Best Residential Hvac Sizing Tool Apps

239+ iOS apps curated and reviewed

4.5 avg rating
16 free apps
Updated June 2026

Whether you're new to residential HVAC sizing tool or looking for an upgrade, our curated collection of 239+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Top Picks for Residential Hvac Sizing Tool

Bluon HVAC#1

Bluon HVAC by Bluon, Inc.

HVAC Tools
Editor's Choice
🔧 Utilities
4.8😐(4.4K ratings)
FreeAds
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Access a vast database of HVAC models, manuals, and part lists to speed up your work. Utilize an AI-powered troubleshooting tool or connect with experienced technicians for real-time support.

What We Love

  • 🤖 Helpful tech support
  • 💯 Comprehensive database of manuals and information
  • 🛠️ Useful tools and calculators
  • 🤝 Great customer service

Room to Improve

  • 💰 Paywall for advanced features
  • 🔒 Limited access without company account
  • 🔍 Missing manuals for some equipment models
SuperCool Slide Rule HVAC#2

SuperCool Slide Rule HVAC by Designstein, llc

Strong Contender
🔧 Utilities
4.2(185 ratings)
Free
SuperCool Slide Rule HVAC screenshot 1
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This app offers a comprehensive suite of tools for HVAC technicians. It provides interactive guides, step-by-step repair instructions, and calculators for various HVAC calculations including superheat, subcooling, and duct sizing.

Ductulator - Duct Sizing#3

Ductulator - Duct Sizing by Wassim Murr

HVAC Duct Design Calculator
Worth Considering
📊 Productivity
4.7(272 ratings)
$3.99
#32in Productivity
Ductulator - Duct Sizing screenshot 1
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Instantly calculate HVAC duct sizes based on airflow, friction rate, or velocity. This tool provides accurate duct dimensions in seconds without needing charts, supporting various duct types and units.

More Residential Hvac Sizing Tool apps to explore

4
CE HVAC Pro+
CE HVAC Pro+
CE HVAC Pro+
HVAC Tools
Free

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.

Real-time product availability & pricingOrder status and notificationsVideo/Text technical support
📊 Productivity
(1.5K)
free with in-app purchases
5
HVAC Load Calculator Manual J
HVAC Load Calculator Manual J
HVAC Load Calculator Manual J
BTU Sizing for Contractors
Free
$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.

Multiple accuracy levels (Simple, Moderate, Pro)Offline-ready calculationsProfessional PDF report generation
🔧 Utilities
(28)
free with in-app purchases
6
HVAC Duct Sizer
HVAC Duct Sizer
HVAC Duct Sizer
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
🔧 Utilities
(8)
free with in-app purchases
7
measureQuick HVAC
measureQuick HVAC
measureQuick HVAC
Connect. Perform. Prosper.
Free

This application helps HVAC technicians diagnose and repair systems quickly and accurately. It offers robust diagnostic tools to identify problems faster, leading to fewer callbacks and more satisfied customers. It supports various HVAC systems, making it an all-in-one solution for professionals.

Quick HVAC system diagnosisAccurate repair solutionsReduced troubleshooting time
📊 Productivity
(5)
free
8
HVACR Check & Charge
HVACR Check & Charge
HVACR Check & Charge
PT Charts Superheat Subcooling
Free

This app provides an instant mobile refrigerant charge calculator for HVACR applications. It supports various refrigerants and allows users to calculate the correct system charge based on superheat, subcooling, or airflow, along with environmental conditions.

Instant refrigerant charge calculatorSuperheat calculator (non-TXV)Subcooling calculator (TXV)
🔍 Reference
(16K)
free
9
HVAC Toolkit
HVAC Toolkit
HVAC Toolkit
HVAC calcs for all your needs
$23.99

This comprehensive toolkit offers essential HVAC calculations and tools for professionals. It combines multiple specialized applications into a single, convenient package for iPhone and iPad users.

Equipment tracking and customizationRefrigerant pressure-temperature chartsRefrigerant charge calculations
📊 Productivity
(2)
paid
10
HVAC School
HVAC School
HVAC School
By Techs For Techs
Free

This app serves as a comprehensive resource for HVAC technicians, offering a podcast, tech tip articles, and interactive calculators. It aims to enhance knowledge of HVAC theory, industry updates, and essential mathematics for both current and aspiring professionals.

