10kW Viessmann Vitocal 200-A with Vitocal 222-A
Good Morning All
After following the threads on this site, I feel I need to introduce myself and provide a summary of my system.
We moved into a new barn conversion in 2022, the majority of the work was completed by myself and my wife, employing trades as required. The build was effectively a new skin inside the old barn, all on one floor, of 195sq meters, underfloor heating throughout. Because of this we knew exactly how much insulation was in the property and the U values of all the windows and doors. Theoretically this should of given us an accurate energy performance figure to size the air source heat pump. We have a 10Kw Viessmann Vitocal 200-A external unit, with a Vitocal 222-A Indoor Unit with integrated 220L DHW cylinder. As we installed all the insulation and took great care in making it to the best we could, and to a higher standard than most builders, the pump is slightly oversized for the property, this doesn’t seem to be a problem with the Viessmann unit, and it modulates its output down to about 25% capacity very easily. Coupling the heat pump with the underfloor heating, and a low loss property, means we can run it at low temperatures, current WC slope has 27° @ +10, 30° @ 0 and 32° at -10.
We used our Local plumber to do the install, he was keen to start fitting heat pumps even though this was his first, we were very happy with his work using his plumbing experience has avoided some of the problems others have had. Because he hadn’t fitted any before I agreed to set up all the WC etc. and feed back to him my findings. At some point in the future I will post my experiences with this.
Welcome to the forums @mikef – how is your system holding up? You please with it so far?
Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb
Subscribe and follow our Homeowners’ Q&A heat pump podcast
- 22 Forums
- 2,057 Topics
- 44.9 K Posts
- 43 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: Heat Pump Manufacturers Recommending Buffer Tanks
Not a buffer or volumiser in the normal sense. The buff...
By Johnmo , 26 minutes ago
-
RE: Rate the quality of your heat pump design and installation
@davesoa very good to know... I'll convey this to Clayt...
By Mars , 1 hour ago
-
RE: IVT Greenline high pressure switch and electrical cassette errors
OK, so when the HP comes on it becomes obvious.It's on ...
By tdudgeon , 5 hours ago
-
RE: Is Your 6kW Air Source Heat Pump Really a 6kW?
@johnmo I think we’ve been trudging through the same...
By SUNandAIR , 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 , 1 day 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 , 4 days ago