HVAC Heat Load BTU Calculator

1.0.5

ZkDev

0.00

0 reviews

1,000+
Downloads

Free

Manual J heat load calculator. BTU sizing, ASHRAE climate zones.

HVAC Heat Load BTU Calculator Screenshot 1 of 6

HVAC Heat Load BTU Calculator Screenshot 2 of 6

HVAC Heat Load BTU Calculator Screenshot 3 of 6

HVAC Heat Load BTU Calculator Screenshot 4 of 6

HVAC Heat Load BTU Calculator Screenshot 5 of 6

HVAC Heat Load BTU Calculator Screenshot 6 of 6

Download from Google Play

About HVAC Heat Load BTU Calculator

HVAC Heat Load BTU Calculator is a tools app developed by ZkDev.

Download Statistics

HVAC Heat Load BTU Calculator has been downloaded 1.3 thousand times. In the last 30 days, the app was downloaded 250 times.

User Ratings

The app has no ratings yet.

App Information

HVAC Heat Load BTU Calculator is FREE to download. The APK download size is 20.52 MB. The latest version available is 1.0.5. The last update was on August 24, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on Google Play April 2026.

Description

HVAC Heat Load BTU Calculator helps HVAC technicians, engineers, and contractors calculate accurate cooling and heating loads. Calculate accurate cooling and heating loads using a simplified ACCA Manual J methodology based on room dimensions, insulation levels, window types, and ASHRAE climate zones — the industry standard for professional air conditioning system sizing.

LOAD CALCULATION MODES:
Cooling Mode — Calculate BTU/h cooling requirement for air conditioning
Heating Mode — Calculate BTU/h heating requirement for furnace and heat pump sizing
Automatic Tonnage Conversion — Get AC tonnage (0.5 to 5+ tons) from load results
CFM Requirement — Airflow from the supply-air temperature difference, around 400 CFM per ton

ROOM PARAMETERS:
Room Dimensions — Enter length, width, and ceiling height
Exterior Walls — Count how many of the room's walls face outdoors
Insulation Levels — Poor, Average, Good, or Excellent, mapped to assembly U-factors
Window Types — Single Pane, Double Pane, Triple Pane, Low-E, with U-factor and SHGC
Window Orientation — North, East, South, West or mixed exposure for solar gain
Floor Type — Over conditioned space, over crawlspace/garage, or slab on grade
Climate Zones — 5 zones with ASHRAE design temperatures, overridable by hand
Duct Location — Add duct gain/loss when the ducts run through unconditioned space
Occupant Load — Sensible and latent heat from building occupants

COMPONENT BREAKDOWN:
Wall conduction load
Window conduction and SHGC-based solar gain, shown separately
Ceiling and roof heat gain
Floor and slab-perimeter load
Infiltration load from envelope tightness
Occupant sensible and latent heat
Duct gain/loss in unconditioned space
Sensible and latent totals, tonnage, airflow and BTU/h per sq ft

OPTIONAL PRO UPGRADE — $2.99 ONE-TIME IN-APP PURCHASE
The following features require a separate one-time in-app purchase. They are not required to use the calculator:
• Unlimited saved calculation history
• PDF export of results
• Dark theme
• Ad-free experience

WHY HVAC PROS USE THIS CALCULATOR:
Faster Manual J estimates than spreadsheets or online calculators
Accurate BTU sizing prevents oversized/undersized systems
Reduces callbacks from incorrect system selection
Quick cooling load checks on service calls
ASHRAE-compliant Manual J methodology for commercial work
Improves customer confidence with detailed technical reports

PERFECT FOR:
HVAC design engineers sizing air conditioning systems
HVAC field technicians quick-checking load requirements
AC contractors preparing accurate equipment bids
HVAC apprentices learning Manual J methodology
Building maintenance engineers planning replacements
Residential and commercial HVAC system sizing
Energy auditors estimating cooling needs

Based on ACCA Manual J design methodology: assembly U-factors, SHGC-based solar gain, ASHRAE design conditions, and no arbitrary safety padding.

Part of HVACTools Suite — the professional HVAC technician app for field calculations, refrigeration diagnostics, and air conditioning system design.

