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!
Hot water cylinders for ASHP systems - backwards compatibility
My last attempted house purchase went terminally wrong pre-exchange, so on to the next one.
The new candidate has a new-ish oil boiler, but an old-style open vented water system. I’m thinking of updating to a pressurised system, but would want the cylinder to be both ASHP-ready and electrically heated via a solar diverter if we fit panels. I’m assuming we’d need a cylinder with a high-efficiency coil like the gledhill StainlessLite Plus HP models.
Question is do these high-efficiency tanks still work with conventional higher-temperature boilers? I can’t see why not in principle.
Yes Neil, that’s should be absolutely fine - high efficiency tanks and boilers tend to typically work OK.
🔥 Britain’s Heat Pump Shitshow
How Installing a Heating System Became a National Nervous Breakdown
Free UK shipping.
📗 Heat Pumps Explained
A Jargon-Free Guide for Homeowners
Rewritten and updated for 2027
📘 From Zero to Heat Pump Hero
🛠️ Bodge Buster
New to heat pumps?
Take the Heat Pump Fundamentals course and use INTRO50 at checkout for 50% off.
- 27 Forums
- 2,788 Topics
- 65.9 K Posts
- 2,534 Online
- 7,192 Members
Join Us!
Installer Finder
Degrees of Separation
Latest Posts
-
RE: Jokes and fun posts about heat pumps and renewables
Damn, I pressed the button on my new heat pump too soon...
By ian33a , 1 hour ago
-
RE: Safety study for plug in batteries out to tender - looks like Q3 2027 at best before legal
I think it may depend how much of the world is on fire ...
By EtchedPixels , 5 hours ago
-
RE: Air-to-Air Heat Pumps & Air Conditioning: UK Heating and Cooling Q&A
I hope it's not the same people who make the awful TV s...
By EtchedPixels , 6 hours ago
-
RE: Why are ASHP installs so expensive?
ECO4 is classic British idiocy, "save" money by requiri...
By EtchedPixels , 6 hours ago
-
RE: Renewables & Heat Pumps in the News
We need more building inspectors anyway and less self-s...
By EtchedPixels , 6 hours ago
-
RE: Does anyone have experience of a smart water meter?
@majordennisbloodnok That is my thinking precisely, I s...
By Toodles , 14 hours ago
-
RE: Replacing Storage Heaters with a Heat Pump in a Stone Cottage
I found some interesting data about the price of heat p...
By Rob of York , 20 hours ago
-
RE: PV and battery long payback - sense check query
Thanks for all the comments. I finally got to the bott...
By DavidB , 22 hours ago
-
RE: Indevolt Batteries UK Support & Info Thread
People following this thread who are hoping that plug i...
By JamesPa , 1 day ago
-
RE: Passiv Smart Thermostat - Help & Forum Support
By Singlespeed , 1 day ago
-
RE: Help me keep the faith with my air source heat pump installation
just had Vaillant over to service the HP and asked abou...
By AdamK , 1 day ago
-
RE: tepeo ZEB UK Support & Info Thread
OK so ZEB is basically a variant on a storage heater, b...
By JamesPa , 3 days ago
-
RE: Heat Geek installations: share your experiences
@editor I suspect that the Heat Geek online quote is a ...
By AndrewJ , 3 days ago
-
RE: Adding additional Solar Panels to a DC coupled battery system
Ah, yes. Thanks for clarifying.
By Transparent , 3 days ago



