Best Hvac Calculator Prox Apps

Real-time product availability & pricingOrder status and notificationsVideo/Text technical support

This app provides HVAC technicians with instant access to product information, including warranty status, inventory, and technical specifications. It offers real-time support, order tracking, and helpful calculators to streamline job management and business growth.

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Ventora - AI HVAC Assistant

HVAC Calculators & Diagnostics

AI-powered HVAC diagnosticsProfessional-grade calculatorsOffline code references (IMC, UMC, ACCA)

This app provides HVAC technicians with an AI assistant for diagnostics, professional-grade calculators, and offline code references. It helps troubleshoot issues, size ducts, calculate efficiency ratings, and access industry standards quickly in the field.

HVAC cooling and heating loads

$24.99

Perform detailed heating and cooling load calculations for buildings in the field using your iPhone. Access a vast weather database and construction data to generate comprehensive reports that can be emailed or exported to spreadsheets.

Detailed heating and cooling load calculations1000+ city weather databaseExtensive construction type data

Ductulator - Duct Calculator

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paid

HVAC Airflow Sizing & Design

Duct sizing for round, rectangular, and flexible ductsFittings pressure drop calculationPsychrometric analysis with interactive chart

This app provides professional HVAC duct sizing and psychrometric calculations in a single tool. It offers detailed calculations for various duct types and materials, along with comprehensive humid air property analysis. Designed for HVAC professionals, it replaces traditional ductulators with accurate digital functionality.

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HVAC Load Calculator Manual J

BTU Sizing for Contractors

Multiple accuracy levels (Simple, Moderate, Pro)Offline-ready calculationsProfessional PDF report generation

$1.99 | 100% OFF

This app provides professional HVAC load calculations for contractors, offering three levels of accuracy from quick estimates to detailed Manual J calculations. It's designed for field use with an intuitive interface, offline capabilities, and professional report generation.

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BaseCalc HVAC Calculator

BTU CFM Duct Calculator

18 HVAC calculatorsBTU/CFM/Duct sizingPsychrometric calculations

This professional tool offers 18 HVAC calculators for field use, including BTU, CFM, duct sizing, and psychrometrics. It saves calculation history, job records, and allows PDF export of worksheets. The app works offline and features a high-contrast interface for job sites.

Built for HVAC Specialists

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freemium

HVAC Calculator Load Pro

Fast HVAC BTU calculationsResidential furnace & AC sizingClimate-aware calculations

$12.99 | 100% OFF

This tool provides fast, accurate HVAC load calculations for residential systems. It helps professionals size furnaces, air conditioners, and gas equipment correctly, avoiding guesswork and spreadsheets for confident client recommendations and more closed bids.

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Rule-of-thumb HVAC load calcs

HVAC Quick Load

$6.99

This app provides quick, rule-of-thumb HVAC load calculations for various building types. It estimates heating and cooling loads, as well as air flows, based on building type, area, and occupancy. Results can be emailed with an Excel spreadsheet attachment for further analysis.

Rule-of-thumb HVAC load calculationsSupports commercial, industrial, and residential buildingsEstimates cooling/heating loads and air flows

Heating & Cooling HVAC Pro+

(3)

paid

HVAC Tools

View pricing and order statusReal-time product availabilityFind branch locations and hours

This app provides HVAC professionals with quick access to product information, tools, and support. It allows users to check pricing, availability, find locations, and manage warranty claims. Features include a PT calculator, duct calculators, and a flashlight tool for on-site work.

HVAC Residential Load Calcs

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ad-supported

Calculate cool/heat loads...

$34.99

Perform detailed residential heating and cooling load calculations in the field. This app offers extensive data on building materials, weather, and project management for HVAC engineers and technicians.

Block and room-by-room load calculations1000+ city weather databaseExtensive construction material data

by Imogen Technologies LLC

ACCA Manual J 8th Edition complianceDOE and NREL data integrationProfessional HVAC load calculations

This app assists HVAC professionals with accurate load calculations for residential and commercial projects. It adheres to industry-standard ACCA Manual J 8th Edition guidelines, integrating data from DOE and NREL for precise results.

💼 Business

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SFP calculationsHeat recovery efficiencyAir velocity in ducts

HVACSize

Manual J Load Calculator

This app provides quick and easy calculations for HVAC professionals and enthusiasts. It simplifies complex formulas for energy use, airflow, and duct dimensions, making them accessible on your iPhone or iPad.

Heating & cooling calculator

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paid

HVAC Load Calc: Manual J

HVAC Calculator - FieldCalc

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R-454B PT,Superheat,Duct,Load

HVAC duct sizing and more...

$5.99

This app provides quick and simple HVAC duct sizing analysis. It allows users to calculate duct dimensions based on airflow or existing dimensions, and can also determine a range of duct sizes. Results can be emailed for further analysis.

Duct sizing by airflowDuct sizing by dimensionsRange of duct sizes calculation

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HVAC Test Prep Practice 2026

Practice HVAC Exam Questions