Adjusted gross income, or AGI, is a person's total taxable income minus allowable tax deductions and personal exemptions. Taxable income includes all wages, salaries, tips, dividend and interest income and capital gains. These incomes comprise the Income portion of many IRS tax-return forms, including Form 1040A.
An H-style cap (cowl) is a chimney top constructed from chimney pipes shaped like the letter H. (Its image is included in cowl (chimney).) It is an age-old method of regulating draft in situations where prevailing winds or turbulences cause downdraft and backpuffing.
The RVK1A Broan Roof Ducting Kit is for roof ducting installation of exhaust fans with a 3 in. or 4 in. duct. The black steel roof cap features a built-in back draft damper and bird screen. Included is 8 ft. of 4 in. Dia flexible foil ducting that conforms to UL 181 Class 1 Air Connector requirements. For a 4 in.