Flue cages

[MarkOil]

So here's a question, I find a fair few old cages on SE boilers that have rotted away and become very sharp, is that just the norm that they need replacing?
Also, should cages for new condensing flues be plastic, plastic coated or stainless?

 

[Best]

Stainless Steel is the only metal cage that won't rot. The flue gases will even damage any galvanised cages. Plastic coating tends to rot in the sun.

 

[Ermintrude]

Just a part of service in my books. If basket gone add an extra on . Nothing's invincible

 

[lame plumber]

why is a cage required on a condensing flue, not hot enough to burn you?

 

[SimonG]

why is a cage required on a condensing flue, not hot enough to burn you?

Been asking that question since the steamers came out.

 

[Killy Bing]

What do you do when you fit an external oil boiler, screw it to the case?

 

[SimonG]

What do you do when you fit an external oil boiler, screw it to the case?

Worcesters have four machine screws on that crappy external flue kit. Warmflow gets nothing but the bits that come with it.

 

[MarkOil]

think on the new ones it's probably to give it a bit of protection. could I also use stainless on the old boilers? Could just keep a few of them on my van then.

 

[Best]

Stainless steel flue pipes last forever, so proper stainless steel cages will do same.
I think the cages stop you bumping into the sharp flue.

 

[Roger Welton]

and poking rubbish in the air intake /. flue

 

[heliotrope]

why is a cage required on a condensing flue, not hot enough to burn you?

Prevention, as with any low level flue.

Prevent fingers getting trapped , prevent foreign objects being pushed in.

Prevent damage to terminal, prevent tea towels, gloves etc hung over to dry (yes I've come across this on several occasions).

Among other reasons.

 

[Soggy]

Terminal guards have always been to protect the terminal. The protection of the user is secondary.

 

[WHPES]

why is a cage required on a condensing flue, not hot enough to burn you?

I asked the very same question to Grant some time ago and they said they are to keep leaves, birds, rodents and other foreign objects out of the flue or air intake rather than for protection of persons.

 

[lame plumber]

which begs the question as to why gas flues dont require a cage if the outlet is over 2m high!!!