--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Duct Calculator: HVAC Sizing" developer_entity: "Vladimir Lukashov" bundle_id: "com.vovaluka.ductulator" app_store_id: "6789039757" category: "Utilities" primary_platform: "ios" primary_monetization: "Subscription" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-09-01" report_date: "2026-09-24" last_verified: "2026-09-24T00:00:00.000Z" report_version: "1.1.0" total_reviews: 0 confidence: "low" confidence_score: 0.2 data_age_days: 37 momentum_velocity: "maintenance" intelligence_version: 2 tags: ["utilities", "subscription", "mobile app", "app review", "app analysis", "professionals", "contractors", "requiring"] canonical_url: "https://marlvel.ai/apps/duct-calculator-hvac-sizing" license: "CC-BY-NC 4.0" content_version: "v2" --- # Duct Calculator: HVAC Sizing Intelligence Report ## TL;DR {#tldr} - **Category**: Utilities · Subscription > **TL;DR:** Duct Calculator: HVAC Sizing is a utilities app by Vladimir Lukashov, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Duct Calculator: HVAC Sizing is a utilities app by Vladimir Lukashov. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Utilities | | **Developer** | Vladimir Lukashov | | **Pricing** | Subscription | | **Platforms** | iOS | | **Confidence** | Low (0.2/1.0) | | **Data Age** | 37d | ## Metadata & Market Performance - **Publisher:** Vladimir Lukashov - **Category:** Utilities - **Target Audience:** HVAC professionals and contractors requiring precise, physics-based duct sizing tools in the field. - **Platforms:** iOS - **Version Reviewed:** 1.1.0 - **Report Date:** 2026-09-24 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.2/1.0) - **App Store ID (iOS):** 6789039757 - **Bundle ID:** com.vovaluka.ductulator - **Data Window:** Analysis based on signals collected up to 2026-09-24 ## Executive Snapshot **What it is:** Duct Calculator: HVAC Sizing is a professional HVAC utility for duct sizing and diagnostic checks on iOS. **Why users hire it:** It removes the physical bulk and calculation limitations of cardboard slide rules for field technicians needing ASHRAE-compliant results. ## App DNA (Features & Intent) - **[Differentiator] Equal-friction duct sizing:** Calculates duct diameter or rectangular dimensions based on airflow and friction rate using Darcy-Weisbach physics. * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. - **[Differentiator] Material-specific ASHRAE roughness:** Adjusts calculations for galvanized, duct board, or flexible duct materials based on specific ASHRAE roughness factors. - **[Standard] Duct check mode:** Inputs existing duct dimensions to calculate current velocity, friction rate, and airflow capacity. * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. ## Market Position {#market-position} Duct Calculator: HVAC Sizing occupies the professional utility niche, competing directly with physical slide rules by offering digital ASHRAE-compliant calculations. The lack of public ratings suggests an early-stage market entry where professional trust remains the primary growth hurdle. ## Monetization Strategy - **Model:** Subscription - **Tiers:** Free trial available, Subscription required for full tool access - **Analysis:** Subscription model gated by a free trial, positioning the tool as a professional utility rather than a one-time purchase. ## SWOT Analysis {#swot} **Core Strengths:** - Physics-based Darcy-Weisbach engine provides professional-grade accuracy - Material-specific ASHRAE roughness settings ensure Manual D compliance - Persistent friction rate settings reduce data-entry errors in multi-step design workflows **Growth Levers:** - Localized support for international duct standards could expand the addressable market - Integration with digital Manual D reporting tools could increase professional stickiness ## What's New - **Latest (v1.1.0, 3 weeks ago):** Added duct material-specific ASHRAE roughness calculations, a new Check tab for velocity and friction analysis, and persistent friction rate settings. ## App Momentum (Maintenance) {#momentum} - Shipped material-specific ASHRAE roughness settings. - Added diagnostic Check tab for velocity. - Ships maintenance-mode updates. > **Cadence:** 1 total versions · 1 majors in last 6 months · 22 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Duct Calculator: HVAC Sizing is an utilities app. > **Bottom Line:** Focusing on physics-based accuracy for Manual D compliance would solidify the professional utility of Duct Calculator: HVAC Sizing, as the current subscription model requires a clear value proposition to displace traditional tools. **Best for:** HVAC professionals and contractors requiring precise, physics-based duct sizing tools in the field. