There’s potentially a rule against it depending on who you rent from (idk w/ my current landlord corporation, would have to ask) and if they’re feeling particularly vindictive they could try to use evidence of your “unauthorized repairs” to withhold security deposit.
ymmv depending on how sneakily you can replace an air filter
Why can’t you just replace it yourself?
There’s potentially a rule against it depending on who you rent from (idk w/ my current landlord corporation, would have to ask) and if they’re feeling particularly vindictive they could try to use evidence of your “unauthorized repairs” to withhold security deposit.
ymmv depending on how sneakily you can replace an air filter