The Mess That Is My Underground Duct Work

Swamp cooler duct work 3

This was only the second summer I’ve lived in this house, and the second year I’ve ran the swamp cooler. I thought I was lucky to have a swamp cooler that sets on the ground instead of the roof. I expect to have some dirt get through the ducting, but i had quite a bit of it all summer long this year. I also found that the cooled air was making it out our under the concrete pad that the cooler is setting on. Summer is over, so i pulled off the swamp cooler to take a look. I found a huge mess.

The metal duct work is mostly rusted away. I would expect that the ducting would be incased in concrete, which it appears there was an attempt to do so. Except only 50% of the ducting had concrete surrounding it, the rest was up against dirt. Damp dirt, which led to the rusting and the mud which penetrated the ducting.

I pulled up the majority of rusted mess out. I allowed the pit to dry out then vacuumed up as much of the dirt with a shop vac as I could. I also found a layer of dirt in the 18 inch duct that leads to the main distribution center under the forced air heater. Thankfully that where the dirt stops.

Temporary sealing of duct work for winter

I’ve got a huge mess to clean up. I’m going to need to talk to a HVAC contractor to see what can be done. Hopefully I can do most of it myself, but I will need some advice. I decided not to deal with it this fall, instead I sealed up the main 18 duct so the heated air wont get out this summer. I took a piece of foam and a piece of plywood, sized up to the wall where the inlet to the house is, and held them with some 2×4’s that I hammered into place.The foam compresses and seems to have a good seal. I filled any other holes with pieces of foam and some expanding foam.

If your interested in following the progress, you can view pictures at a flickr set.

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