I drove by a branch of our bank today and saw this:

Well, I'm not a furnace expert but I am a home buying expert and I see a problem with that. Do you?
As it turns out the original installer got his/her air input and air exhaust lines switched. Which pushes warm moist combustion air right against the brick wall. And it freezes. This probably isn't dangerous now, but it will damage that brick if it is left uncorrected long enough.
So, did you see know what was happening? Hundreds of people have driven by this same thing and not know what was going on.
I actually mentioned it to the bank teller last year but I can see they haven't fixed it. So today I went in and told the manager and she gave me the maintenance person's name.
I bet they will fix it this time.
If you are interested to get more information on these "concentric vents" and how they should be installed I pulled up some information:
http://www.dnmech.com/lit/good_dcvk_IO-619A.pdf
Remember if you want an unconflicted, true buyer agent to help you with your home buying, call us.
Jon Boyd, Broker/Manager
The Home Buyer's Agent of Ann Arbor, Inc.
Click here for information on Ann Arbor real estate homes for sale
member office of http://naeba.org
734-662-6240
1908 W. Stadium Blvd. Ann Arbor, MI 48103
Ann Arbor's Most experienced Exclusive Buyer's Brokerage!
Great post Jon. Exclusive Buyer Agents try and point out problems they see with homes, even if they might keep the Buyer from buying. (Or should I say ESPECIALLY when they might keep the Buyer from Buying!) Nice to have someone looking out for the Buyers in Michigan right now, I'm sure!