The HTRC

The Homeowners & Trades Resource Center

Brought to you by:

You are here: Home / Glossary Terms / NFVA

NFVA

NFVA or Net Free Ventilation Area is used to describe the total amount of space unobstructed by screens, louvers, or other material. In some cases it will be listed as a total for entire assembly like a gable vent or how much per linear feet for items like a ridge or soffit venting. In order to calculate the required amount, one must refer to the codes adopted in their jurisdiction. By far the most common calculation is either 1/150 or 1/300 depending on conditions.

  •  Tweet
  •  
  •  
  •  
  •  
  •  

November 21, 2012 By SLS

Featured Posts

January - Mid Winter Maintenance Checklist

Welcome to the start of a New Year, and the first full month of winter. This is the time of the year when many individuals try to wipe the slate ...

Read More

Preventing or fixing frozen water pipes

Updated: This article was originally posted in early 2010 after the Alabama Department of Health issued the following warning via press release: Prolonged period of cold weather ahead prompts warnings to ...

Read More

BS4D: Saving on Heating Related Energy Costs

For the bulk of the year, energy costs are not a big concern to many and instead most calls relate to comfort, safety or health issues. We are now starting ...

Read More

FAQ - Do I need storm doors or windows?

As the weather starts turning colder many start wondering - should I replace my windows, get a storm door, install storm windows, or??? Shoot I live in an area governed ...

Read More

Common Sense Building: Build Radon Out

Common Sense Building: Build Radon Out

As many of you probably already know, January is National Radon Month. Just like CO, it is an odorless & tasteless gas; however, unlike CO there are no warning signs ...

Read More

FAQ: Ceiling fan direction - summer & winter

One of the biggest questions out there is which direction should my fan be running and how can I tell. You look at the switch and realize it isn't any ...

Read More

FAQ on Duct Cleaning: All Hype or Worthy Expense?

It must be spring time... I got the following in the mail just the other day: 5 different ads all for duct cleaning. With allergy season starting along with my ...

Read More

Random Glossary term

  • ICF

    NFVA or Net Free Ventilation Area is used to describe the total amount of space unobstructed by screens, louvers, or other material. In some cases it will be listed as a total for entire assembly like a gable vent or how much per linear feet for items like a ridge or soffit venting. In order to calculate the […]

The HTRC - Copyright © 2006–2021 by TheHTRC.com & SLS Construction & Building Solutions LLC http://SLS-Construction.com