What's New. . .

ASHRAE 62.2 California tool

• This tool is specifically for compliance with the California version of 62.2 included in Title 24.
• It allows the calculation of whole-building ventilation for new, existing, and multifamily dwellings.
• When working on existing dwellings, it allows for the use of the alternative compliance approach.

What's Been Updated. . .

Zone Pressure Diagnostics (ZPD) tool

• You may now enter the house-wrt-zone or the house-wrt-outdoor pressures for the Initial Zone Configuration and the Modified Zone Configuration. This makes this great tool even more useful and flexible.
• At the bottom of the tool results, we have added "Percent of whole-house leakage passing through the zone = xx%.
  
  

Advanced Infiltration tool

• Now includes a choice of methods for combining infiltration and unbalanced ventilation: select "Quadrature" or "0.5 rule.

Who Uses RED Calc Free Tools?

• Home performance analysts
• DOE weatherization energy auditors and quality-control inspectors
• Energy auditors
• HERS raters
• Design professionals
• HVAC analysts and installers
• Building inspectors
• Architects
• Engineers
• Building science researchers