Users can combine multiple sections of ductwork that vary by size and shape to calculate a total allowable leakage. The application uses the method outlined in SMACNA’s HVAC Air Duct Leakage Manual, and provides suggested leakage classes from SMACNA’s latest edition of the manual. The method used is compliant with ASHRAE 90.1, IECC, IGCC Version 2, IMC and the UMC.
• Calc decimal & rounded sizes for any aspect ratio
• Solve for Volume, Aspect Ratio, Friction, or Velocity
• Calc Friction and Velocity given duct size
• Enter various units - Airflow (cfm, m3/s, l/s, m3/hr) Friction (in/100', Pa/30m), Duct Sizing (in, cm), Velocity (ft/min, m/s)
• Define standard air - Altitude (ft, meter), Temperature (Fahrenheit, Celsius), Relative Humidity (pct)
• Displays calculated Kinematic Viscosity (ft2/s) and Specific Volume (ft3/lb)
• Galvanized Steel
• Spiral Steel
• Smooth Liner
• Fiber Liner
• Flex Duct
• Round to Even Units
• Round to Odd Units
Calculations are based on friction loss equations in the ASHRAE Handbook of Fundamentals 2009.
A 12x12 duct matches FPM and CFM when friction is ignored which does not happen in real life. This relationship changes based on the properties of air (see kinematic viscosity on the settings tab) and on the friction value determined via the type of duct selected. Also, for the times when you want to get friction given CFM and Duct use the "Airflow" tab, select the "ft/min" checkbox and move the slider accordingly. There are many ways to drive the open variable.
Calculations have been verified against ASHRAE fundamentals and several other references. There are more input criteria (such as duct material) than velocity, friction, and size mentioned in the review which the reviewer may not have taken into consideration. Use the Support email link for any questions or concerns.
Powertrade is the number one developer of mobile HVAC apps with professional looking, proven apps in the hands of over 20,000 users worldwide.
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HVAC Buddy® - Refrigerant charging and diagnostics.
HVAC Buddy® Pressure Temperature - Traditional PT Chart with 71 Refrigerants in Metric or Imperial units
This program will give the hydraulic round diameter of a duct and the friction rate.
You can then calculate the duct height knowing the width...
Please watch out for PRO version which shall cover a bigger range with more features. This PRO version shall be chargeable.
Pro Version different from this version is released https://play.google.com/store/apps/details?id=com.rioCADDSys.ductbackcalc ..
The calculation is performed assuming that the pressure drop per unit length along the pipe is a constant.
The Øeq hydraulic diameter corresponds to the diameter of a circular channel that would cause the same loss of load of the real geometry, equal to resistance coefficient of the motion of the air.
After calculating the app will send to your e-mail address a text file with all the channels' branches calculated.
The scenarios for the app are limited to joint lengths of 4, 5, and 6 feet. The transverse connections are limited to T1 (flat drive), T5 (flat slip), T10, 11, and 12 (standing slips) and T25 a or b (TDC/TDF). Where appropriate the app will also provide options for intermediate reinforcement. The full range of reinforcement spacing options is 6, 5, 4, 3, 2 ½, and 2 feet.
In most cases the app will provide options for internal reinforcements and external reinforcements. Internal options are limited to EMT conduit tie rods and external reinforcements are limited to angles. Enough information is provided so users can choose other options from SMACNA’s Standard.
The output of the app is a written description of the duct as well as a graphic representation. Users can view the report on-screen or email it.
This app does not provide every possible solution found in SMACNA’s standard and it will not provide every detail. For example, the app does not provide requirements for the proper attachment of the reinforcements. The app is intended to be used in conjunction with SMACNA’s HVAC Duct Construction Standard.
--- This Professional Ducting Design Software is a fast analyzer tool for you 2D Contractor submitted drawings.
--- The Application works like an old hand held ductulator.
--- The change is that you can review a contractors drawing and know about the Main duct Velocity and friction rate which is not mentioned on the drawings.
--- Once the Main Duct Parameters are established one can analyse the rest of the ducting.
BEST Feature :
----VERY Important and USEFUL TOOL which will go with the modern new age analyses i.e You can export the designed ducts to Drawing Exchange Format DXF which can be brought inside AutoCAD, or Navis Works or any 3D package to check interference. use etools to view on android mobile or AutoDESK 360
1. Duct Sizer: This module allows you to quickly size one HVAC duct run or a range of duct sizes for a wide variety of duct materials and shapes.
