.1 K Posts
- 47 Online
- 5,667 Members
Podcast Picks
Latest Posts
-
RE: is a home battery without an EV worth it?
I feel thats likely it, there are after all a lot of te...
By JamesPa , 29 minutes ago
-
RE: Electricity price predictions
Whilst I wouldn't want a wind turbine in my garden, I'd...
By JamesPa , 45 minutes ago
-
RE: Octopus tariffs - a quick comparison
Reminder.. ✅ All smart/time-of-use tariffs req...
By Tim441 , 1 hour ago
-
RE: Who's your electricity provider and what's your tariff?
I am pleased to see the change. We definitely need t...
By Jeff , 12 hours ago
-
RE: A Customer's Lessons Learnt from a Heat Pump Installation in a Large House
@jamespa Crossing sheep with kangaroos?
By Toodles , 15 hours ago
-
RE: How Do I Know When the Hot Water Has Run Out?
@transparent that is a very interesting suggestion, tha...
By GrahamF , 2 days ago
-
RE: The good, the bad and the not that great – my heat pump installation
Sorry to resurrect this thread, but it is sort of relev...
By cathodeRay , 2 days ago
-
RE: Getting the best out of a heat pump - is Homely a possible answer?
I missed your 22nd June post on this. I am sure it can ...
By cathodeRay , 2 days ago
-
Now posting on the right topic.... With general build...
By benson , 2 days ago
-
RE: How to waste energy (and time) playing with AI.
I’m sure like many software toys that it is addictive! ...
By Judith , 2 days ago
-
RE: Does anyone have experience of a smart water meter?
@judith With Anglia Water it was a compulsory upgr...
By TechnoGeek , 3 days ago
-
RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff
We’re high energy users other than the ashp so the OVO ...
By Judith , 3 days ago
-
RE: Midea ASHP – how to set weather compensation
Something isn't right here, you don't design ufh to wor...
By JamesPa , 3 days ago
-
RE: What crazy nonsense are inverter limits and why are they imposed?
No I'm not mining anything @drei but I am doing R&...
By Transparent , 3 days ago
-
RE: Rodents! A word of warning for heat pump owners
Wasps caused frequent tripping of my lighting circuit a...
By JamesPa , 3 days ago
-
RE: Ecodan & MelCloud scheduling
Yes, the 2 are separate. To add to the complex desig...
By HCas , 5 days ago
-
I should clarify that the FoxESS web interface is not l...
By Old_Scientist , 5 days ago
-
RE: Mitsu Wireless Controller and MelCloud
@robs Hi Rob, At the end of a note to Mitsu UK, thank...
By DavidAlgarve , 6 days ago
-
RE: Why so many sigenergi installer recommendations?
@adamk Tesla is a great option, it’s also one we instal...
By SAEnergy , 6 days ago
-
RE: Flexi-Orb Heat Pump Scheme: A Game-Changer for the UK's Heat Pump Industry
As a potential heat pump customer, it would be good to ...
By Temperature_Gradient , 6 days ago