Insulation & Filters
R-values, MERV ratings, and air quality
5 articles
Calculators
Guides & References
HEPA Filter Guide
Not even close. These labels represent wildly different levels of air filtration — and picking the wrong one means you're breathing through a marketing ...
Insulation R-Value Chart Per Inch
We hear you. Insulation R-values are scattered across dozens of manufacturer spec sheets, building codes, and half-accurate blog posts. Fiberglass batts...
MERV Rating Chart
We hear this exact question all the time — and the confusion is understandable. There are 20 MERV levels, three different rating systems (MERV vs FPR vs...
What Is R-Value and How Does Insulation Work
If you've ever shopped for insulation, read a home energy audit, or tried to figure out why one room is always freezing, you've run into R-value. The nu...