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Minimum Efficiency Reporting Value, commonly known as MERV, is a measurement scale designed in 1987 by the American Society of Heating, Refrigerating and Air-Conditioning Engineers ( ASHRAE) to report the effectiveness of air filters in more detail than other ratings. For example, often a high-efficiency particulate air ( HEPA) filter is ...
A furnace ( American English ), referred to as a heater or boiler in British English, is an appliance used to generate heat for all or part of a building. Furnaces are mostly used as a major component of a central heating system. Furnaces are permanently installed to provide heat to an interior space through intermediary fluid movement, which ...
The NIOSH air filtration rating is the U.S. National Institute for Occupational Safety and Health (NIOSH)'s classification of filtering respirators. The ratings describe the ability of the device to protect the wearer from solid and liquid particulates in the air. The certification and approval process for respiratory protective devices is ...
The energy efficiency ratio (EER) of a particular cooling device is the ratio of output cooling energy (in BTUs) to input electrical energy (in watt-hours) at a given operating point. EER is generally calculated using a 95 °F (35 °C) outside temperature and an inside (actually return-air) temperature of 80 °F (27 °C) and 50% relative humidity.
The stock jumped 67% before settling down around 30% up on Monday’s price. “VW’s investments in Rivian will prove valuable in helping it achieve the scale necessary to get to positive free ...
From January 1, 2021, to December 31, 2023, the FDA received over 300 adverse event reports involving children and adults who consumed delta-8 THC products, prompting the agency to issue a warning ...
Last Updated: Tuesday, Dec. 30, 2014, 5:40 am EST. The Huffington Post has updated Hospice Check to reflect current inspection data. Since we first published this map in June, the number of hospices that haven’t been inspected in more than six years fell below 400, from 759. The average time since last inspection also fell, from 3 ½ years to ...
An electric arc furnace ( EAF) is a furnace that heats material by means of an electric arc . Industrial arc furnaces range in size from small units of approximately one-tonne capacity (used in foundries for producing cast iron products) up to about 400-tonne units used for secondary steelmaking. Arc furnaces used in research laboratories and ...
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