--- title: "DuctWise HVAC Duct Calculator - Reviews, Revenue and Downloads in Lithuania | Apple App Store" description: "You already know how to size a duct. This agrees with your wheel, and then answers the part the wheel cannot. Type the airflow and the friction rate. DuctWise gives you a round size the supply house " --- # DuctWise HVAC Duct Calculator — Lithuania > Ductulator, sizing & static ![DuctWise HVAC Duct Calculator App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/4f/b2/a1/4fb2a126-56b6-8152-30df-0f3fe39d6fc0/AppIcon-0-0-1x_U007ephone-0-1-85-220.png/434x0w.png) **Developer:** [Yaniv van der Stigchel](https://apptail.io/developer/yaniv-van-der-stigchel-BKXMwc) (Netherlands) **Category:** Utilities **Rating:** N/A (0 ratings) **Price:** €5.99 **Bundle ID:** com.miniapps.DuctWise **Store:** Apple App Store **Country:** Lithuania **Version:** 1.3 (released 2026-11-07) **Original Release:** 2026-09-24 **Languages:** English, French, German, Portuguese, Spanish **App Store Link:** [Download on Apple App Store](https://apps.apple.com/lt/app/app/id6814964642) **AppTail Page:** [https://apptail.io/app/ductwise-hvac-duct-calculator-UCJC/lithuania](https://apptail.io/app/ductwise-hvac-duct-calculator-UCJC/lithuania) ## DuctWise HVAC Duct Calculator Description You already know how to size a duct. This agrees with your wheel, and then answers the part the wheel cannot. Type the airflow and the friction rate. DuctWise gives you a round size the supply house actually stocks, the velocity that size will really run at, and the static the whole run will cost you — off the ASHRAE friction chart for galvanised round duct, the same chart the ductulator in your door pocket is printed from. THE PART A WHEEL CANNOT DO The round size was never the hard part. What fits in a 2x10 joist bay is. Tap once and you get every stocked rectangular size that carries the same air, squarest first, with anything past 4:1 flagged before you order it — and the flat-oval sizes beside them, for the spaces where a rectangle will not go. It is equal friction, not equal area. A 20x8 does not carry what its area suggests, because the air drags past more metal on the way through. DuctWise uses Huebscher's equation, so the equivalents are honest. IT KNOWS WHAT THE DUCT IS FOR A bedroom branch and a shop main want very different velocities. Say which one you are running and every size is checked against the design band for that job — in the band, or above it, or below it, with the band drawn so you can see how close to the edge you are. Supply trunk, supply branch, return trunk, return branch, commercial main, commercial branch, commercial return. Typical values from Manual D and ASHRAE Fundamentals, with a line on each saying why the band is where it is. THE REST OF IT Static over the run. Enter the total equivalent length — straight duct plus the fittings — and see what the duct costs you in pascals, which is the number that has to fit inside the fan curve. Altitude correction. Friction loss falls with air density. A job a mile up loses about a sixth less pressure per 100 ft than the chart says, and the app accounts for it. Millimetres and litres per second, or inches and CFM. Friction in pascals per metre or in.wg/100ft. Switch at any time with nothing to re-enter. The friction chart for your airflow, with two sizes either side of the pick, so you can argue with the answer instead of taking it. WHAT IT IS NOT It does not calculate a heat load or a total effective length. It sizes one duct against one target. A whole system still needs Manual J and Manual D, and the job's specification governs. The app says so on its own Reference screen. One payment. No subscription, no account, no ads, and no network connection anywhere in it — which matters in a crawlspace, where there is no signal either. ## DuctWise HVAC Duct Calculator Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/a1/49/2b/a1492bbf-ee19-e968-00ef-4a60f6c28f5b/01-in-band.png/1284x2778.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/61/64/89/616489c2-a544-8d14-7930-9bcd685dfd13/02-rectangular.png/1284x2778.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/38/a1/8a/38a18a9f-96bc-0f0b-5b7d-7bfc2edf71f9/03-application.png/1284x2778.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/6b/73/71/6b73716f-9ff6-108c-56d5-ff39030c7199/04-oval.png/1284x2778.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/5f/6d/1a/5f6d1a13-4d52-7d1a-ecdb-14e45813a3ac/05-metric.png/1284x2778.png) ## DuctWise HVAC Duct Calculator Store Rankings | Chart | Country | Category | Rank | |-------|---------|----------|------| | Top Paid | Dominican Republic | Utilities | #4 | | Top Paid | Canada | Utilities | #17 | | Top Paid | United States | Utilities | #19 | | Top Paid | Australia | Utilities | #25 | | Top Paid | Dominican Republic | Overall | #35 | | Top Paid | Vietnam | Utilities | #37 | | Top Paid | Canada | Overall | #127 | | Top Paid | United States | Overall | #146 | | Top Paid | Vietnam | Overall | #167 | | Top Paid | Australia | Overall | #183 | ## DuctWise HVAC Duct Calculator Available In - [Argentina](https://apptail.io/app/ductwise-hvac-duct-calculator-UCJC/argentina) - [Germany](https://apptail.io/app/ductwise-hvac-duct-calculator-UCJC/germany) - [Croatia](https://apptail.io/app/ductwise-hvac-duct-calculator-UCJC/croatia) - [Hungary](https://apptail.io/app/ductwise-hvac-duct-calculator-UCJC/hungary) - [Kuwait](https://apptail.io/app/ductwise-hvac-duct-calculator-UCJC/kuwait) - [Lithuania](https://apptail.io/app/ductwise-hvac-duct-calculator-UCJC/lithuania) - [Nigeria](https://apptail.io/app/ductwise-hvac-duct-calculator-UCJC/nigeria) - [Philippines](https://apptail.io/app/ductwise-hvac-duct-calculator-UCJC/philippines) - [Paraguay](https://apptail.io/app/ductwise-hvac-duct-calculator-UCJC/paraguay) - [United States](https://apptail.io/app/ductwise-hvac-duct-calculator-UCJC/united-states) --- ## About AppTail [AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. 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