MERV filter rating system

A) Compares the airflow resistance of different filters when fully loaded
B) Compares the arrestance value of 12 different ranges of particle size
C) Compares the airflow resistance of different filters when they are new
D) Compares the overall arrestance value of all sizes of particles


B

Trades & Technology

You might also like to view...

The most common method of cooling standby generator sets is _____.

a. a mounted radiator with an engine-driven fan b. liquid-to-liquid heat exchangers c. battery-powered systems d. compressed air systems

Trades & Technology

Describe the purpose of LIC-300, and how it works.

What will be an ideal response?

Trades & Technology

____ days can be seen as the average difference between inside and outside temperatures over the course of a day.

A. Average temperature B. Heating degree C. Average degree D. Cooling degree

Trades & Technology

How can the windings ratio be safely determined for an unmarked transformer?

A) The turns ratio is the same as the ratio of primary resistance to secondary resistance ratio. B) Apply known low voltage ac to the primary and measure the secondary output. The ratio of the voltages is the same as the windings ratio. C) Standardized wire color codes indicate windings ratio. D) either A or C

Trades & Technology