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Cooling / Heating Load Software


HAP (Hourly Analysis Program) ($1495 US / $2050 Canadian)
HAP is a dual function program - full-featured load estimating and system sizing for commercial buildings plus versatile hour-by-hour energy and operating cost analysis. Thermal loads are calculated using the ASHRAE-endorsed Transfer Function load method. System components are sized using the System-Based Design concept, which applies the ASHRAE-endorsed Heat Extraction Methodology to link system performance to building thermal loads. Energy analysis uses full 8760 hours-per-year analysis to evaluate the operation of a wide variety of air handling and plant equipment. Operating costs are computed based on energy use and demand charges. A wide range of tabular and graphical outputs is available.



System Design Loads ($795 US / $1090 Canadian)
Design load estimating and system sizing for commercial buildings. Load calculations use ASHRAE-endorsed Transfer Function methodology. System components are sized using the System-Based Design concept, which applies the ASHRAE-endorsed Heat Extraction Methodology to link system performance to building thermal loads. Specific system and component sizing for a wide variety of air-handling system types, with up to 100 zones per system. Includes a wide variety of graphical and tabular outputs



Block Load for Windows ($495 US / $680 Canadian)
Full-featured design load estimating program for commercial buildings. Combines easy-to-use operation with fast, accurate load calculations. Efficient tool for sizing HVAC systems and equipment. Uses ASHRAE-endorsed Transfer Function load method. Suitable for both single and multiple-zone projects. Includes graphical output of both weather and psychometric data.


TRACE™ 700 Load Design Comprehensive load design made easy

Load Phase
The Load phase of the program computes the peak sensible and latent zone loads, as well as the block sensible and latent loads for the building. In addition, the hourly sensible and latent loads, including weather-dependent loads, are calculated for each zone, based on the weather library.

Design Phase
The Design phase of the TRACE program calculates the design supply air temperatures, heating and cooling capacities, and supply air quantities given the peak load files generated by the Load phase. For applications where the building design parameters are known, you can override the calculation of these values using optional entries to the System phase. This gives you the ability to simulate existing buildings with installed equipment that may not be sized according to the loads calculated in the Load phase



TRACE™ 700 Load Express Light commercial load analysis in a snap .

TRACE 700 Load Express is exactly what its name implies: a quick-and-easy software application that calculates cooling loads, heating loads, and airflow capacities using ASHRAE-approved algorithms. Combine the intuitive Microsoft® Windows-based interface with entries geared specifically for small to medium-sized light commercial buildings and the result is an incredibly short learning curve. TRACE 700 Load Express lets "rookies" and experienced users alike perform accurate load calculations in minutes with just five simple steps:

1. Select a weather profile.
2. Define templates.
3. Enter room parameters.
4. Describe the air-handling system.
5. Assign rooms to systems.


HVAC-Calc Residential

Easily calculates both Heat Loss and Heat Gain
Explains how to size Furnaces and Air Conditioners
Includes Duct Sizing and Hot-Water Baseboard sizing
Clear uncluttered screens for entering house information.
Simple, just follow the on screen numbered steps



Commercial HVAC "ASHRAE" Loads

Chvac quickly and accurately calculates the maximum heating and cooling loads for commercial buildings. The cooling loads can be calculated with either the CLTD method or the new RTS (Radiant Time Series) method. The program allows an unlimited number of zones which can be grouped into as many as 100 air handling systems. Chvac automatically looks up all cooling load and correction factors necessary for computing loads. In addition, it can look up outdoor design weather data for over 2000 cities located around the world. There is also provision for editing the weather data as well as adding data for other cities. Comprehensive reports list the general project data, detailed zone loads, air handler summary loads, outside air loads, total building loads, building envelope analysis, tonnage requirements, CFM air quantities, chilled water flow rates (if applicable), and complete psychrometric data with entering and leaving coil conditions. Other outstanding features include ASHRAE Standard 62 analysis, automatic building rotation, 360 degree wall orientations, tilted glass, exterior shading, internal operating load profiles, variable indoor design temperatures, people diversity, pretreated outside air, seasonal infiltration and ventilation rates, reheat loads, duct gains and losses, and return air plenums. Chvac project data files can also be used by Elite Software's EZDOE energy analysis program.

