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.
Community Q&A. Roof vents are devices that allow the moisture in a house to escape, which prevents the growth of mold and mildew. Roof vents also help to keep wood rot, which is a form of fungal decay, from developing in the house. Roof vents are made of plastic or metal, and are also known as turbine vents.