Contact Us

Get professional support for your HVAC load calculation needs. We're here to help with technical questions and assistance.

Get In Touch

Email Support

For all inquiries, technical support, and general questions, please email us at:

[email protected]

How We Can Help

Technical Support

Get help with our calculators, troubleshooting, and feature questions.

Load Calculation Guidance

Professional assistance with Manual J methodology and calculation best practices.

Feature Requests

Suggestions for new calculators, tools, or website improvements.

Partnership Inquiries

Business partnerships, integrations, and collaboration opportunities.

Before You Contact Us

Quick Resources

You might find the answer to your question in our resources:

→ Load Calculation Basics → Contractor Resources → Energy Codes Guide → Building Materials Guide

Popular Calculators

Residential Load Calculator→Commercial Load Calculator→Room-by-Room Calculator→Equipment Sizing Calculator→

Response Time

We typically respond to emails within 1-2 business days. For technical issues, please include as much detail as possible about the problem you're experiencing.