Furnace Filter Ratings Merv

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.

Furnace filter ratings merv.

This value is helpful in comparing the performance of different filters the rating is derived from a test m. Use this rating system compare filters made by different manufacturers. A low merv rating means that the filter does not remove as many particulates from the air. Merv ratings range from 1 16.

This rating system reports how well the filter captures and holds. The range is from 1 lowest efficiency to 20 highest efficiency. This is an industry standard rating system. Merv stands for minimum efficiency reporting value.

Merv stands for minimum efficiency reporting value which is a rating system designed by the american society of heating refrigerating and air conditioning engineers. Conversely a high merv rating indicates that the filter does a good job of removing particulates from the air. 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. The american society of heating refrigerating and air.

In general filters with a rating of merv 16 or below are considered to be hvac system grade filters for residential commercial and general hospital use. The higher the merv rating on a filter the fewer dust particles and other contaminants can pass through it. A merv rating chart shows a numerical value. Merv 5 to 7.

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. 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. 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.

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. Ranging from 1 to 20 the larger the number the better the filter is at catching small. 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.