Play: "Spot the problems"

Not the case here. This was a “replacement” heating system to deal with the non -functioning boiler in the basement. The supply ducting from this FAU was installed open through out the living space.

Someone did this who has enough knowledge to do this kind of work but is not fully versed in installing natural gas burning appliances.

Hence the new 2007 law for all buildings with living spaces to have a CO detector is a start. (The authorities simply do not have enough staff /personnel to inspect/ find these unsafe/ unlicensed/ unprofessional installations. I would even venture to say this is not that rare. Many questionable installations are done in Chicago on a regular basis.

This looks like a recent changeout as apposed to new house installation. That would answer the first question of how did it get past the municpal inspector.
Next, I see-
-Singlewall vent piping through drywall ceiling with no firestop (Must be B’ vent material with 1" min. clearance and firestop)
-No dripleg in gas line (needed to collect condensation & debris)
-L/V t’stat wiring thru R/A filter track - no protective rubber gromet
-Open R/A plenum-Front- Combustion air and flame rollout possible
-No visible Hi/Lo combustion air in closet (from an outside source)
-Clearance of Furnace from combustible materials, especially front panel
-No Plenum or Ductwork insulation or mastic/sealant at joints; although no insulation is needed if ductwork is incapsulated within conditioned space
-I don’t see a Cond. Pump, Ref.Lines - I assume no A/C is installed
-Bottom panel critical for fan switch operation and to avoid backdrafting or flame rollout during operation, even with an induced draft fan system on this 80%+/- AFUE rated furnace
-I’m probably missing something else, but…



I’ll have to disagree with you with regard to louvered doors. Some wooden louvered doors can allow for about 85% total louvered opening, which is more than sufficient. As to clearances, sometimes there are simply insufficient working space in these utility rooms, which the architect, AHJ, and gas company in our parts okay on a regular basis.

I was mistaken, and thought that the ducting to the lower right exited the room. I didnt realize until looking at the photo again that the return was in the same room. In most raised ranch hmes with forced air systems, the return is on the opposite side of the utility room wall, less than 2’ from the furnace intake. Louvered door adjacent to the return duct in many cases.

And, we can both agree that this installation was poorly executed…

Wow, How do you change the laws of physics for some wood louvre’s and not others.?? (they all have the same amount of gap between them)

Wood Louvre’s only allow for 25% of its total area for air flow. This is how it is. If you have 100 inch louvred vent that is made of wood, it only gives you 25 inches of free air flow for combustion air and not 100 inches of free air flow…You can’t change this fact. This is so very important to know if you say that the combustion air is ok. These calculations are imperative and someones life could depend on it.

If you have a metal louvered vent that is 100 inches, then you have 75 inches of air flow for combustion air. (7th line down)

Nothing personal, but I think you fellas are trying to get too technical in regards to louver sizes and free areas. Unless you are a P.E. or an expert in this area I would say, “Keep it simple.” There is more than enough “not right” here to recommend corrections be made by a qualified HVAC person. Absolve yourselves of liability.