Search with Wattson

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!

Two heating zones to one zone

Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls

Last Post by JamesPa 11 hours ago

6 Posts

2 Users

1 Reactions

41 Views

RSS

Profzarkov

(@profzarkov)

Trusted Member Member

Joined: 2 years ago

Posts: 65

Topic starter 05/05/2026 11:30 am [#2981]

Just a quick one...

I have a two zone system - daft really as we're in a bungalow & the second zone is just the two bedrooms. I've replaced the stupid neomitis thermostat in zone one with an old Hive one - mainly so I can control & monitor things. What's the easiest way to make it just one zone? I have motorised valves for both zones.

I had thought of just connecting the two "demand"s together?

Steve

This topic was modified 15 hours ago by Mars

Quote

JamesPa

(@jamespa)

Illustrious Member Moderator

Joined: 3 years ago

Posts: 4799

05/05/2026 12:31 pm

What do the thermostats connect to?

Generally the easiest way to make something single zone is simply to turn all thermostats to max so they are effectively disabled, and run on weather compensation alone. Is there a reason not to do that?

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.

ReplyQuote

Profzarkov

(@profzarkov)

Trusted Member Member

Joined: 2 years ago

Posts: 65

Topic starter 05/05/2026 2:19 pm

Well, as per previous posts, I'm working towards that...

I think my weather compensation needs tweaking:

I've adjusted a few parameters

201 is now 16°. -4°

202 is now 27°. 43°

If that makes sense.

See what happens next winter."

ReplyQuote

JamesPa

(@jamespa)

Illustrious Member Moderator

Joined: 3 years ago

Posts: 4799

05/05/2026 2:57 pm

I would just do this and turn up the stats. Otherwise you will need to work out what both are controlling and how to rewire. You also need to check if it’s 240V logic or 5V logic. All very doable, but easier just to turn the stats up, at least initially until you have proven what you want.

This post was modified 5 hours ago by Mars

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.

ReplyQuote

Profzarkov

(@profzarkov)

Trusted Member Member

Joined: 2 years ago

Posts: 65

Topic starter 05/05/2026 4:16 pm

@jamespa are those temperatures ok?

ReplyQuote

JamesPa

(@jamespa)

Illustrious Member Moderator

Joined: 3 years ago

Posts: 4799

05/05/2026 4:19 pm

@profzarkov

They arent obviously wrong, but the only way to determine the right temperatures is to adjust it (with all zones open, thermostats to max, operated 24x7) until the house temperature is right. They are house dependent and there is now way around that! I would leave 27/16 and if necessary adjust 43 if necessary next season. It needs to be cold to make these adjustments!

This post was modified 11 hours ago by JamesPa

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.

👍

ReplyQuote