Excel-based, machine learning-enhanced calculator suite for HVAC and hydronic design

<aside> ⚡

5× faster workflows | 95%+ accuracy | Professionally packaged for engineers

</aside>

This is the visual companion to my technical repository.

🔗 GitHub Repository: github.com/dominickfemia/hvac-toolkit

📌 Project Overview

The HVAC Engineering Toolkit is a professional-grade suite of Excel-based calculators designed to streamline HVAC and hydronic system design. It consolidates multiple engineering workflows into a single protected workbook with a consistent user interface.

The toolkit was built to address a common problem in HVAC design: engineers and interns often spend excessive time referencing charts, interpolating data, and repeating manual calculations. By embedding proven methods and empirical data into an easy-to-use Excel environment, this tool reduces the friction of early-stage design and educational training.

Useful for:

• Practicing engineers who need quick, reliable sizing estimates
• Interns and junior engineers learning HVAC workflows
• Design teams standardizing calculation practices across projects

Included modules & features:

• Four dedicated calculator modules (duct, pipe, fan, pump)
• A toggle between classical formulas (Churchill approximation) and a machine learning model (XGBoost regression trained on empirical data) for friction factor estimation
• Built-in validation checks and error messaging to guide proper use
• A full PDF User Guide with instructions, references, and version log

<aside> 📊

Impact: By replacing manual lookup tables and hand-drawn Moody charts with an automated system, the toolkit enables faster iteration, fewer mistakes, and clearer documentation.

</aside>

🔑 Key Features