HeatLoad Pro vs DuctPro

HeatLoadPro is the fastest way for HVAC professionals to perform accurate Manual J-style heat load calculations on the job site. Simply scan a room using your iPhone's LiDAR sensor — HeatLoadPro automatically captures room dimensions, walls, windows, and doors. Annotate insulation types and construction details, then calculate in seconds. SCAN & CALCULATE • LiDAR-powered room scanning captures accurate dimensions automatically • Manual entry available for rooms without LiDAR access • Set local design conditions by ZIP code for climate-accurate calculations • Calculate heating and cooling loads for entire projects with one tap PROFESSIONAL REPORTS • Generate branded PDF heat load reports to share with clients or contractors • Equipment recommendations across 5 sizing tiers with efficiency options • Edit and customize equipment specs before exporting MANAGE YOUR PROJECTS • Organize multiple buildings and rooms in one place • Save and revisit projects at any time • Designed for HVAC contractors, engineers, and energy auditors SUBSCRIPTION HeatLoadPro requires an active subscription. • Monthly/Yearly subscriptions available Payment is charged to your Apple ID account. Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current period. Manage or cancel your subscription anytime in your Apple ID account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.heatloadpro.app/privacy

DuctPro is the professional HVAC duct sizing calculator built for field technicians and MEP engineers. Get engineering-grade results in seconds — offline, no subscription. RESULTS IN 3 TAPS Enter airflow, select duct type, get the size. Round, rectangular, flat oval, and flexible ducts. Size by friction rate or air velocity. A color-coded performance badge tells you instantly if your duct is optimal, too fast, too slow, or at risk. ENGINEERING-GRADE ENGINE Calculations use the Darcy-Weisbach friction equation with Colebrook-White solver — the industry-standard method for duct design. Nine material types with published roughness values: galvanized steel (spiral & rectangular), flexible duct (metallic & non-metallic), fiberglass duct board, fibrous glass liner, PVC, aluminum, and concrete. FITTINGS & PRESSURE DROP Calculate total system pressure drop including straight run and all fittings. Ten fitting types with industry-standard loss coefficients: 90° and 45° elbows (round and rectangular), mitered elbow, tee branch and straight-through, concentric reduction, enlargement, and butterfly damper. PRO MODE Unlock full 2D lookup tables for rectangular elbows and concentric reductions, plus A/B ratio selector for flat oval ducts. Bilinear interpolation for accurate results at any H/W or area-ratio geometry. ORGANIZE YOUR WORK Save calculations with a custom name and notes. Group them into color-coded projects. Export individual calculations as text or PDF, and full projects as CSV. Search your entire history in one tap. IMPERIAL & METRIC Switch between I-P and SI units at any time. All inputs and outputs update instantly across every screen. I-P: CFM · in · ft/min · inWC/100ft SI: L/s · mm · m/s · Pa/m 6 LANGUAGES English · Français · Español · Português · Deutsch · Italiano — 100% offline. No account. No subscription. —