Load Express

Load Express logo.

Calculates detailed HVAC load reports for heating, cooling and airflow capacities. Based on ASHRAE algorithms, you are assured of accurate results and valid designs.

The intuitive Windows graphical interface makes Load Express a powerful engineering tool with a very short learning curve. The "rookie" or experienced user can quickly and accurately perform load calculations for small to medium-sized light commercial buildings with confidence.

Create project files with Load Express in just 4 easy steps. Select a weather profile, enter simulation parameters, define the zones/rooms in the building and create air handler descriptions. Expandable, built-in libraries of building design parameters streamline your data entry time. Explore different design options using the "Alternative" feature.


Design, light commercial buildings, heating and cooling loads, HVAC



Expertise Required

Basic knowledge of HVAC equipment, systems, and terms.


Approximately 750 users worldwide.


Mechanical systems designers who size and calculate loads for HVAC systems.


Building design parameters and system configurations.


Print any of the 15 summary reports such as design cooling/heating loads (design capacities), psychrometric state points, and peak load summaries at building, air handler, or zone level.

Computer Platform

PC-compatible, 486 or higher (Pentium recommended), Windows 3.1 or higher, 16 MB RAM, 10 MB free hard disk space.

Programming Language

Visual Basic


The intuitive interface and simplified input methods, with the reliability of ASHRAE calculations, make this program both usable and accurate. Load Express lets you control the level of detail to enter and makes editing any specification painless.


With the program's focus on load calculations for small commercial jobs, it is limited to 20 zone and 20 system inputs.



Trane Company


3600 Pammel Creek Road
La Crosse , Wisconsin 54601-7599
United States


(608) 787-3926


(608) 787-3005






The cost for Load Express is $495 for a standard single license and $742.50 for a site/LAN license. Call the Support Center to receive special pricing for educational purposes or current promotional discounts. A yearly renewal fee of 25% of the purchase price entitles the customer to unlimited free phone support, as well as automatic updates and documentation. All Trane C.D.S. software programs have an unconditional 30-day money-back guarantee. "Patches" are also available for download from our web site, listed above. We offer on-site training at our headquarters in La Crosse, WI, as well as regional training at sites throughout the U.S. or at your office if you prefer. Contact the C.D.S. Support Center for more information. The C.D.S. department's Support Center is staffed by experienced HVAC engineers and specialists. Support Center hours are 8:00 AM-5:30 PM CT Monday-Thursday, and 8:00 AM-5:00 PM CT Friday.