Frequently Asked Questions (FAQ)

RED Calc Pro

  • What browsers and devices are supported by RED Calc Pro tool?
    Supported Browsers and Devices (as of September 2019)

      •  Chrome
        • Desktop/laptop for the latest version
        • Mobile for Android (v4.4+)
        • Not supported for iOS (iPhone and iPad)
      • Safari
        • Mac: 11.1+
        • Mobile for iOS iPhone and iPad: iOS 12+
        • Safari not supported for PCs
      • Firefox
        • Desktop/laptop: Latest version
      • Opera
        • Desktop/laptop: Latest version
      • Internet Explorer
        • Not supported, with no intention to support
      • Edge
        • Desktop/laptop for version 80 and higher
        • Mobile for Android (v4.4+)
        • Not supported for iOS (iPhone and iPad)
      • Lumia
        • Not supported (Windows phone)

    You may perform a real-time compatibility test between your browser/device and RED Calc Pro.
  • Is the RED Calc Pro web app mobile friendly?
    Yes, the RED Calc Pro app will run effectively on devices of any screen size with an approved browser. Below is a screenshot of the RED Calc Pro ASHRAE 62.2-2016 tool on iPhone.

  • Does Math-on-the-fly work for RED Calc Pro tools?
    Yes, it does. You may perform basic mathematical operations in most input boxes, including addition (+), subtraction (-), multiplication (*), and division (/). You may also use parenthesis (  ) as part of your operations. The screenshot below shows math-on-the-fly turned on for the highlighted input, Floor area. When you click outside of the input box, the result of the math operations is displayed, in this example, 2000 square feet.
  • How do the features of RED Calc Pro and RED Calc Free compare?
  • Can I print save and print reports for RED Calc Pro tools?
    Yes, your tools reports are saved and you can download or print them as PDF files. You can also create a default header and/or footer for all your tool reports and/or create individual headers and footers of tools. Below is a screenshot of the ASHRAE 62.2-2016 too showing a custom header. This PDF can be downloaded and saved and printed.

  • Does RED Calc Pro work if I don’t have an internet connection out in the field?
    Yes, the web app does work seamlessly without an internet connection. When you have a connection again, all your work will be synced and saved to the RED Cloud. We have even built-in Offline Data Recovery if you happen to access your RED Calc Pro account from another device when you still have offline data stored on the first device. We’ve got you covered! Notice the RED Cloud icon in the upper right section of the RED Calc Pro screen below on a smartphone. This RED Cloud icon always gives you the status of your internet connection and whether data is being transferred to or from the Cloud.    
  • Can I lock a tool or folder to guard against mistakenly changing something?
    Yes, you can lock a folder or a tool by clicking on the open-lock icon to the right of each folder or tool. If you lock a folder, all the tools in that folder will be locked, also. If you attempt to alter an input value in a locked tool, a closed-lock icon will flash in the input box to remind you it is locked. In order to unlock a folder or tool, click on the closed-lock icon. 

RED Calc Pro Subscriptions

  • As a Team Owner, may I be a member of my team with rights to use RED Calc Pro?
    Yes, when you purchase your team seats (subscriptions), you will be asked if you wish to take up a seat or not. At this time you can check the corresponding checkbox to take up a seat. If you do not wish to take up a seat, do not check this box. You can then assign the seat to someone else.  
  • Can team owners change the name of their team?
    Yes – team owners can change the name of their team from My Account > Teams > Team Settings.  
  • If a member of my team stops working for me, may I assign a different staff member to replace her?
    Yes, you may. When you purchase a team subscription, you sign up for a certain number of seats. For any reason, you may remove someone from your team and replace them with someone else. You do this by logging in to your account and navigating to Teams on your My Account dashboard. See the screenshot below of a team owner/manager dashboard with Teams highlighted. After clicking on the Teams option, you will see a new page with a choice for Members. Navigate to Members where you have the option of removing a team member. After removing a member, navigate to the Add Member page. Here you can add a team member by Registration Link or an Email Invitation.
  • May I increase the number of seats I am subscribed to?
    You may increase the number of seats included in your subscription at any time. Login to your account and go to Teams on your My Account dashboard. See the screenshot below of a team owner/manager dashboard with Teams highlighted.

  • Will team members get renewal emails for their membership subscriptions?
    No – individual team members won’t get their own renewal or expiration emails because they can’t act upon them. The team owner alone is responsible for managing billing and renewals, so they will receive all renewal and expiration emails.
  • What happens if the team owner stops the team subscription?
    For teams, changes in the subscription status are inherited by all members of the team. If the subscription is paused, all team memberships are paused. If the subscription is canceled, all team memberships are canceled as well.    
  • If there are individuals with RED Calc Pro subscriptions at my organization already, is it possible to include these individuals as part of my team subscription?
    Yes, you can absorb existing individual RED Calc Pro subscriptions into your new or existing team subscription. Contact RED for assistance with these account transfers.  
  • Must I purchase RED Calc Pro with a credit card?
    We will consider your purchase without a credit card, but we cannot ensure we will be able to do this. Please contact us with your request; we will get back to you quickly. Please use our Contact-Us form for your request.

