# Mean HVAC BS Tools — A Toolkit By Mean HVAC > HVAC engineering toolkit with psychrometric, duct, and insulation calculators. (iPhone/iPad app by Mean HVAC Consulting & Design LLC.) - Source: https://appshunter.io/ios/app/mean-hvac-bs-tools/id6621189879 (this page in markdown: same URL + `.md`) - Developer: [Mean HVAC Consulting & Design LLC](https://appshunter.io/developer/1761936254) - Category: Utilities, Productivity - Price: Free (on sale, was $7.19) - Rating: 5.00/5 from 3 App Store ratings · 3 written reviews indexed - Age rating: 4+ - Requires: iOS 15.1 · 54 MB - Languages: American English - Released: 2024-08-19 - Data updated: 2026-08-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/mean-hvac-bs-tools/id6621189879/reviews.md ## What is Mean HVAC BS Tools? BS Tools is a toolkit of calculators designed for HVAC and other Building Science (BS) applications, as an alternative to more tedious, manual methods. UTILITIES Single Point Psychrometrics: This calculator provides psychrometric properties of air at a glance. It's great for changing humidity units. Mixed Air Psychrometrics: This calculator provides psychrometric properties of the resulting air of two mixed air streams, e.g. ventilation air mixed with return air. Duct Calculator: In a word, it's a classic 'ductulator'. This tool accepts any two choice inputs among CFM (Air Flow Volume), Duct Diameter, Friction Rate (Head Loss), and Air Velocity. This utility will then provide the other two parameters for you. Uses either a round diameter, or rectangular dimensions. Smallest Zone Calculator: This calculator can be used to gauge how much excess air is acceptable in a heating or cooling system. Bypass Calculator: Paired with the Smallest Zone Calculator, this can tell you how much air you can bypass. Values are unique for cooling and heating (adjustable for altitude). IR Wall Insulation: This calculator can help you estimate the R-Value of a wall, with Infrared (IR) exterior and interior surface, and interior ambient temperatures. Provides a common wall material that best matches your readings with a general degree of confidence in that match. Note included tips on measuring for best results. Parallel R-Value: This calculator provides an overall R-Value (and U-Value) for a wood frame building assembly* (typically a wall), given the R-Values of different materials and their areas or proportions present in the assembly. *Not for use with metal framing. ASHRAE 62.2-2019: Gives ventilation CFM requirements corresponding to ASHRAE 62.2-2019. Fan Run-Time: Simple calculator to calculate ventilation system run time, in min/hr, given the ventilation requirement and fan capacity. Pairs nicely with ASHRAE 62.2 Calculator (and is automatically linked). Note: The above calculators use IP (inch / pound) units. Unit Converter: Converts units. Interpolator: For when you have the number you're looking for at THIS point and THAT point but you're actually somewhere BETWEEN those points. ## Key features - Single Point Psychrometrics - Mixed Air Psychrometrics - Duct Calculator (CFM, Diameter, Friction, Velocity) - Smallest Zone Calculator - Bypass Calculator (Cooling/Heating) - IR Wall Insulation R-Value Estimation - Parallel R-Value Calculator - Unit Converter ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/mean-hvac-bs-tools/id6621189879/reviews.md ### 5/5 — Easy calculations done for you *2026-02-07* This app makes converting values and psychrometrics very easy to understand and lets you get to the results without having to get bogged down in the math part. Great job with lots of useful features. ### 5/5 — What a time saver and accuracy booster! *2025-10-13* I learned about this app on the hvac grapevine podcast and it has made a world of positive impact on my Manual J inspection process using Amply Energy!! Everything I used to have to try to investigate (like insulation r-value) in the field is made much easier and more accurate by using actual testing of the materials! Thanks to Alex Meany for this phenomenal app! ### 5/5 — Works very well *2025-08-01* Very