How often do you replace your equipment?

[MuicyJelon]

How often do you replace your equipment? Thermometers, Hygrometers.


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[Quarks]

I would love to know this also. From what I've seen on amazon and elsewhere, the Jumpstart and Century Thermostats fail after 2-5ish (?) years, so they have to be monitored and replaced regularly, unlike a herpstat...