We believe that a well informed customer will always have a more gratifying experience. So in that regard, here is the 10 minute ‘expert’ course in airflow. What we won’t discuss for now are the human engineering aspects. Thermal comfort is a complex science.<\/p>\n
What is CFM?<\/p>\n
You see the numbers everywhere, what does it mean? CFM stands for cubic foot per minute. This term is used as a measurement of airflow rate for ventilation systems. The cubic foot refers to a cube of air 1 foot x 1 foot x 1 foot. CFM represents a volume flow rate, since we measure how many cubic feet are flowing by per minute.<\/p>\n
Air is really, really light.<\/p>\n
It takes 13.5 cubic feet (101 gallons) of air to weigh 1 pound. For a 2,000 square foot house, that means all the air in that house weighs 1,185 pounds – not much. Warming or cooling air is \u201clow calorie\u201d. To warm all that air in your house up from 50 degrees F to 70 degrees F takes about 5,688 BTU\u2019s. The smallest house furnace puts out 40,000 BTU\u2019s per hour. So how come it takes so long to heat up the house on a cold morning? (hint: you’re not just warming the air) An unsealed door jamb, leaking 50 CFM, would over the course of 24 hours, leak out 72,000 cubic feet of air \u2013 not \u201clow calorie.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"
We believe that a well informed customer will always have a more gratifying experience. So in that regard, here is the 10 minute ‘expert’ course in airflow. What we won’t discuss for now are the human engineering aspects. Thermal comfort is a complex science. What is CFM? You see the numbers everywhere, what does it […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[42,43,39],"class_list":["post-70","post","type-post","status-publish","format-standard","hentry","category-did-you-know","tag-air","tag-btu","tag-cfm"],"_links":{"self":[{"href":"https:\/\/www.hvacquick.com\/blog\/wp-json\/wp\/v2\/posts\/70","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hvacquick.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hvacquick.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hvacquick.com\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hvacquick.com\/blog\/wp-json\/wp\/v2\/comments?post=70"}],"version-history":[{"count":2,"href":"https:\/\/www.hvacquick.com\/blog\/wp-json\/wp\/v2\/posts\/70\/revisions"}],"predecessor-version":[{"id":90,"href":"https:\/\/www.hvacquick.com\/blog\/wp-json\/wp\/v2\/posts\/70\/revisions\/90"}],"wp:attachment":[{"href":"https:\/\/www.hvacquick.com\/blog\/wp-json\/wp\/v2\/media?parent=70"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hvacquick.com\/blog\/wp-json\/wp\/v2\/categories?post=70"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hvacquick.com\/blog\/wp-json\/wp\/v2\/tags?post=70"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}