Best HVACSize alternatives: apps like HVACSize

9+ similar apps compared and reviewed

4.9 avg rating
8 free apps
Updated October 2026

Looking for something like HVACSize? We've analyzed 9+ similar apps to help you find the best alternative. Each app is compared by ratings, features, and real user reviews, so you can make the right choice.

Top Alternatives to HVACSize

HVAC Load Calc: Manual J#2

HVAC Load Calc: Manual J by Vladimir Lukashov

Heating & cooling calculator
Strong Contender
🔧 Utilities
5.0(1 ratings)
FreeIn-App Purchases
HVAC Load Calc: Manual J screenshot 1
HVAC Load Calc: Manual J screenshot 2
HVAC Load Calc: Manual J screenshot 3
HVAC Load Calc: Manual J screenshot 4
HVAC Load Calc: Manual J screenshot 5
HVAC Load Calc: Manual J screenshot 6

Estimate a home's heating and cooling loads with a simplified block calculation. Input house details like area, insulation, and windows to see load breakdowns and check equipment against your quotes. Save, sync, and share detailed reports via PDF.

More apps like HVACSize

4
ScanPlan: HVAC Load & Ducts
ScanPlan: HVAC Load & Ducts
ScanPlan: HVAC Load & Ducts
LiDAR Floor Plans & HVAC Loads
Free

This app transforms your iPhone or iPad Pro into a comprehensive HVAC design toolkit. It allows for on-site room scanning with LiDAR, calculation of heating and cooling loads, duct and equipment sizing, and generation of professional PDF reports.

LiDAR room scanningManual J load calculationsDuct and equipment sizing
🔧 Utilities
(1)
free with in-app purchases
5
HVAC Calculator: BTU & AC Load
HVAC Calculator: BTU & AC Load
HVAC Calculator: BTU & AC Load
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HVAC Pro Calculator: NEC + P-T
HVAC Pro Calculator: NEC + P-T
HVAC Pro Calculator: NEC + P-T
BTU, Duct, P-T & Voltage
Free

This app provides essential tools for HVAC technicians and electricians, including BTU load sizing, duct calculations, and refrigerant pressure-temperature charts. It offers a free tier with core functions and an optional Pro upgrade for advanced features like voltage drop calculations and unlimited job saving.

BTU & Cooling Load SizingDuct Sizing CalculationsNEC Voltage Drop & Wire Sizing
🔧 Utilities
(1)
freemium
7
Engineering Calculator HVAC
Engineering Calculator HVAC
Engineering Calculator HVAC
by aleksandr bronnikov
Free
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(0)
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Unit Converter: Offline
Unit Converter: Offline
Unit Converter: Offline
Fast offline unit conversions
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9
Machinist Calc Pro 2
Machinist Calc Pro 2
Machinist Calc Pro 2
Machining Math Calculator
$29.99

This app provides comprehensive speed and feed calculations for various machining processes including milling, turning, drilling, and boring. It includes material and tool settings, drill and thread chart look-ups, and right triangle solutions.

Speed and feed calculations for milling, turning, drilling, boringMaterial and tool setting selectionBuilt-in drill and thread chart look-ups
🔧 Utilities
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paid