If the coil is located on the back of the zipper instead of the front it is an Invisible Zipper. Metal zippers consist of individual metal teeth. They are typically made from nickel, brass, aluminum and manganese.
Repair costs generally range from about $2000.00 to $4500.00 per flue or more! In a Real Estate transaction, you may have the opportunity to negotiate defects that are disclosed as part of the inspection process.
1 You may need a new chimney liner if youâre upgrading to higher efficiency boiler. 2  Generally, this costs about $300 to $700 for gas and $700 to $1,800 for oil. 3  Removal of the old unit can range from $300 to $1,500 or more. Generally, this costs about $300 to $700 for gas and $700 to $1,800 for oil. 2  Removal of the old unit can range from $300 to $1,500 or more. 3  Boilers rated at 95 percent efficiency or higher are eligible for a $150 federal tax credit through Energy Star.