I want to purchase an insert for an existing fireplace and have attempted to figure out the installation requirements but am very confused after reading pages of manuals for several manufacturers. Do I need to breakopen the back of my fireplace to get outside air in for combustion? (My husband is very reluctant to do this since it is brick with stucco over it and would require a lot of cosmetic repair) Do I (actually my husband) need to drill a hole through the side of the fireplace to get electrical to the unit. We have 1.25 inches of solid granite then brick on the front part of the fireplace and have sheetrock, framing lumber, then brick on the side of the firepalce. Three sides of the fireplace are inside the house with only the back flush with the outside wall but the brick has been stuccoed, sheetrocked, or granited over.