Recent changes:
Rebuilt the load calculation for accuracy:
- Real assembly U-factors for walls, ceiling and floor
- Solar gain from window SHGC and orientation, not the U-factor
- ASHRAE design temperatures per zone, with manual override
- Sensible and latent loads shown separately
- Airflow from supply-air delta T (about 400 CFM per ton)
- Added inputs: exterior walls, window orientation, floor type, duct location
Cold start is faster: the ads SDK no longer blocks the first screen.

Show more Show less

More data about HVAC Heat Load BTU Calculator

Price	Free to download
Total downloads	1.3 thousand
Recent downloads	250
Rating	No ratings
Ranking	Not ranked
Version	1.0.5
APK size	20.5 MB
Number of libraries	?
Suitable for	Everyone
Ads	Contains ads

App Performance Report

Get a detailed PDF report for HVAC Heat Load BTU Calculator with download trends, rating history, and key performance statistics — useful for competitive research or tracking your own app. Learn more

Get PDF Report — $29

Alternative downloads for the HVAC Heat Load BTU Calculator app

HVAC Heat Load BTU Calculator compared with similar apps

Common keywords of similar apps

Load Manual Gain Sizing Ashrae Window Design Zones Calculate Accurate Methodology Walls Shgc Solar Floor Latent Climate Engineers Loads Calculation Requirement Tonnage Cfm Airflow Ceiling Assembly Factors Pane Orientation Space Technicians Contractors Acca Dimensions Insulation Levels Types Hvac Heat Btu Cooling Air Calculator Heating Based Conditioning System Duct Room App

Keywords missing from this app

Test Temperature Exam Practice Rv Recent Conditioner Equipment Units Features Pressure Index Pump Application Furnace Refrigeration Support Tool Home Make Interface Gas Performance Time Learning Access Inspector Ac Size Products Supply Easy Users Mode Provide Real Tech

Downloads over time

Subscribe to see download velocity and history

HVAC Heat Load BTU Calculator has been downloaded 1.3 thousand times. Over the past 30 days, it has been downloaded 250 times.

Changelog of HVAC Heat Load BTU Calculator

Show changelog

Developer information for ZkDev

ZkDev

support@tradetools.dev

Website

Legal name:

Address:

Are you the developer of this app? Join us for free to see more information about your app and learn how we can help you promote and earn money with your app.

I'm the developer of this app

Comments on HVAC Heat Load BTU Calculator for Android

★★★★★ Matthew Ipemu · Jun 20, 2026

Very useful for a quick assessment of the heating and cooling requirements, room by room basis

Google Play Rankings for HVAC Heat Load BTU Calculator

This app is not ranked

Technologies used by HVAC Heat Load BTU Calculator

12 permissions

Subscribe to see full permission and library details

Frequently asked questions about HVAC Heat Load BTU Calculator

Is HVAC Heat Load BTU Calculator free?

Yes. HVAC Heat Load BTU Calculator is free to download from Google Play.

Is HVAC Heat Load BTU Calculator still available?

Yes. HVAC Heat Load BTU Calculator is on Google Play, and the last update we saw was on August 24, 2026.

Does HVAC Heat Load BTU Calculator contain ads?

Yes. Google Play lists HVAC Heat Load BTU Calculator as containing ads.

How large is the HVAC Heat Load BTU Calculator APK?

The HVAC Heat Load BTU Calculator APK is 20.52 MB.

Is HVAC Heat Load BTU Calculator suitable for children?

Google Play rates the content of HVAC Heat Load BTU Calculator as suitable for everyone.

How many times has HVAC Heat Load BTU Calculator been downloaded?

Google Play lists 1,000+ downloads for HVAC Heat Load BTU Calculator.

Who made HVAC Heat Load BTU Calculator?

HVAC Heat Load BTU Calculator was developed by ZkDev. It is listed in the tools category on Google Play.

What are the best alternatives to HVAC Heat Load BTU Calculator?

People looking at HVAC Heat Load BTU Calculator also look at these tools apps: BTU Calculator - AC, Heat Pump, AC Calculator - HVAC Sizing, Cold Room Calculator, Duct Calc Elite - Ductulator, Air Conditioner - Calculator.

Apps on sale Popular Tools Apps Apps other people are watching Top new apps Today's trending apps

AppBrain is a directory focused on discovering great apps and games. We give statistics, rankings and search options that Google Play and the App Store don't have. All trademarks are owned by their respective owners. AppBrain doesn't offer APKs or binaries, and always lets users install the official version from Google Play or the App Store.

More apps