Blower Door testing

AIrtightness testing is required for the 2012 IECC and 2015 IECC energy codes. All homes need to be tested an confirmed to have a leakage rate of <3 ACH50 . Air Changes Per hour at 50 pascals (ACH50) is determined with this equation:  

ACH50 = (CFM50 blower door reading * 60) / Volume of conditioned space

A blower door test and airsealing inspection before the sheetrock is installed is recommended if there is any doubt that the air leakage target will be met. 

Duct Testing

2012/2015 IECC CODE and the 2017 STRETCH CODE REQUIRES ONE OF THE FOLLOWING 3 OPTIONS:

  • At rough-in, air handler not installed:
    Duct Blast Test Ducts Only
    Max leakage 3 cfm per 100 sq ft. of conditioned floor area

  • At rough-in, air handler installed:
    Duct Blast Test w/ indoor unit
    Max leakage 4 cfm per 100 sq ft. of conditioned floor area

  • Post-Construction, total leakage:
    Duct, Registers, Indoor unit
    Max leakage 4 cfm per 100 sq ft. of conditioned floor area

Ventilation testing

Ventilation testing is required for all rebate programs and the 2012 and 2015 IECC energy code (Mass amendments). This simple test confirms that the ventilation system - programmable bath fan or balanced HRV/ERV system, is drawing enough air to meet the ASHRAE 62 standard.