HVAC School podcast episodesTech tip articles by professionalsInteractive HVAC equation calculators
📚 Education
(81)
free
11
Gemaire HVAC Pro+
Gemaire HVAC Pro+
Gemaire HVAC Pro+
HVAC Tools
Free

This app provides HVAC professionals with essential tools and product information to streamline their work. Access pricing, order status, real-time availability, and technical support. It also includes inventory management, warranty services, and helpful calculators.

View pricing and order statusReal-time product availabilitySearch for HVAC models and parts
📊 Productivity
(798)
free with in-app purchases
12
Duct Calculator - DuctCalc
Duct Calculator - DuctCalc
Duct Calculator - DuctCalc
HVAC Sizing & Psychrometric
Free

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.

Duct sizing for round, rectangular, and flexible ductsFittings pressure drop calculationPsychrometric analysis with interactive chart
🔧 Utilities
(7)
free with in-app purchases
13
HVAC PT Chart
HVAC PT Chart
HVAC PT Chart
HVAC Pressure/Temp Charts
Free

This tool provides HVAC technicians with instant access to pressure and temperature data for over 100 refrigerants. It allows users to input one value to find the other, view detailed refrigerant properties, and email comprehensive charts and data.

Pressure/temperature lookup for 100+ refrigerantsInput temperature to find pressure, or vice versaSlider control for precise value selection
📊 Productivity
(8)
free
14
IN HVAC Calculator
IN HVAC Calculator
IN HVAC Calculator
HVAC Calculator & Reference
Free

This app provides HVAC inspection tools and guidelines for home inspectors. It helps estimate equipment age, size, and requirements, giving inspectors confidence in their reports.

Equipment circuit requirements calculatorAC tonnage estimation by model numberHVAC manufacture date lookup
🔧 Utilities
(11)
free
15
HVAC Calculator Load Pro
HVAC Calculator Load Pro
HVAC Calculator Load Pro
Built for HVAC Specialists
Free
$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.

Fast HVAC BTU calculationsResidential furnace & AC sizingClimate-aware calculations
📊 Productivity
(1)
free with in-app purchases
16
SMACNA Duct-U-Lator
SMACNA Duct-U-Lator
SMACNA Duct-U-Lator
Size Simple HVAC Duct Runs
Free

This tool simplifies HVAC duct sizing for professionals. It quickly calculates dimensions for rectangular, round, and oval ducts based on airflow, friction loss, and velocity, ensuring optimal ventilation system performance.

Rectangular, round, and oval duct sizingReal-time calculation updatesConverts duct shapes and sizes
💼 Business
(1)
free
17
HVAC Residential Load Calcs
HVAC Residential Load Calcs
HVAC Residential Load Calcs
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
💼 Business
(3)
paid
18
AC Calculator - HVAC Sizing
AC Calculator - HVAC Sizing
AC Calculator - HVAC Sizing
Air conditioner or Heat Pump
Free

This utility app simplifies HVAC sizing by calculating BTU/h capacity and recommending equipment. It offers unit conversions, price estimates, and energy consumption comparisons. Advanced features can be unlocked via in-app purchases.

Calculate BTU/h capacityRecommend equipment typesConvert BTU, kW, Kcal, Tons
🔧 Utilities
(20)
free with in-app purchases
19
Baker HVAC Pro+
Baker HVAC Pro+
Baker HVAC Pro+
HVAC Tools
Free

This app provides HVAC/R professionals with on-the-go access to product information and essential tools. It features real-time order tracking, a duct calculator, warranty verification, and branch location details. Users can also search for parts, view technical documents, and receive special offer notifications.

Real-time order statusDuct calculatorProduct availability and pricing
📊 Productivity
(570)
ad-supported
20
Kelley HVAC Pro (5a17df)
Kelley HVAC Pro (5a17df)
Kelley HVAC Pro (5a17df)
HVAC Estimating & Load Calc
Free

This app streamlines HVAC business operations with AI-powered estimates, CRM, and professional tools. It helps contractors generate quotes, manage customers, and track job details efficiently from the field.

AI-powered estimatesLoad calculations (Manual J, D, S)Customer Relationship Management (CRM)
💼 Business
(1)
subscription