Purified vs Distilled vs Filtered Water: Which One Comes Out of Your Filter
These three words are not quality tiers of the same thing — they describe different processes with different endpoints — and the one th...
MERV 8 vs MERV 11: Which One Your HVAC Can Actually Handle
The choice between MERV 8 and MERV 11 is not an air-quality debate — it is a blower-motor question. One sentence: if your household has...
MERV Rating Chart: The Complete Printable Table (2026)
This is the one-table version of the ASHRAE 52.2 efficiency chart — every rating, all three particle-size bands, plus the MPR/FPR conve...
MERV 13 Air Filters
The Smoke and Respiratory Tier — ≥50% of 0.3–1 µm, ≥85% of 1–3 µm, ≥90% of 3–10 µm (ASHRAE 52.2)
Photo: Khanh Do / Unsplash
MER...
MERV 11 Air Filters
The Allergy Tier — the Lowest Rating That Targets Submicron Particles (≥20% of 0.3–1 µm, ASHRAE 52.2)
Photo: Andrey Matveev / Unspla...
What Is a Micron Rating in a Water Filter? (And Which One You Actually Need)
A micron rating is the size of the smallest particles a water filter is designed to capture, measured in microns (one-millionth of a me...
What Is a MERV Rating? The Complete 2026 Guide to Air Filter Efficiency
MERV stands for Minimum Efficiency Reporting Value — a 1 to 16 scale (with 17–20 reserved for HEPA-grade media) that rates how well an ...
MERV 8 Air Filters
The Everyday Workhorse Rating — ≥20% of 1–3 µm and ≥70% of 3–10 µm Particles (ASHRAE 52.2)
MERV 8 is the right filter for most h...
NSF-42 vs NSF-53 Certification: The Real Difference (And Why Your Refrigerator Filter’s Label Is Half the Story)
The short answer up front: NSF/ANSI 42 tests aesthetic effects — chlorine taste and odor, particulate class, and (when claimed) chloram...