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This furnace had no combustion air ducts run to the equipment room. This is a code and is also a VERY UNSAFE condition that MUST be remedied! We will have to knock out (2) 6" square holes in the brick wall above the basement window pictured below.

Below, we have found where the ducts will run in the joist space and have marked the wall. This wall was particularly difficult as each yellow brick was poured with concrete inside each brick. A cement chisel is used to make the rough hole and then it must be finished by chipping to the exact size. Expect to pay more for a wall like this as going through a wooden wall is obviously much easier and less time consuming.

Below is a close up of the interior of the wall. Note the crack to the right of the hole. This happens no matter how careful you are trying to be. The grille will cover this crack however.

Below we have installed one of the ducts complete with the combustion air grille. The grilles are made for this purpose and are slanted to direct rain water away and have a screened opening to keep unwanted visitors out of the basement. One duct will end up near the furnace and water heater and will be left high at ceiling level. The other duct will be extended to within 12" of the basement floor using elbows. This completed combustion air system installation will supply fresh air to the gas appliances and keep the equipment from making carbon monoxide. Worth noting is the code that says " We need to be further than 10' from our combustion air ducts to a dryer vent ".

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