Who Writes This Site

Air in the House is a plain-language reference on home ventilation and indoor air in US homes, taken room by room. It explains why air moves the way it does in a house, then what a homeowner can reasonably do about it.

The pages are grouped the way you'd walk through a house:

• The kitchen: range hoods, gas stoves and makeup air.
• The bathroom: exhaust fan size, run time and venting.
• The whole house: why tight homes need fresh air, the main ventilation systems, ERVs and HRVs, and attached garages.
• Humidity: winter levels, window condensation and humidifiers.
• Filters and air cleaners: MERV ratings, portable cleaner sizing, ozone and ionizer warnings, wildfire smoke and air quality monitors.
• Radon: testing, reading a result and how mitigation works.

Every page is written by the Air in the House editors. The byline on each page says so; there are no named authors, and no page is written in the voice of a contractor or a reviewer.

Pages start from primary sources, not from other websites' summaries. The usual ones are the US Environmental Protection Agency, the Department of Energy, ENERGY STAR, the Consumer Product Safety Commission (CPSC), the International Residential Code, the Home Ventilating Institute, the Association of Home Appliance Manufacturers, the California Air Resources Board and the makers' own installation and owner's manuals.

A few habits run through every page:

• Figures are sourced and dated. Each number traces back to the agency, standard or manual that published it, and the page links that source next to the claim where it can. Sources were read in October 2026 unless a page says otherwise.
• Where sources disagree, the page says so. For example, a trade group's rule of thumb and a building code minimum are named separately rather than blended into one number.
• Codes are treated as local. Code sections change by edition and by what your town adopts, so pages point you to your building department instead of promising what applies to your house.
• Each page has a method note. Near the end of every article, a short note lists what the page is based on and what was deliberately left out, such as product rankings or prices.
• Safety comes first. Pages say plainly when a job belongs to a licensed electrician, a roofer, an HVAC contractor or a certified radon professional.

When a figure changes at its source, the page is updated and the date on the byline changes with it.

Air in the House is not an HVAC contractor, an electrician, a radon tester or a radon mitigator. It installs nothing, repairs nothing and tests nothing, in your home or anyone else's.

It also doesn't sell anything directly, doesn't review or rank products, and doesn't accept payment to mention a business or product. Some pages link to stores that share owners with this site and to a service company that works with it; who owns this site lists every one and explains how those links are marked.

Air in the House has no connection to any business that may have used this web address before. If you are looking for a heating company, a local contractor listing or your state's licensing board is the place to start.

For what the site does and doesn't collect when you read it, see what this site collects. For who made the photographs and pictures, see image credits.