The installation of a high-efficiency boiler may require the installation of a new chimney liner.

Answer: True
Explanation: Most are direct vent, sometimes a liner is required per site conditions.

Answer: True
Explanation: Some chimney at to big for modern day gas appliance's so you will need a liner to get it to draft properly and safely.

Answer: False
Explanation: High effecient equipment is now normally a condensing cumbustion system and will need to be vented with PVC pipe. Where you may use the old chimney as a chase I prefer to run a didicated flue, sometimes horizontally.

Answer: False
Explanation: Higher efficient boilers are now 95% and higher and vent using PVC. No longer needing a chimney, but can be vented out the side wall of the house.

Answer: True
Explanation: chimney liner or even a new flue pipe made of PVC

Answer: True
Explanation: In many cases a new chimney liner is needed because of brittle and decaying chimneys.

Answer: True
Explanation: yes

Answer: True
Explanation: Have to consider condition of liner and what the equipment is calling for. Low flue temps on the high efficiency can cause problems.

Answer: True
Explanation: Because more of the heat is being absorbed by the boiler and less wasted up the chimney, the higher efficiency the gas appliance the greater chance that it will condense in the chimney as it meets the cold air. This becomes a big problem for clay lined chimneys, as it will damage them over a period of time. Typically the chimney is lined or the appliance is direct vented outside and the existing chimney is not used.

Answer: True
Explanation: smaller vent

Answer: True
Explanation: This will ensure that the area is properly ventilated.