I put in a supervent chimney in January and it has been great. I went with 8 and had to use 4 sections @ $95 a section bought at medards and had a local contractor install it for $200 cash. It ended up being under $800 with installation after buying the sections and the other connectors and black pipe.
The United States of America and its agencies and instrumentalities (also referred to as United States governmental entities) are also exempt from paying New York State sales tax on their purchases. Other states of the United States and their agencies and political subdivisions do not qualify for sales tax exemption.
A sales tax is a direct tax on consumption that many states and local governments impose when you purchase goods and services. The amount of tax you pay is typically figured as a percentage of the sale price. As of 2015, 45 states and an array of counties and cities charge a sales tax. As of 2015, five states, Alaska, Delaware, Montana, New Hampshire and Oregon, do not have a sales tax.