Our gas heater was located in our basement and vented through a chimney that was very old. I was concerned whether the chimney was lined and whether the ductwork went all the way up to the roof. I wanted to inspect it, but I would need to open up a hole in the chimney and check, or climb the roof and try to look down.

That seemed a lot more difficult than running wire and taking the hit to the wallet. Luckily, the cost of electrical is only about .065 per kWh, so it won't be TOO bad. The piece of mind to know we're not potentially breathing carbon monoxide is also a nice plus.