RED Calc Free

  • Will RED continue to support RED Calc Free tools after RED Calc Pro is released?

    Yes. Not only will we support RED Calc Free, but we will update tools and add more in the future.

  • How do I find the Popup Help dialogue for each input or result label in all RED Calc Free and RED Calc Pro Tools?

    Click (touch) the input or result label on the tool to see the content-sensitive help for that label. The screenshot below shows Popup Help for a RED Calc Pro tool. It works the same for RED Calc Free tools.

  • Will the RED Calc Free tools work when I am offline?
    No, but the RED Calc Pro tools are designed to work when you are offline.

  • I am required to login to use RED Calc Free tools?
    No. However, if you are a subscriber to the RED Calc Pro tools web applications, you must log in to use it.

  • Is it possible to save my files when using RED Calc Free?
    No, you may not save files; you must subscribe to the RED Calc Pro tools web app for this feature. However, for RED Calc Free, you can take a screenshot of the filled-in tool and save it as a file somewhere or print a hard copy.

  • Does Math-on-the-fly work on the RED Calc Free tools?
    Yes, it does. This feature is also part of RED Calc Pro tools. You may perform basic mathematical operations in most input boxes, including addition (+), subtraction (-), multiplication (*), and division (/). You may also use parenthesis (  ) as part of your operations.

ASHRAE 62.2 Standard

  • How is the height of a dwelling measured?
    The vertical distance between the lowest and highest above-grade points within the dwelling pressure boundary. This height should include the above-grade part of a basement if the basement is within the pressure envelope. Do not include an attic if it is not within the pressure envelope.

  • May I claim an infiltration credit for multifamily dwelling units?

    For ASHRAE 62.2-2016 you may claim an infiltration credit for horizontally attached dwelling units in a multifamily building, but not for dwelling units that are one above the other (stacked). For ASHRAE 62.2 versions before 2016, you may not claim an infiltration credit for ANY dwelling unit in a multifamily building.

    The horizontally attached infiltration credit is a partial credit based on the ratio of the area of the exterior surfaces NOT connected to other dwelling units to the total surface area. For example, if the exterior surface area not connected to other dwelling units is 2400 square feet and the surface area common to the adjacent unit(s) is 600 square feet, the total surface area is 3000 square feet. So you may claim 80% of the full infiltration credit (2400/3000 = 0.8). If the blower door test result for this horizontally attached dwelling unit it 1600 CFM50, the allowed credit is 1600 x 0.8 = 1280 CFM50.

  • How often is the ASHRAE 62.2 Standard officially updated?

    The 62.2 Standard is updated every three years. It was first published in 2003, then in 2004, 2007, 2010, 2013, 2016, 2019, and 2022. Intermittent versions are sometimes published by ASHRAE between the years of the full edition.

  • What is the official title of the ASHRAE 62.2 Standard?
    The full title of the Standard is Ventilation and Acceptable Indoor Air Quality in Residential Buildings. The Standard covers single-family detached dwellings, manufactured homes, and multifamily buildings of any size (dwelling units only; ASHRAE 62.1 covers the non-dwelling spaces in multifamily buildings). The ASHRAE 62.2 Standard is available for purchase at the ASHRAE website. It may also be read free-of-charge at the ASHRAE website.

  • What types of mechanical ventilation are required by the ASHRAE 62.2 Standard?

    The types of mechanical ventilation include:

    • Local ventilation is intended to exhaust airborne contaminants at their source.
      • Full bathrooms
        • 50 CFM (25 L/s) for demand-controlled exhaust.
        • 20 CFM (10 L/s) exhaust if operated continuously.
      • Kitchens
        • 100 CFM (50 L/s) demand-controlled exhaust if the range hood is installed directly over a range, or 300 CFM (150 L/s) if not directly over the range.
        • 5 air changes per hour continuous exhaust ventilation if the kitchen is “enclosed”. An enclosed kitchen is defined as a kitchen whose permanent openings to interior adjacent spaces do not exceed a total of 60 square feet (6 square meters).
    • Dwelling-unit ventilation is intended to serve as dilution ventilation. In older versions of ASHRAE 62.2, this is termed “whole-house” or “whole-building” ventilation.
      • The CFM (L/s) minimum requirement is based on 1) the area of the living area and the number of occupants (bedrooms).
        • The minimum requirement for fresh outdoor air is supplied by natural air leakage (infiltration) and mechanical ventilation (exhaust, supply, or balanced).
  • If I install a balanced ventilation system, sometimes referred to as a Heat Recovery Ventilation (HRV) or Energy Recovery Ventilation (ERV), may I add the exhaust airflow and supply airflow together for compliance with the ASHRAE 62.2 Standard?
    No, the exhaust and supply airflows are not added together. For example, if the minimum dwelling-unit ventilation requirement if 100 CFM (50 L/s), the balanced ventilation system must supply 100 CFM (50 L/s) and exhaust 100 CFM (50 L/s).