# ManualJ Lite

> HVAC Load Calculator

Canonical page: [https://chrome-stats.com/d/id6761507693](https://chrome-stats.com/d/id6761507693)

## Overview

- **ID:** `id6761507693`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Shanghai Sheyuan Network Technology Co., Ltd.
- **Category:** Utilities
- **Version:** 1.2
- **Last updated:** 2026-06-28
- **First published:** 2026-04-02
- **Size:** 1.11 MB
- **Data as of:** 2026-09-25
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/manualj-lite/id6761507693)
- **Website:** [https://calcspec.com/app-privacy.html](https://calcspec.com/app-privacy.html)
- **Privacy policy:** [https://calcspec.com/app-privacy.html](https://calcspec.com/app-privacy.html)

## Description

3-ton AC on an 1,800 sq ft Zone 4 house - oversized? Sensible plus latent BTU/h and tonnage by the Manual J simplified method, 7 IECC zones. $4.99 one-time, no login.

ManualJ Lite is a fast, offline HVAC load calculator based on the Manual J simplified method. Enter your building details and instantly get cooling and heating load estimates for proper equipment sizing.

WHAT IT CALCULATES:

Cooling Load:
- Sensible and latent cooling loads (BTU/h)
- Total cooling capacity required
- AC tonnage recommendation
- Load breakdown by component

Heating Load:
- Total heating BTU/h
- Heat loss through walls, windows, roof
- Infiltration losses
- Recommended furnace capacity

BUILDING INPUTS:

- 7 IECC climate zones (Zone 1 through Zone 7)
- Floor area in square feet
- Insulation quality (Poor, Average, Good, Excellent)
- Window type (Single, Double, Low-E Double, Triple)
- Number of stories and orientation

KEY FEATURES:

- Simplified Manual J calculation method
- Cooling and heating mode toggle
- Component-level load breakdown percentages
- Instant results as you adjust inputs
- Clean, easy-to-read results layout
- Works completely offline
- No account or login required

BUILT FOR HVAC TECHS:

Whether you are an HVAC technician, contractor, or homeowner planning a system upgrade, ManualJ Lite gives you quick load estimates for equipment sizing. Select your climate zone, enter building specs, and get BTU and tonnage results in seconds.

Covers all 7 IECC climate zones with appropriate design temperatures for accurate residential load calculations.

## Rankings

- #2,191,729 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6761507693)