Furnace Filter Ratings Merv

For reference a typical dust particle is between 2 and 8 microns while pollen starts at 7 microns and can get up to 70 microns in size.

Furnace filter ratings merv.

This value is helpful in comparing the performance of different filters the rating is derived from a test m. While merv ratings reflect a filter s ability to trap both microscopic and macroscopic particles mpr ratings only grade a filter on its capacity to remove particles from 0 3 to 1 microns. A merv rating chart shows a numerical value. A low merv rating means that the filter does not remove as many particulates from the air.

Merv stands for minimum efficiency reporting value. Merv ratings range from 1 16. Merv stands for minimum efficiency reporting value which is a rating system designed by the american society of heating refrigerating and air conditioning engineers. The range is from 1 lowest efficiency to 20 highest efficiency.

One of the best furnace filters for cigarette smoke is the nordic pure pleated ac furnace air filter which boasts a high merv rating and rave reviews. Merv 17 through merv 20 filters are typically used in surgical operating rooms clean rooms and other contexts that require absolute cleanliness. The higher the merv rating on a filter the fewer dust particles and other contaminants can pass through it. Owen said filters in this range like this merv 7 nordic pure were created as an improvement on the basic merv 1 to 4 filters and designed to also filter out midsize particles 3.

There are a wide variety of sizes to choose from with this filter which has a merv rating of 13 the highest tier on the scale. Conversely a high merv rating indicates that the filter does a good job of removing particulates from the air. The rating indicates the size of particles the air filter is designed to capture. Merv air filter ratings range from 1 least efficient captureability to 16 very efficient.

Use this rating system compare filters made by different manufacturers. Minimum efficiency reporting values or mervs report a filter s ability to capture larger particles between 0 3 and 10 microns µm. This is an industry standard rating system. The american society of heating refrigerating and air.

This rating system reports how well the filter captures and holds. Ranging from 1 to 20 the larger the number the better the filter is at catching small. Many homes use filters with a merv rating of 1 4 which mostly filter out dust lint and pollen among other larger common particles they do very little to trap small microparticles.