Should a chimney liner be insulated?

Answer: In some cases
Explanation: Chimney liner insulation is required or strongly recommended in some installations, depending on the liner system, chimney construction, clearances to combustible materials, fuel type, and manufacturer requirements. Proper insulation can help maintain flue temperatures, improve draft, reduce condensation, and help the liner meet its listed safety requirements. The chimney and liner system should be evaluated before determining whether insulation is needed.

Answer: In some cases
Explanation: Fireplace inserts do not need to be insulated. Free standing wood stoves and furnaces do need insulation to be up to code. We have been installing wood burning systems to be up to Oregon code since July 1979. When Oregon started all installations to be up to code. Everyone has a better idea, but codes make it safe.

Answer: In most cases
Explanation: In most cases, it is recommended to insulate a chimney liner. Insulation helps improve efficiency, reduces condensation, and enhances safety. It keeps the gases warmer, preventing buildup and protecting the chimney. However, consult Fort Worth Chimney Sweeps to determine the best solution for your heating system.

Answer: No, never
Explanation: I never heard of it ever...

Answer: Yes, always
Explanation: It will make it work better.

Answer: Yes, always
Explanation: two hold high heat

Answer: In most cases
Explanation: Chimney liner installations range from insanely simple... measure, cut, drop, connect, to damn near impossible. The latter is where experience comes in. As far as insulating, it's not that hard at all. If I was going through the trouble of dropping a liner myself, I would take the time to insulate it w/wrap. (IF you have enough clearance in the existing flue, w/no obstructions.) As usual make sure your in code and all that other important safety stuff.