Save time by getting your measurements together before a store visit. Yes, it's a drag! But so is showing up without measurements! If you are unsure, make a note of what you did measure. Also, a smartphone pic will sometimes be informative. Knowing as much as you can will benefit your selection of an appliance and feasibility of an installation.
Also, it's very important to know: is the chimney an "exterior chimney" - i.e. exposed to the outdoors on one or more sides below the roofline. Or is it an interior chimney - encased within the house's "envelope". Do you know the size of the flue tile in the chimney? __________"x__________". Has there been a stove installed in it before? Y / N