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Invest in offline-first sync for calculation history because field technicians often work in low-connectivity zones → increase utility in remote job sites ### Outlook: Stable The professional HVAC utility market is shifting toward digital, physics-based tools that replace legacy physical slide rules. Duct Calculator: HVAC Sizing is well-positioned to capture this segment if it continues to prioritize Manual D compliance and professional-grade accuracy in its update cadence. - 🟢 The latest release introduced material-specific ASHRAE roughness, demonstrating active feature investment rather than maintenance-only updates. - ⚪ The current subscription-only model limits the top-of-funnel reach among casual contractors who prefer one-time purchases. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Subscription | | Platforms | iOS | | Key Features | 3 analyzed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Duct Calculator: HVAC Sizing** (this app) | N/A/5 | N/A | Vladimir Lukashov | | [Sota Connect: Secure Network](https://marlvel.ai/apps/fi-catconnect-sota) | 4.8/5 | N/A | Cat Connect | | [V2Box - V2ray Client](https://marlvel.ai/apps/v2box-v2ray-client) | 4.6/5 | n/a | techlaim | | [avoVPN Desktop](https://marlvel.ai/apps/avovpn-desktop) | N/A/5 | N/A | Avocado VPN Technologies | | [Fusvob VPN : Super VPN 2026](https://marlvel.ai/apps/com-toplinkc-foxexcellent) | 4.5/5 | Mixed | Fuxin Technology | | [Gear Ratio Calculator & RPM](https://marlvel.ai/apps/cog-gear-ratio-calculator) | N/A/5 | N/A | Linh Phan Nhat Khanh | ## Company Profile - **Developer:** Vladimir Lukashov - **Website:** [https://ductulator.vovaluka.com](https://ductulator.vovaluka.com) ## Data Sources & Links - **App Store ID:** 6789039757 - **Dev Site:** [Official Website](https://ductulator.vovaluka.com) - **Sources:** Developer website content, App store metadata. ## Related Intel Reports - [*Sota Connect: Secure Network*](https://marlvel.ai/apps/fi-catconnect-sota) (Cat Connect) · 4.8/5 Rating - [*V2Box - V2ray Client*](https://marlvel.ai/apps/v2box-v2ray-client) (techlaim) · 4.6/5 Rating - [*avoVPN Desktop*](https://marlvel.ai/apps/avovpn-desktop) (Avocado VPN Technologies) · N/A Rating - [*Fusvob VPN : Super VPN 2026*](https://marlvel.ai/apps/com-toplinkc-foxexcellent) (Fuxin Technology) · 4.5/5 Rating - [*Gear Ratio Calculator & RPM*](https://marlvel.ai/apps/cog-gear-ratio-calculator) (Linh Phan Nhat Khanh) · N/A Rating - [*NordVPN: VPN Fast & Secure*](https://marlvel.ai/apps/com-nordvpn-nordvpn) (Nordvpn S.A.) · 4.7/5 Rating - [*Pulley Calculator Easy*](https://marlvel.ai/apps/pulley-calculator-easy) (YAVUZ BULAMADIK) · N/A Rating - [*Track And Field Companion*](https://marlvel.ai/apps/track-and-field-companion) (Travis Menghini) · N/A Rating - [*VPN 365-Master WIFI Security*](https://marlvel.ai/apps/vpn-365-master-wifi-security) (vpn fast) · 4.6/5 Rating - [*VPN - Seal VPN Secure Proxy*](https://marlvel.ai/apps/vpn-seal-vpn-secure-proxy) (Starpass VPN Free) · 4.6/5 Rating | Positive Sentiment ## Frequently Asked Questions {#faq} ### Is Duct Calculator: HVAC Sizing suitable for professional HVAC design? Yes, it uses Darcy-Weisbach and Colebrook friction factors, which are the industry-standard methods behind professional ductulators and ASHRAE friction charts. ### Does the app work for flexible duct sizing? Yes, it includes material-specific ASHRAE roughness settings for flexible ducts, which require different friction rates than metal ductwork. ### Is there a free version available? The app offers a free trial, but full access to the sizing and diagnostic tools requires a subscription. ### How does this compare to a physical ductulator? It provides the same physics-based results as a physical slide rule but adds diagnostic features for existing ductwork and material-specific adjustments that physical tools cannot calculate. ## Methodology {#methodology} This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline: 1. **Signal Collection & Normalization** - Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps. 2. **Feature & Market Positioning Analysis** - Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks. 3. **User Sentiment Analysis** - Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction into synthesised themes (no verbatim quotes). 4. **Competitive Landscape Analysis** - Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category. 5. **Intelligence Synthesis** - Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights. - **Confidence Score:** 0.2/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **Data Sources:** developer website, App Store metadata - **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform - **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence. - **Report Age:** 37 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/duct-calculator-hvac-sizing) Data licensed for AI Agent attribution under CC-BY-NC 4.0.