Stroho Facts

What is MERV? Minimum efficiency reporting value

Minimum efficiency reporting value, commonly known as MERV rating, is a measurement scale designed in 1987 by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) to rate the effectiveness of air filters. The scale "represents a quantum leap in the precision and accuracy of air-cleaner ratings" and allows for improved health, reduced cost and energy efficiency in heating, ventilation and air conditioning (HVAC) design. Filters of MERV 8 to 13 are effective at removing allergens for residential use, with lower associated system and operating costs.

Higher MERV ratings correspond to a greater percentage of particles captured on each pass.

Below is a table grouping MERV ratings by particle size:

MERV Min. particle size Typical controlled contaminant Typical Application
8 10.0–3.0 μm Mold, spores, dust mite debris, cat and dog dander, hair spray, fabric protector, dusting aids, pudding mix Better residential. General commercial, industrial workspaces.
11 3.0–1.0 μm Legionella, Humidifier dust, Lead dust, Milled flour, Auto emission particulates, Nebulizer droplets Superior residential. Better commercial.
13 1.0–0.3 μm Bacteria, droplet nuclei (sneeze), cooking oil, most smoke and insecticide dust, most face powder, most paint pigments If someone in your family suffers from breathing problems, asthma, allergies. Superior commercial.

How Stroho helps reduce my carbon footprint?

  • Changing your HVAC system filter helps it run more efficiently, which consumes less energy and cut unit maintenance costs. Changing dirty air filters can save 350 pounds of carbon dioxide per year.
  • By delivering filters to your home, Stroho reconfigured its supply chain and logistics to help reduce your carbon footprint as well as the carbon footprint of our shipping partners.