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Building Science Calculation Tools for Energy Professionals

What's New with RED

RED Calc Pro Web App Released Soon!

We have been working long hours to bring RED Calc Pro to your computer, tablet, and smartphone. As of April 1, 2019, the RED Calc Free web application is going through beta testing for the second time. RED will be exhibiting at the Home Performance Coalition Conference in Chicago April 1st through April 4th in Chicago. Visit us at booth 705 to try RED Calc Pro and view our new website.

Here is a screenshot of the ASHRAE 62.2-2016 RED Calc Pro tool: 


Sign up for our RED newsletters and watch for RED Calc Pro progress updates and features.

RED and HeatSpring Offer Courses

Rick Karg of RED is presenting online courses through HeatSpring. Currently, two courses are available. 

ASHRAE 62.2 Ventilation for Single-Family Dwellings will be offered for the 11th time starting September 16 through October 27, 2019. Students have access to Rick for six weeks and access to the course materials for 12 months. 

Zone Pressure Diagnostics: Precise Leak Detection and Measurement in Buildings is offered at any time, without direct access to Rick.

Both courses feature RED Calc Free tools.

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

Cost to Operate Ventilation

RED worked with AirCycler and Panasonic to publish two estimating tools for determining the annual cost to operate ventilation systems (RED engineered and authored all the calculations). Each web application includes eight options, from exhaust-only to heat recovery ventilation. The low cost of operation might surprise you. Please give the AirCycler app a try:  

AirCycler Annual Ventilation Cost Calculator

Because of the override options, these web applications will give you the annual ventilation cost you need for almost all available ventilation options. Each app includes a Background and Assumptions document link. As far as we know, there are no other apps available for these estimates.

Comparison of RED Calc Free 
and 
RED Calc Pro

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