Search with Wattson
Activity
 
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!

bobflux
bobflux
@bobflux
Member
Reputable Member
Joined: Feb 22, 2026
Last seen: Sep 25, 2026
Topics: 1 / Replies: 180
Reply
RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S

A calibrated heat meter is an option, it is not cheap, but it is still much less expensive than choosing the wrong heat pump...

3 weeks ago
Reply
RE: Next steps on my ASHP journey: Radiators and Pipework

Flow rate is set by pressure created by the circulator versus resistance from pipes, valves, etc. On most heat pumps, circulator speed is adjustable, ...

3 weeks ago
Reply
RE: 7kW EV Charger Options Advice

Yeah that's normal Copper is expensive, and the kettle is rated for intermittent use, so they're not going to fit a plug and cable rated for constan...

3 weeks ago
Reply
RE: Glass lined Cylinder for private water supply

One thing that bothers me with DHW from monobloc A2W heat pump is they quite often want their own cylinder, which usually comes in a big white box wit...

3 weeks ago
Reply
RE: 7kW EV Charger Options Advice

I have installed an EVSE. I'm French, so I have no idea about the bureaucratic red tape or special subsidies you'll get. While it is usually called ...

3 weeks ago
Reply
RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S

OK. If you had two different flow temps and were going for 2 heat pumps, I was about to suggest splitting the installation, one high temp heat pump fo...

3 weeks ago
Reply
RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S

Is the flow temperature for the rads and the underfloor heating different?

4 weeks ago
Reply
RE: Switch suitable to change between two inverter CT's

If the goal is to avoid discharging the battery during cheap electricity times, you could use the Solis scheduler (I think it's called "timed charge")

4 weeks ago
Reply
RE: Switch suitable to change between two inverter CT's

It's a current output CT (33mA output for 100A input or 1:3000) so it should never be used unloaded. It's the opposite of a battery: a battery is a ...

4 weeks ago
Reply
RE: Switch suitable to change between two inverter CT's

It depends An unloaded current transformer can output a dangerously high voltage which may cause your switch to arc over, or it can cause arcing ins...

4 weeks ago
Reply
RE: Do I add Air Con or MVHR to existing A2W ASHP?

Dehumidifying is a side effect of cooling the air, so pretty much all air conditioning units are also dehumidifiers... It blows air over the evapora...

1 month ago
Reply
RE: Do I add Air Con or MVHR to existing A2W ASHP?

About the original question: Flow rate for MVHR is adequate for ventilation, but way too low for air conditioning. Heat capacity of air is only 12...

1 month ago
Page 2 / 16
Share:

SPONSORS

Join Us!

Installer Finder

Degrees of Separation

Latest Posts

SPONSORS

Members Online

Click to access the login or register cheese
Protected By
Shield Security PRO