Radon if your fridge saved $45 a year in ten years it would save you $450, not tooo pressed to recoup the cost.
If looked at strictly from a investment point of view it is a good investment, Keeping the cost down is paramount for a reasonably fast pay back, Finding supplies at a cut rate, free or slightly used prices is the way to go. Re- building supply stores craig's list or the like.
My investment is going to arrive back in my pocket fast, after that it will be making me money every year.
I payed $15 for $200 worth of flooring insulation and $30 for 2 cans of 3M spray glue.
$45 total costs pay back time a year or so then money in my pocket.
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