---
title: HVAC Load Calculator
emoji: 🔥❄️
colorFrom: blue
colorTo: indigo
sdk: streamlit
sdk_version: 1.32.0
app_file: app.py
pinned: false
---

# HVAC Load Calculator

A modern web tool for calculating HVAC cooling and heating loads based on the ASHRAE method.

## Features

- **Separate Calculators**: Independent cooling and heating load calculators
- **Step-by-Step Input Forms**: Guided process with validation
- **Reference Data**: Comprehensive material properties and location data
- **Visual Results**: Charts and tables for load components
- **Smart Validation**: Proceed with warnings rather than blocking progress
- **Downloadable Data**: Export results for student assignments
- **ASHRAE Method**: Implementation based on industry-standard calculation methods
- **Extensible Design**: Framework for adding other calculation methods or locations

## How to Use

1. Select either the Cooling Load Calculator or Heating Load Calculator from the sidebar
2. Fill in the required information in each step
3. Review any warnings that appear (you can proceed with warnings)
4. Calculate results and analyze the output
5. Export results for your assignments

## Cooling Load Calculator

The cooling load calculator helps determine the amount of heat that needs to be removed from a space to maintain comfort conditions. It accounts for:

- Conduction through building envelope
- Solar radiation through windows
- Internal heat gains (people, equipment, lighting)
- Infiltration and ventilation

## Heating Load Calculator

The heating load calculator helps determine the amount of heat that needs to be added to a space to maintain comfort conditions. It accounts for:

- Conduction through building envelope
- Infiltration and ventilation
- Annual heating energy requirements based on heating degree days

## Technical Details

- Built with Python and Streamlit
- Modular design for extensibility
- Comprehensive reference data based on ASHRAE standards
- Visualization using Plotly
- Data export in CSV and JSON formats

## Educational Purpose

This tool is designed for educational purposes to help students understand the factors that influence HVAC load calculations. It provides a practical way to apply theoretical knowledge and see how different building parameters affect heating and cooling requirements.

## Acknowledgements

Based on ASHRAE calculation methods for heating and cooling loads.