Your guidance will be greatly appreciated.
Answer: First of all, who said you could not use the fireplace, and why? Was it the same person who provided the fireplace-sleeve estimate? Did you get a second opinion?
The estimate is about correct. For several years, I've been asking real estate agents and remodelers who handle older homes with flues lined with tiles or pargeted with mortar about the cost of installing stainless-steel sleeves, and the answer has always come back "about $4,000."
Would it be a good idea to spend the money on the sleeve? It depends on how long you are going to live in your house. If you plan to move in a few years, be advised that today's buyers want everything in perfect condition, and that a nonworking fireplace could kill a deal.
Metal sleeves are the easiest to install, certainly more so than tiles in an existing chimney. Poured-in cement liners - cast in place - are an option, too, and last about 50 years. I'm not sure of the price.
The Hearth, Patio and Barbecue Association says a fireplace insert needs to be placed in an existing masonry or factory-built fireplace with a working chimney. A fireplace insert is either vented through a working chimney, direct vented, or vent-free, depending on fuel choice.
In most cases, a chimney liner is required. The type and size is specific to the fuel.
Vent-less gas inserts or logs come with carbon monoxide and oxygen-depletion sensors that automatically shut off if there is an operation problem.
Some municipalities have rules against vent-less fireplaces, though, so you will need to check with the building department before you proceed.
Older fireplaces lose a lot of heat. The association rates older fireplaces' efficiency at 5 percent to 10 percent.
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