clean and easy to use app. Best one I have used to date. ## Frequently asked questions about Mean HVAC BS Tools ### What is Mean HVAC BS Tools? Mean HVAC BS Tools is a paid utility application designed for HVAC professionals. It offers a collection of calculators for psychrometric analysis, duct sizing, insulation R-value estimation, and more, all using IP units. ### What kind of calculations does Mean HVAC BS Tools offer? It provides single point and mixed air psychrometrics, a duct calculator that determines two parameters from any two inputs (CFM, Diameter, Friction, Velocity), smallest zone and bypass calculators, IR wall insulation R-value estimation, and parallel R-value calculations for wood frame assemblies. ### Does Mean HVAC BS Tools support metric units? No, the current version of Mean HVAC BS Tools exclusively uses IP (inch/pound) units for all its calculations. There is also a unit converter included within the app. ### Is Mean HVAC BS Tools suitable for metal framing? The Parallel R-Value calculator is specifically noted as not for use with metal framing. It is designed for wood frame building assemblies. ### What is the price of Mean HVAC BS Tools? Mean HVAC BS Tools is a paid application priced at $7.19. It does not feature in-app purchases or advertisements. ### What devices is Mean HVAC BS Tools available on? Mean HVAC BS Tools is available for iPhone, iPad, and iPod devices. It has an age rating of 4+. ### How often is Mean HVAC BS Tools updated? The latest version of Mean HVAC BS Tools is 1.3.1, which was last updated on June 15, 2025. This indicates a recent update, suggesting ongoing support. ### Does Mean HVAC BS Tools have ads? No, Mean HVAC BS Tools does not contain advertisements. It is a paid application that offers its full functionality without any ad interruptions. ## Version history (last 5 releases) ### 2.0.1 — 2026-08-04 BS Tools is now free-to-try! You can install this app for free and use some of the utilities. You can decide at any time if you'd like to purchase access to the rest of the utilities permanently for a SINGLE, ONE-TIME fee. Regardless, there are no advertisements or intrusive pop-ups. ### 2.0.0 — 2026-07-27 BS Tools is now free-to-try! You can install this app for free and use some of the utilities. You can decide at any time if you'd like to purchase access to the rest of the utilities permanently for a SINGLE, ONE-TIME fee. Regardless, there are no advertisements or intrusive pop-ups. ### 1.4.0 — 2026-06-25 Major changes! Added new utilities: - ASHRAE 62.2-2019 - Fan Run-Time - Interpolator Added a "Use Weather Data" button to the psychrometric calculators, which will auto-fill fields with data for a given location under specified conditions. Made a lot of improvements to performance and to the interface and user experience. ### 1.3.1 — 2025-06-15 Fixed a typo in Parallel R-Value: "Perferred" => "Preferred" ### 1.3.0 — 2025-05-27 We've now included a unit converter, which covers many common units in the following categories: Angle/Pitch, Area, Flow, Heat Capacity, Heat Density, Insulation, Length, Pressure, Temperature, Volume, and Weight. We've also tweaked the UI and performance of the app since its previous release. ## Apps similar to Mean HVAC BS Tools | App | Rating | Price | Category | | --- | --- | --- | --- | | [Boiler Efficiency](https://appshunter.io/ios/app/boiler-efficiency/id490506363) | — | $5.99 | Utilities | | [Heat Exchanger Area Pro](https://appshunter.io/ios/app/heat-exchanger-area-pro/id1487353492) | — | Free | Utilities | | [Geothermal Calculator](https://appshunter.io/ios/app/geothermal-calculator/id6448557390) | — | $2.99 | Utilities | | [Pressure Vessel Thickness](https://appshunter.io/ios/app/pressure-vessel-thickness/id1492098075) | — | $2.99 | Utilities | | [Energy Efficiency Suite](https://appshunter.io/ios/app/energy-efficiency-suite/id506662296) | — | $19.99 | Utilities | | [PsychroFlow Pro](https://appshunter.io/ios/app/psychroflow-pro/id6757249718) | — | $1.99 | Utilities | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-10.*