HVAC Load Calculations Made Easy

Get fast, precise load calculations with HeatWise, our online HVAC load calculator. Made for mechanical engineering firms and consultants.

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What is HeatWise?

🚀 HeatWise is a load calculation software for mechanical engineering firms and consultants.
⚡ It is a modern alternative to traditional software like Carrier HAP, Elite CHVAC, and MiTek Wrightsoft.
🎯 Use HeatWise to calculate precise heating and cooling loads for both commercial and residential buildings.
☁️ Built with a web-based interface, HeatWise eliminates the complexity of traditional software while delivering accurate, ASHRAE-compliant results.

Why HeatWise?

Why choose HeatWise over competing software like Carrier Grade HAP, Elite CHVAC, or MiTek Wrightsoft? Here's what sets us apart.

Intuitive from Day One

Other software can take hours of training to get started. We were frustrated by this complexity and designed HeatWise to be different. With our built-in help system and intuitive interface, you can calculate results on the first day.

Fully Web-Based

Unlike competing software, HeatWise runs in your web browser. Avoid installation headaches, get automatic updates, and access your projects from any device. Seamlessly share projects between co-workers for collaboration.

Affordable Pricing

We know load calculations are just one part of your firm's work, so we made HeatWise licenses straightforward and affordable. We charge a simple monthly fee that may be cancelled any time.

Feature Comparison

See how HeatWise compares to other HVAC load calculation software on the market.

Software	Ease-of-use	Web Based	Schedules Import	Revit Import	Output Formats	Energy Modelling	Cost	Tech Support
HeatWise	⭐⭐⭐	✅	✅	❌	PDF Excel	❌	💲	⭐⭐⭐
Carrier HAP	⭐	❌	❌	✅	CSV PDF RTF	✅	💲💲💲	⭐
Trane Trace	⭐	❌	✅	✅	CSV PDF Word	✅	💲💲💲	⭐
Elite Chvac	⭐⭐	❌	❌	❌	CSV PDF Word	❌	💲💲	⭐
Wrightsoft Manual J	⭐⭐	❌	✅	❌	PDF Word	❌	💲💲	⭐

* Comparison based on publicly available information and user feedback as of 2025

Is HeatWise right for you?

HeatWise is designed for specific use cases. Here's how to know if it's the right fit for your projects.

HeatWise may be right for you if...

• You're a mechanical engineering firm or consultant doing load calculations
• You want software that's easy to learn and use from day one
• You prefer web-based tools that work on any device
• You need accurate, ASHRAE-compliant results for commercial or residential projects
• You want affordable, transparent pricing without long-term contracts
• You value responsive customer support and regular updates

HeatWise may NOT be right for you if...

• You need advanced energy modeling capabilities beyond load calculations
• You're required to use specific legacy software by clients
• You require direct Revit integration for your workflow
• You're working on very large, complex industrial facilities
• You need extensive customization of calculation methods
• You prefer desktop-only applications without internet connectivity

Still not sure? Try HeatWise free for 30 days to see if it fits your workflow.

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User Testimonials

HeatWise is increasingly being used by firms and consultants looking for a modern load calculator. Here are a few testimonials from our users:

"HeatWise has been a fantastic solution for our load calculations. We were looking for something that checked all of our boxes; cost friendly, easy to use, easy to access, great support, continuing to innovate/improve, and next level reporting and HeatWise checked them all. I have used multiple programs for measured load calcs, this is the best experience I have had! I have a had a few questions and even a feature request and they have been quick to respond and added the feature right away! Highly recommend HeatWise to other contractors and engineers!"

Tom, President at Omni Mechanical

Using HeatWise to calculate loads for commercial buildings.

"When our IT department restricted downloads of our outdated, unsupported load calculation software, HeatWise provided the perfect solution - its web-based platform eliminated approval bottlenecks and deployment hurdles while delivering straightforward, accurate calculations for our needs in an industry that has become unnecessarily complicated with new energy modeling platforms and different calculation methods."

Engineer at Tweet Garot

Using HeatWise to assist with commercial building load calculations.

"I used HeatWise to calculate heating/cooling loads for a fourplex project. I'm stunned by the user-friendliness, interface, and the graphics provided at the end of the calculation. I'll use HeatWise for my projects going forward and recommend it to HVAC engineers!"

Erdem, Engineer

Used HeatWise to calculate loads for an energy-efficient fourplex residential project.

Stop Struggling with Load Calculations

Let us take the headache out of load calculations for you. We designed HeatWise to be easy to learn and use so that you can get results fast.

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