Is this becoming more common or just my imagination?

[WaterTight]

As a disclaimer I just do small maintenance in wet plumbing. So I'm a bit limited in overall knowledge and skillset and will get lost if things get overly technical.

When I started 6 or so years ago everyone seemed either to have a combi for heating and domestic hot or a vented system with a couple of tanks in the loft and a cylinder in the airing cupboard.

Now more and more I've found people will have the system split one way or the other. So they may keep the cylinder for domestic hot but have a combi installed just for heating. I seem to see this more and more. Is there a good reason for this and is it likely to get more common?

Also, does this mean the coil going through the indirect cylinder is now mains pressurised? I guess it must be.

Thanks

 

[ShaunCorbs]

normally combi and unvented cylinder as there is more than one bathroom/ big bathtub

and normally after they have had a combi installed they find out why there not very good for more than one bathroom

 

[dancinplumba]

Combi cheaper than system boiler ?

 

[Best]

The coil on the cylinder will just be linked to the heating system, - not the mains hot from combi.

 

[WaterTight]

Would it not be pressurised to 1-1.5 bar ish though? Like the heating circuit off a combi would be normally?

 

[WaterTight]

This might be where my ignorance gapes open. Main reason for the thread.

 

[WaterTight]

*1-1.5 ish when cold

 

[ShaunCorbs]

*1-1.5 ish when cold

yes in the coil would be 1.5max cold heating water heating the water in the cylinder

 

[WaterTight]

Is this more and more common or is it just my local area doing it for some reason?

 

[plumben]

Yeah I've seen few Combi's with hot water from the Combi to the kitchen tap or kitchen tap and cloak room toilet then cylinder either unvented or vented

had a good one where the Combi's heating side was open vent so the pressure in the boiler was 0.6 constantly

 

[hammers4spanner]

Yeah I've seen few Combi's with hot water from the Combi to the kitchen tap or kitchen tap and cloak room toilet then cylinder either unvented or vented

had a good one where the Combi's heating side was open vent so the pressure in the boiler was 0.6 constantly

Just changed one like that old wozzie out which had heating fed by tank in the loft

 

[plumben]

Just changed one like that old wozzie out which had heating fed by tank in the loft

I had good hour or 2 looking for a filling loop, the customer never mentioned the tank in the loft when I asked

 

[WaterTight]

/\ This is part of the problem.

I used to know how to work out what system I was dealing with before I'd passed the front door. Now I need to go looking. Last place I had to go into the loft and the garage before I could work it out.