
Allday HVAC Calc
Pipe and Duct calculations
About
This app offers three specialized modules for HVAC engineers: a psychrometric calculator for air properties, a pipe calculator for fluid dynamics and selection, and a duct calculator for air speed and pressure loss. It provides detailed calculations and reference formulas in both SI and IP units.
What's New in Allday HVAC Calc
1.6.17
April 21, 2026
Pipe Calculator: - Enhanced Calculations: In the "Calculate Flow from Known Power" section, added the ability to calculate Power (Q) based on flow rate, as well as Inlet/Outlet temperatures (Tin/Tout) based on Q and flow rate. - High-Precision Mode: Triple-click headers to display additional decimal places for Q, Tin, and Tout. - Smart Sync: Temperature and flow rate values are now linked between Block 2 and Block 3 (consistent with the Duct module workflow). - Dynamic Unit Conversion: Improved behavior for alternative units in Blocks 2 and 3. When switching units after entering a value, the app now automatically recalculates the input. - Bug Fixes: * Resolved an issue with the glycol concentration dropdown menu. * Resolved an issue with incorrect viscosity values during SI-to-IP conversion for secondary units. * Fine-tuned the Friction (pressure drop) conversion factor to 0.122488 for IP systems. * Adjusted the Glycol Density conversion factor to 0.0625 for IP systems. Duct Calculator: - Dynamic Recalculation: Block 3 now automatically updates when humidity values are modified. - Improved Precision: Enhanced calculation accuracy for Block 3, including Reynolds number (Re) values. - UI Fluidity: Optimized and accelerated animations for a smoother and more responsive interface. - UI Improvements: Added grouping frames in the Duct description for better readability. - Accuracy: Standardized the Friction conversion factor to 0.122488 for IP system consistency. General Updates: - Performance: Optimized build size via image compression. - UX Overhaul: Redesigned the Help menu with categorized sections for easier navigation. - Input Fixes: Resolved selection glitches in multiple numeric input fields. - Stability: General performance improvements and minor bug fixes.
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FAQ
What calculations can Allday HVAC Calc perform?
Allday HVAC Calc offers three main modules: a psychrometric calculator for air properties, a pipe calculator for fluid dynamics and selection, and a duct calculator for air speed and pressure loss in various duct types. It supports both SI and IP units.
Is Allday HVAC Calc available on Android?
Based on the provided information, Allday HVAC Calc is currently supported on iPhone, iPad, and iPod. There is no mention of Android compatibility.
How often is Allday HVAC Calc updated?
The application was last updated on April 21, 2026, with version 1.6.17. This indicates a recent update, though the frequency of future updates is not specified.
What is the age rating for Allday HVAC Calc?
Allday HVAC Calc has an age rating of 4+, making it suitable for a wide range of users. This rating suggests it contains no mature content.
Does Allday HVAC Calc have ads?
No, Allday HVAC Calc does not contain advertisements. The 'hasAds' flag is set to false, indicating an ad-free user experience.
What is the user rating for Allday HVAC Calc?
Allday HVAC Calc has a perfect rating of 5.0 stars based on one review. This single rating suggests a highly positive initial user experience.
Can Allday HVAC Calc be used offline?
The provided description does not explicitly state whether Allday HVAC Calc can be used offline. However, its nature as a calculation tool suggests it may function without an internet connection.
Where can I find the web version of Allday HVAC Calc?
A web version of Allday HVAC Calc is available at calc.ashrae-meteo.info. This allows users to access its calculation features through a web browser.








