Facility Maps vs Mean HVAC BS Tools
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Facility Maps
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Capture, store and view your facility floor plans and maps all in one place on your device. Easy to use and and free! Everything is stored locally and does not connect to any outside services. Take a photo of your floor plans to save it in the app and always have all your plans in your pocket. Works offline when you do not have an internet connection.
Mean HVAC BS Tools
This utility app offers a suite of calculators for HVAC professionals, including psychrometric analysis, duct sizing, insulation R-value estimation, and air bypass calculations. It helps engineers and technicians quickly determine essential parameters for system design and analysis.
- 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
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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.
Screenshots
Verdict
The clearest difference is update cadence: Facility Maps at every 6 days against Mean HVAC BS Tools's every 2 months. Facility Maps also leads on iOS requirement (11.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Facility Maps ships an update every 6 days, Mean HVAC BS Tools every 2 months. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.
| Parameter | Facility Maps | Mean HVAC BS Tools |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (4 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 6 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 78 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Viewstride LLC | Mean HVAC Consulting & Design LLC |
In-app purchases
Facility Maps
No in-app purchases
Mean HVAC BS Tools
No in-app purchases
Questions
Is Facility Maps free?
Is Mean HVAC BS Tools free?
Do Facility Maps or Mean HVAC BS Tools have ads?
Which is updated more often, Facility Maps or Mean HVAC BS Tools?
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