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Discuss Unvented multi zone system. in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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Hi all,

I'm in the process of upgrading my heating system my pro proposed plan below.

Move existing boiler into loft (ideal heat + 18)

Brand new kingspan tribune he 180l unvented indirect in loft next to boiler.

Every room on own zone 6 in total.

Nest gen3 in living room and dhw control.

Every other room on dt92e wireless stat's. Seems expensive to have all nest stats.

Re plumb all rads to acomadate the single zoning.

Feed up of heating a room when theirs no need. Also have thermo valve's but their just not acurate enough.

Thoughs please, also cousin is doing the tank he's G3.

Thanks Matt
 
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Hi all,

I'm in the process of upgrading my heating system my pro proposed plan below.

Move existing boiler into loft (ideal heat + 18)

Brand new kingspan tribune he 180l unvented indirect in loft next to boiler.

Every room on own zone 6 in total.

Nest gen3 in living room and dhw control.

Every other room on dt92e wireless stat's. Seems expensive to have all nest stats.

Re plumb all rads to acomadate the single zoning.

Feed up of heating a room when theirs no need. Also have thermo valve's but their just not acurate enough.

Thoughs please, also cousin is doing the tank he's G3.

Thanks Matt
Switch the nest for a Hive;)
 
Or evohome the lot and you won't have to re pipe all the rads
 
Or evohome the lot and you won't have to re pipe all the rads

Was looking into the EVO home system. But was reading reviews that's it was only reading the temp near to the rad. But also seen the wall mounted stats but don't know if these connected to the stat on the rad if that makes sense.
 
Was looking into the EVO home system. But was reading reviews that's it was only reading the temp near to the rad. But also seen the wall mounted stats but don't know if these connected to the stat on the rad if that makes sense.

Have a word with the evo home shop great set of guys
 
I think multizone systems are great if you're able to afford the labour cost/are DIYing. You can heat any room you want without needing to heat the rest of house, and you never find yourself with a cold room because you've just turned the rad on in a room and there is no call for heat from the thermostat.
Just bear in mind your radiators may need to be slightly larger to accommodate increased heat losses through internal walls when you have one unheated room adjacent to a heated room, and worth lagging pipework if it passes through/under a potentially unheated area to reach a heated area.
Good luck with your project!
 
Thanks ric2013,

All pipes will be lagged in rockwool pipe insulation. Currently have no insulation under the suspended timber floor downstairs so getting under the floor this Weekend and insulating :). Don't know weather to do all pipe work to the rads in plastic or copper?
 
Thanks ric2013,

All pipes will be lagged in rockwool pipe insulation. Currently have no insulation under the suspended timber floor downstairs so getting under the floor this Weekend and insulating :). Don't know weather to do all pipe work to the rads in plastic or copper?
Use copper ( would be my prefference) and don’t use the wool stuff use the insulated stuff. It’s a little more expensive but much better
 
Thanks ric2013,

All pipes will be lagged in rockwool pipe insulation. Currently have no insulation under the suspended timber floor downstairs so getting under the floor this Weekend and insulating :). Don't know weather to do all pipe work to the rads in plastic or copper?

Copper all day
 
They both work, and it certainly easier to cable through joists using plastic. Copper gives slightly higher flow rates, but depends how much flow you need anyway. And copper is arguably more reliable. I certainly do not like pushfit joints under the floor.
 
Is this the one with the silver foil round it?

Yes but normally used on commercial projects or armaflex pipe insulation
 
Drayton Wiser sounds interesting. So all you need is to replace the programmer and fit the Wiser TRVs and any TRV can call for heat? In which case, I'm confused about the need for a room thermostat though...
EDIT - I get it, the room stat is the interface for each radiator thermostat and acts as the setting point. But, just looked at the manual and it seems it needs a Smartphone and internet just to get it working. I can see customers wanting it, but I wouldn't.
 
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Your right mate. Not for everyone but who am I to judge. Decision stands win when OP

I really like the wiser set up, but I'm worried about reliability with the internet connection etc. Also I'm still pumping hot water around pipes I dont want to if you get what I mean. Where if there all piped and zoned separate I'm sending hot water to 1 specific place not round a loop connecting all rads together.

Matt
 
I really like the wiser set up, but I'm worried about reliability with the internet connection etc. Also I'm still pumping hot water around pipes I dont want to if you get what I mean. Where if there all piped and zoned separate I'm sending hot water to 1 specific place not round a loop connecting all rads together.

Matt
Yes but as the room reaches temp the trv head shuts the flow to that rad down. But it’s your call. You have to live with it.
 
I do see your point about the pipework, but bear in mind, if you have a couple of lengths of 22 splitting off to a few rads, and the radiators are off, there will be no flow to heat up that section of pipework. On a two-pipe system, it isn't a loop as such.
Of course, a manifold system does have less water in it, but you may find that the heat loss from several lengths of narrow pipe is the same as that from one piece of 22. Unless you really only intend to heat one room and the house is very large? Of course, it is up to you as only you know the details and what is important to one person is not important to another, so you will ultimately choose what you feel is right.
That said, it sounds like you are giving this some thought, and I look forward to hearing of your progress.
 
And a lot less cost you seen the price of decent 22 mm 2 port valves I wouldn't be far off thinking about 1k for the port valves and stats
 
This sort of thing, Shaun?:
upload_2017-12-15_15-55-32.jpeg
 
Or Evohome Ufh controller and you can use DTS92 wall stat to control the zone actuators. Or use DTS92 in conjunction with Radiator controller.
 
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