Q. We had a chimney cleaning service inspect our chimney and they suggested that we install an insulated flexible aluminum flue liner in our chimney connected directly to our gas water heater vent.

That new high-efficiency furnace you’re installing might come at a high price: a buildup of carbon monoxide around the water heater or condensation in the chimney. The source of the problem is what ...

“That’s too much — no one else even mentioned we’d need an expensive liner — you trying to rip us off here?” Chimneys — you can’t live with them and you can’t live without them — or at least you ...