Holiday mode vs thermostat control
Hi everyone, I’m sure this has been asked before but I couldn’t find quite the same q when I looked.
If I am going away in winter, so with a possibility of freezing temps, is holiday mode a better option than just turning the thermostat down to say 15 degrees and turning off the HW?
I know how to it by date, but I don’t know what my holiday mode settings actually are - I looked on YouTube and didn’t find this covered. Is it standard or does it different by installer?
Thanks!
I believe 'holiday mode' achieves the same thing i.e. during the times you mark as holiday, a fixed temp target is set. This tends to be controlled by a room thermostat. There will be "anti-freezing" settings on your HP to stop it from freezing, but you might want higher than that. It probably depends on how long you are away, and whether you want to try "pre-heating" your house before you return, as a HP will take a long time to get your house from, say, 10C, back up to 20C on your return.
Personally, I'd just flip things down to 15C and ignore any holiday mode. Given HW heating is a fraction of heating costs, and it'll take very little energy to maintain a cylinder that's not being used, I'd leave HW heating on. Just remember that a static tank is more like to encourage Legionella than one being used. I've read that running HW for 5 minutes on return is a good idea. (the Heat Geek article on Legionella is very good).
Grant Aerona 3 10kW
@mikefl thank you! Yes I think I’ll do that, and then maybe run a quick legionella cycle on return. And hope it’s not too cold when we get back so we can heat back up again in not too long!
- 22 Forums
- 2,057 Topics
- 44.9 K Posts
- 64 Online
- 3,299 Members
Join Us!
Trusted Installers
Struggling to find a reliable heat pump installer? A poor installation can lead to inefficiencies and high running costs. We now connect homeowners with top-rated installers who deliver quality work and excellent service.
✅ Verified, trusted & experienced installers
✅ Nationwide coverage expanding
✅ Special offers available
Latest Posts
-
RE: Is Your 6kW Air Source Heat Pump Really a 6kW?
There are various ways to look at things related to CoP...
By Johnmo , 3 hours ago
-
RE: IVT Greenline high pressure switch and electrical cassette errors
@abbote thanks for that advice.There was a bit of air i...
By tdudgeon , 4 hours ago
-
RE: Heat Pump Manufacturers Recommending Buffer Tanks
One manufacturer Viessmann has to have their buffer, as...
By Johnmo , 6 hours ago
-
RE: How To Balance Radiators & the Role of the Lockshield Valve: A Homeowner's Guide
Good luck, I hope it all works out!
By JamesPa , 24 hours ago
-
@johnd it's a difficult one, because we've seen instanc...
By Mars , 1 day ago
-
RE: Is your heat pump insured?
@johnmo sorry it comes across like that. The post is au...
By KevinPotts , 1 day ago
-
RE: Getting the best out of a heat pump - is Homely a possible answer?
@johnmo Perhaps a little detail might explain my reason...
By Toodles , 1 day ago
-
Win a 6-panel PV courtesy of egg and Renewable Heating Hub
Our epic giveaway just went live! Want to win a 6-pan...
By Mars , 2 days ago
-
RE: Yes, the "zoning with ASHP" topic again...
James, thanks again for your thoughtful and persistent ...
By HarryRea , 2 days ago
-
RE: Is this normal? Click of the DHW returning to space heating
So the Lone Ranger returned today! Even though we thoro...
By Grantmethestrength , 2 days ago
-
RE: Vaillant & OVO partner up to offer Heat Pump Plus
Hopefully iv done the right thing today by signing up t...
By Westkent , 2 days ago
-
RE: Battery sizing - How low can you go!
My own experience with connecting four batteries to thr...
By Transparent , 2 days ago
-
RE: Plate heat exchanger considerations
Work on 2-3 percent per degree. This is a reasonable e...
By JamesPa , 3 days ago
-
RE: Advice for ground source heat pump in new build with PV and batteries
The useful bit is the bit that specifies the heat loss ...
By JamesPa , 3 days ago
-
RE: Volumisers in Heat Pump Systems: Does Placement Matter?
You’re absolutely right that during defrost the refrige...
By Mars , 3 days ago
-
@editor thanks Mars that’s the same table I found in th...
By Gary , 3 days ago
-
RE: Tariff and charging strategy advice please
They haven't asked me to prove that I have an EV (I do)...
By JamesPa , 3 days ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
Took a while to find on the OFGEN site: ”The FIT sche...
By AgentGeorge , 3 days ago
-
RE: why solar diverters for HW instead of the heat pump?
For me there are few factors why you may want to heat w...
By Johnmo , 3 days ago