I’m looking to buy my first wood insert to increase the efficiency of my fireplace in the basement. I have a pellet stove upstairs of my split-level, but it doesn’t warm my family room and office downstairs. Another question – how much attention does it requires (open/close damper?)? Is it safe to leave it on overnight? I would appreciate any guidance on the brands, features, etc and pardon my ignorance . I try to find something inexpensive - best value for $.