2. PT Chart: This module is an electronic pressure-temperature (PT) look-up chart that allows you to specify the exact refrigerant temperature/pressure and view the corresponding pressure/temperature value. It also displays a complete list of pressure/temperature values in 1 degree increments for over 70 different refrigerants. You can adjust the elevation so proper gauge pressures are displayed. Additional functionality includes the ability to display specific refrigerant properties and email the entire PT chart list for a specific refrigerant.
3. Capillary Tube Calculator: This module allows you to perform capillary tube look-up based upon HP, condenser cooled type, and refrigerant type.
4. Store Locator: This module allows you to find the closest Johnstone Supply store to where you are currently located. You can also type in a zip code to find all Johnstone Supply stores within a specific radius.
5.AC/Gas Furnace Efficiency Savings Calculator: This module allows you to quickly calculate the energy savings for cooling or heating based upon selecting the old/new unit information and your region.
Enjoy the convenience of using your phone or tablet to look up details or research information, whenever and wherever you do business. It can be used by contractors, office administration and sales support to maximize efficiencies and productivity.
This application was initially developed for a friend and we decided to share it.
It supports different units depending on the calculation which is used:
- Rectangular/Square duct
- Circular duct
- Smoke extraction
You can use Gesture to switch between screen, clean the screen, ...
You can also send your result by email to work on them later.
If you need more units, feel free to contact us.
The application is available is English & French.
Cut Calculator allows you to optimize the use of the gear in such a way as to minimize waste.
If you work with ducts for electric wires, copper bars, rods omega, tubes, know how easy it is located, at the end of a job, several pieces of waste too short to be used.
With this application you can just enter the length of the pieces of new material, the length of the cuts you need and its amount, and the number of lots to obtain. Cut Calculator will tell you how many whole pieces of material you need and how to cut each of them in order to have the least amount of waste possible.
Enter the length of the pieces of material as well as you are given by your supplier.
Enter the step of cuts (in some materials it is necessary to specify, such as toothed raceways for electrical cables, it is possible to cut only in the space between two teeth).
Enter, if applicable, the thickness of the material removed by the cutting tool (example: the thickness of the blade)
Enter the lengths of the cuts you need, indicating length and quantity.
Check the entered data and tells you how many lots you need.
Let Cut Calculator draw up for you and then follow the directions of the results to cut your material.
Each entry in the list of results is a piece of material, listed below are the cuts to be performed on that piece.
Once you cut the piece, tap the checkmark to remember how far you've come and go to the next.
The Installation Instructions app demonstrates the correct installation techniques for a range of seals. It features a combination of film, animation and supporting documentation to give as close an experience to having the expert install the seals right in front of you.
Features at a glance
• Installing hydraulic seals for rod and piston with and without pre-tensioning elements
• Including single- and double-acting rod and piston seals (PTFE and Polyurethane)
• Installing Radial Oil Seals
• Visual Inspection of seals, bore and shaft, including surface finishes
• Common mistakes and best practice during installation
• Use of assembly cones and installation tools
Step by step walk trough:
1. On the intro page you can either select to start the calculator or go the the about section.
2. Room details page
When clicked (or swiped left) on the start page, the following fields should be filled in:
- Project name (e.g. Project home)
- Room name (e.g. My Room)
- Room Size: length/width/height
- The dimensions can be selected either in meters or centimeters
- Click on the continue button or simply swipe left
3. Room summary and air conditioner selection page
On this page you can view the estimated BTU's needed for your room and select the type of air condition you want. After the selection of the type, the user can read the details of that air conditioner. Details consists of Brand name, price, price per month and an image. The payment type (cash, transfer, monthly payment) can also be selected.
Click on the continue button or simply swipe left. To go back swipe right.
4. User info page
On this page you can fill in your name, address, email and phone.
Click on the continue button or simply swipe left. To go back swipe right.
5. Thank you page
After this step the details will be mailed to NewTech. A copy of the details will be mailed to you.
NewTech will contact you after reviewing all your data. If necessary, NewTech will provide you with a more sustainable / efficient solution.
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In 2013, ASH will continue to add the Society's Quick Reference Guides to this app including Anticoagulant Dosing and Management of Anticoagulant-Associated Bleeding Complications in Adults.
The MTS 2015 app is your comprehensive guide to the conference. Access your schedule, event information, network with attendees and more!
All FORGE FAIR 2015 events will be held at the Cleveland Convention Center, which is located in the middle of a vibrant city. The area is alive with cultural activities, arts, sports and entertainment – all within walking distance.