Could an 80% gas furnace pull radon into the home?
I own a 1930 duplex in Portland, OR and am starting to do gradual updates. The first thing I will be doing is decommissioning the in ground oil tanks and installing gas furnaces. I am trying to choose whether to do 80% furnaces or 90% furnaces and am weighing the following thoughts:
1 – There is a radon mitigation system under the basement slab and a couple of cracks in the slab. Since an 80% furnace would use atmospheric combustion would it be able to depressurize the building enough to potentially bring radon into the basement? The original radon test, I believe, was done in the summer when the current furnace would not have been running.
2 - In "All About Furnaces and Duct Systems" posted by Martin Holladay on 1/24/14, Martin talks about low thermostat set points leading to corrosion of the heat exchangers in condensing furnaces. Since these furnaces will be in rentals and I won’t be able to control the thermostats, I’m hesitant to put in condensing units due to the potential added maintenance/replacement.
Are these real reasons for concerns? I would appreciate any input that folks would have.
Posted Tue, 02/18/2014 - 16:10
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