SHELBYVILLE, Ind. — Knauf Insulation and the Greenguard Environmental Institute announced that Knauf’s air-handling insulation products have been certified for superior indoor air quality (IAQ) ...

Through reverse engineering air handlers, David Monson of Armstrong Duct, Vent, Hearth and Home has developed a tried-and-true process for restoring everything from small to large air handlers. He ...

Dear Jerry: I enjoy getting tips from your informative columns. We are trying to prepare our home for comfort in our old age. This summer we had the sill plate sprayed with foam insulation, and this ...