Advice required

[PeterW]

29 minutes ago, Russ P said:

Them Buffer tanks ain't cheap are they ???

 

You can do it with a standard hot water cylinder - just get a direct one and use the tappings with a T and that will work fine. 

 

Bear in mind though a standard tank can only do 1.5 bar - other option is an indirect tank and then run the UFH off the water stored. 

[joe90]

Just found this thread and about to start my UFH so found it interesting, due to illness and bad planning on my part we are having a liquid screed and just read...".Remeber that liquid screed is a real pita to get anything ( like tiles ) to stick to"...... ( from Nick) . What can I do to aid sticking tiles and or block flooring to my liquid screed please.

[oranjeboom]

3 minutes ago, joe90 said:

Just found this thread and about to start my UFH so found it interesting, due to illness and bad planning on my part we are having a liquid screed and just read...".Remeber that liquid screed is a real pita to get anything ( like tiles ) to stick to"...... ( from Nick) . What can I do to aid sticking tiles and or block flooring to my liquid screed please.

Think I read on BH somewhere that it can be 'sanded down' by a few mm to get rid of the scummy top. But I'm sure the experts on here know more...

 

ahh found them:

 

and 

 

 

Edited August 25, 2017 by oranjeboom

[Nickfromwales]

18 hours ago, PeterW said:

You can do it with a standard hot water cylinder - just get a direct one and use the tappings with a T and that will work fine. 

Can you explain? 

I was thinking the whole house heating and the Ufh would all heat off a medium size buffer. The heating load sounds quite minimal so maybe the better option if one is being bought anyway?

@Russ P, your other option is just to live with the short cycling and lower efficiency running but it's not good. 

The buffer would need tappings for the Ufh flow and return, another pair for the radiators, and also another pump for the radiator circuit. The boiler pumps to the buffer instructed by the cylinder stat on the buffer, so the boiler lights, runs at optimal flow temp for condensing and efficient operation, and heats the buffer to the set temp. The rads and Ufh then consume this indirect stored hot water at the rate that they want and no more. The buffer temp can be set quite low, say 50oC, so the heat loss from it is minimised. 

Do you have an airing cupboard? 

[Onoff]

19 hours ago, Russ P said:

Them Buffer tanks ain't cheap are they ???

 

Tell me. Maybe we could share one if we could get some cheap pipe?

[Nickfromwales]

@Russ P

@Onoff

If you both buy at the same time Trevor @ Cylinders2go would give a bit more discount. Pm each other ASAP as there will be a price increase at the start of September!!! 

[PeterW]

38 minutes ago, Nickfromwales said:

Can you explain? 

 

Probably ..... 

 

treat the tank like a low loss header - tee into the top and bottom connections so that the tank bridges the flow and return. Boiler to one side, UFH to the other. UFH will pull from the tank as needed - if the boiler pump is running it will just use the least resistance flow which is to go via the tank. 

 

You could always put it in as the final "radiator" in the circuit too and wire the tank stat and room stat in parallel so it keeps going once the rooms are satisfied but that may need you to do some clever controls 

[PeterW]

3 minutes ago, Nickfromwales said:

@Russ P

@Onoff

If you both buy at the same time Trevor @ Cylinders2go would give a bit more discount. Pm each other ASAP as there will be a price increase at the start of September!!! 

 

Errr add me to that ..!! 250 litre HP UVC ..!

[Alexphd1]

Yeah I need a thermal store as Well. 500l .

[Nickfromwales]

1 minute ago, PeterW said:

 

Errr add me to that ..!! 250 litre HP UVC ..!

Start a PM and invite me. I'll ping Trevor and the more the merrier. 

Thanks to @Crofter for the heads up on the price rise, confirmed by me by phone so it's 100% real.  

[Nickfromwales]

1 minute ago, Alexphd1 said:

Yeah I need a thermal store as Well. 500l .

I'll link you into the pm when it gets rolling. ?

[Nickfromwales]

I'll chuck a thread up now. Think that may be better as it's around a 10% hike ( Telford end not Trevor's end btw ).  

[Alexphd1]

I wil send you my quote reference tonight. 

[PeterW]

@Nickfromwales it's on FMG for now ... 

[Onoff]

I haven't a clue what size I need? 

[Triassic]

4 minutes ago, Onoff said:

I haven't a clue what size I need? 

Neither have I !    

[joe90]

Nor me?, just know I need an UVC for two people, must pull my finger out and make these decisions

[PeterW]

@joe90 go for a 250l HP UVC and you won't be far wrong... price difference for 200-250 is buttons. 

[PeterW]

There is a separate thread running for this now in Market Place 

 

 

[joe90]

11 minutes ago, PeterW said:

@joe90 go for a 250l HP UVC and you won't be far wrong... price difference for 200-250 is buttons. 

Peter, thanks for this, just to be sure it's for DHW at mains pressure driven by an ASHP which is driving UFH as well ( which I believe needs a buffer tank ( size ?). Gosh I really need to get my head around this.

[PeterW]

Right @joe90 I've got ....

 

- 250 UVC with a HP coil. Immersion for legionella control and nightly boost to 65c

 

- 90 litre buffer (std direct cylinder) for the UFH and as a preheat for the DHW via plate heat exchanger 

 

- 9KW ASHP 

 

All on E7, no PV...

 

 

 

[Russ P]

On 26/08/2017 at 10:19, Nickfromwales said:

I'll chuck a thread up now. Think that may be better as it's around a 10% hike ( Telford end not Trevor's end btw ).  

Telford end???

[Nickfromwales]

1 minute ago, Russ P said:

Telford end???

Manufacturer increase not resellers increase . 

[Russ P]

1 minute ago, Nickfromwales said:

Manufacturer increase not resellers increase . 

Are they based in telford or is that company name

 

[PeterW]

2 minutes ago, Russ P said:

Are they based in telford or is that company name

 

 

Both .....