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similar_observation t1_itbbcc7 wrote

Get into the habit of checking them twice a year. Since I live in the US, I tend to use common US holidays approximately 6 months apart. Like Easter and Halloween or Memorial Day and Thanksgiving... or Independence Day and Christmas

It's especially smart when checking before a cooking or firework holiday.

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silverbullet52 t1_itbzz6h wrote

Furnace is only used 6 months out of the year. I replace batteries in mine (and check expiry date...) at the same time I turn the furnace back on.

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