Furnace Filter Ratings Merv

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.

Furnace filter ratings merv.

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

Merv ratings range from 1 16. Merv air filter ratings range from 1 least efficient captureability to 16 very efficient. This rating system reports how well the filter captures and holds. 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.

The rating indicates the size of particles the air filter is designed to capture. 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. 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. This value is helpful in comparing the performance of different filters the rating is derived from a test m.

Merv stands for minimum efficiency reporting value which is a rating system designed by the american society of heating refrigerating and air conditioning engineers. Merv 17 through merv 20 filters are typically used in surgical operating rooms clean rooms and other contexts that require absolute cleanliness. 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. Merv stands for minimum efficiency reporting value.

Conversely a high merv rating indicates that the filter does a good job of removing particulates from the air. A merv rating chart shows a numerical value. The higher the merv rating on a filter the fewer dust particles and other contaminants can pass through it. The range is from 1 lowest efficiency to 20 highest efficiency.

A low merv rating means that the filter does not remove as many particulates from the 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. Merv 5 to 7.