HeatWise HVAC HeatWise
FEATURES

Load Calculations Made Easy

HeatWise is designed to improve on similar software like HAP and Chvac. We have all the features you'd expect, with additional tools to make your life easier.

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Load Breakdowns

Intuitive Load Breakdowns

Use our web-app to calculate detailed load breakdowns for your residential and commercial building projects. Load breakdowns give a detailed picture of where the heating and cooling loads are coming from.

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ASHRAE

Based on ASHRAE Standards

Our calculations are based on the 2021 ASHRAE Fundamentals Handbook, using the Radiant Time Series calculation method. We calculate system cooling loads for each hour of one day of each month, for a total of 12x24 samples. We then find the peak loads and show a breakdown by component.

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Components

Full Component Breakdown

We support entering the following components for each space: ventilation, infiltration, walls, windows, doors, roofs, skylights, shadings, floors, partitions, buffer spaces, people, lighting, motors, appliances, and more. We have intuitive input forms for each one, and provide detailed load breakdowns by component.

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Components

Precise Solar Calculations

We use your location data to calculate the precise solar irradiance entering your building through windows and skylights. See detailed charts of solar irradiance throughout the day, and tweak your windows for maximum efficiency. We also support external and internal shadings, which may operate on a user-defined schedule.

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User Interface

Designed for Ease-of-Use

HeatWise is designed to be easy to use and learn, with a modern user interface. Many inputs, like ventilation, have an "automatic" mode where we can calculate the values for you based on your building's specifications. This saves you time digging through reference manuals and ASHRAE standards.

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Quick Help

Integrated Help System

Our integrated Quick Help system guides you through the input process. It provides in-app help for every page of the app so that you are never left guessing. Calculate loads start to finish without time-consuming and expensive training courses. We also provide detailed explanations of what calculations are being performed so that you can sanity-check results.

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Components

Location Data for the US, Canada, and More

Load ASHRAE weather-station data for locations across the world. Adjust any location data values to suit your needs. We use this data in our calculations to precisely estimate your building's outdoor temperatures and solar irradiance values throughout the year.

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Cloud Based

Entirely Online

Our software runs right in your browser, on any platform (Windows, Mac, Linux). This means no software to install, no updates to worry about, and no compatibility issues. Share your projects with co-workers across any device and platform. We manage access control to make sure two people cannot edit the project at the same time.

MORE FEATURES

Made for Professionals

Our load calculator is designed to meet the needs of today's engineering firms and consultants. You'll find familiar features from tools like HAP and Chvac, along with time-saving extras.

Built on ASHRAE Standards

Our calculations are based on the ASHRAE 2021 Fundamentals Handbook, an industry standard for HVAC load calculations.

Fully Web-Based

HeatWise runs right in your browser. No need to install software or worry about operating system support.

Quick to Learn

Get started immediately using our app's integrated help system. No need for extensive training or a huge manual.

Packed with Features

We handle ventilation/infiltration, walls, roofs, floors, windows, doors, skylights, shadings, buffer spaces, and more.

Actively Developed

HeatWise is under active development. We release new features almost every week, which you'll receive automatically.

Made for Teams

Give co-workers read and write access to your projects. Export results to Excel for further analysis.

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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