Honest question: Do you actually know how old your heater is? Not a...

Honest question: Do you actually know how old your heater is? Not a guess. Not "it came with the house." The actual year it was manufactured. If the answer is "I have no idea," you'll want to read this. (I'll wait if you want to go check the little metal plate on the unit—go ahead.) ...Back? Okay, here's the thing nobody ever tells you: that big metal box in your basement, attic, or closet is the single most expensive appliance you own. And just like your car or your fridge, it has an expiration

Honest question: Do you actually know how old your heater is? Not a guess. Not "it came with the house." The actual year it was manufactured. If the answer is "I have no idea," you'll want to read this. (I'll wait if you want to go check the little metal plate on the unit—go ahead.) ...Back? Okay, here's the thing nobody ever tells you: that big metal box in your basement, attic, or closet is the single most expensive appliance you own. And just like your car or your fridge, it has an expiration