I would add a comment on the usage amps. When the furnace runs, I think the fan uses 7-9 amps. Also, when my batteries are low, the converter draws 6 or 7 amps for a few minutes and then slowly comes down to zero (over about 30-60 minutes). So don't plug in and turn the furnace on right away.
p.s. I know this because I have the Progressive surge protector with a digital readout of the amperage.
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Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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