Built-in NFVA Calculator

  • Saves Time
  • Improve Job Quality

Don’t put your customer’s warranty at risk

With InstaBid’s built-in NFVA calculator, any user can calculate the intake and exhaust needed for proper ventilation in under two minutes.

  • Easy to use
  • Input the current intake, and InstaBid will calculate what you need
  • Give your homeowner the best ventilation possible with little effort
  • Protect your company from future warranty problems

Saves Time
NFVA is one of the most commonly ignored aspects of proper roof component installations. Mainly, because memorizing each components NFVA rating combined with balancing intake and exhaust. InstaBid knows each components NFVA rating and will quickly recommend the items and quantities needed to obtain the proper balance.

Improves Job Quality
With InstaBid, a proper balanced roof is easy. If you are out of spec in either intake or exhaust, InstaBid will notify you so you can offer a longer lasting, quality roof for your homeowner.


Calculating the proper NFVA for a home is not for the faint of heart. Let InstaBid do the heavy lifting. Calculating a proper NFVA ratio is easy as pie with InstaBid’s built-in calculator.

Just do the following:

  • Input the home’s current intake ventilation
  • Input the home’s current exhaust (error notification will alert you to any incompatibilities)
  • InstaBid will recommend how many intake vents are needed
  • If using ridge vent, InstaBid will recommend how many linear feet of ridge vent are needed
  • If using other exhaust ventilation, InstaBid will recommend how many units are needed

That’s it, you’re finished! All required products will output to your materials order list and your installer notes.

Save lots of time and improve your job quality with minimal effort!


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