wrote in message
ups.com...

Toller wrote:
Mine has a screen over it, and it hasn't iced up.
And no, I didn't put it there...

Do you have a high-effeciency furnace? I think the exhaust is not so
hot (hence the high effeciency and PVC exhaust pipe).

Yes, a 93%

How cold does it get where you live?

Upstate NY; it frequently gets below zero

What brand of furnace do you have?

Lennox. The intake/output is a plastic thing with a grating built into it.
Maybe plastic doesn't ice up?
thanks,