Calculates Peak Heating & Cooling Loads
Determines Building Tonnage and Room CFM Requirements, and Runout Duct Sizes
Uses either the RTS or CLTD calculation method
Computes CFM Air Quantities With Psychrometrics
Calculates from Manually Entered Data or Directly from Floor Plans Created with Drawing Board
Links with Elite Software's Energy Audit and EZDOE Energy Programs
Transfers data to the eQUEST and PowerDOE Energy Analysis Programs
Allows 30 Walls, 30 Windows, and 12 Roofs per Zone
Automates Compliance with ASHRAE Standard 62
Calculates in both Metric and English Units
Converts any project from English to Metric units and vice-versa
Allows Simultaneous Infiltration and Ventilation
Calculates Runout and Main Trunk Duct Sizes
Selects Equipment from ARI/GAMA Databases
Allows Virtually Unlimited Number of Zones
Zones May be Optionally Grouped Under VAV Boxes
Prints Numerous Color Pie Charts and Bar Graphs
Creates Spreadsheet Output File

Free chvac download (limited functional demo)




Residential HVAC "Manual J" Loads

The Elite Software RHVAC Program quickly and accurately calculates peak heating and cooling loads for residential and small commercial buildings in accordance with the eighth edition of the ACCA Manual J. The Heat Transfer Multipliers (HTM values) for all the walls, windows, doors, and roofs listed in Manual J are stored and automatically looked up by the program as needed. Although HTM values are taken from Manual J directly, the user does have the option of entering his own U-Value for each wall, roof, or glass section so that a modified HTM value is used. Design weather data for over 1500 cities is built-in to the program. In addition, the user can revise the existing weather data and add additional weather data as desired. Zoning cfm adjustments are automatically handled by the program as needed. Other outstanding features include exterior glass shading, ventilation air, miscellaneous latent loads, default room data, automatic rotation of the entire building, hydronic heat calculations and much more.


Commercial Building HVAC Loads

This Software provides Heating and Cooling Loads for Commercial buildings using ASHRAE methods. Fast C++ performance for efficient "qwick" load calculation results. Windows-based user interface is grid-intensive.

Free Trial Downloads
C++ Performance Construction
ASHRAE TFM Calculation Methods
Zone Grids and Zone Tree View feature
System Calcs with ERV Option for Outside Air
Weather Files may be customized
Windows 98,2000,NT,XP
See Our Prices !
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Loadsoft 4.0,CARMEL

Loadsoft 4.0 is a commercial and institutional HVAC load calculation software package. It calculates peak heating and cooling loads for purposes of sizing air-conditioning and heating equipment. The calculations in this software program are based upon the 1993 ASHRAE Fundamentals heating and cooling load equations. In this new version, we have incorporated many of your suggestions, and have offered many improvements and enhancements over the previous versions of Loadsoft. The following is a list of the many enhancements to Loadsoft 4.0:

Basic Features
True 32-bit power: Loadsoft 4.0 is truly a 32-bit software program, taking advantage of the improved processing and network power. It runs only on Windows 95/98 and NT 4.0.
2000 zone and system limit: You may input up to 2000 zones and systems, more than enough for most users.
Improved user-interface: Includes a much improved user-interface.
Wall, Roof, and Window Angles: Includes inputs for wall, roof, and window angles. Therefore, you may calculate loads for angled walls and roofs.
Search Capabilities: You may now search for zones and systems by certain criteria. In addition, you may filter unneeded zones and systems, until you are ready to use them.
Improved Graphing: Includes much-improved graphing capabilities. You may now graph the zone outputs and breakdowns with pie, line, bar, and area charts.
Output Customization: You may now truly customize outputs by setting margins, fonts, and headings.
Exporting Capabilities: You may now export both input and output results to a variety of popular formats, including: Microsoft Access, Microsoft Excel, Internet, and HTML.

ZAC's Cooling Load Calculation Program

ZAC's Cooling Load Calculation Program is software created for use by consultants, contractors, and designers alike for determining the cooling and heating loads of simple as well as complex building structures.

Based on the latest Cooling Load Calculation procedure by the American Society of Heating Refrigeration and Air-conditioning Engineers (ASHRAE) , the Radiant Time Series - RTS, is a new method derived from the Heat Balance method. It replaces all other non-heat-balance procedures i.e. TFM, CLTD, TETD. The RTS method is based on 24-hour time series which distribute heat gain over time to account for time delay effects. Series coefficients which are called Radiant Time Factors and Conduction Time Factors are derived from the heat balance method


ComfortAir® HVAC Software 3.3

Commercial Edition
Heating and Air Conditioning Hourly Load Analysis Program

For Windows 95/98/NT/2000/XP

The ComfortAir HVAC Software was designed to be used by engineers, architects, contractors and energy auditors for calculating, assessing and analysing heating and air conditioning loads in commercial buildings.

Input and output units can be set independently to English or Metric units.

Database contains weather data and other necessary data from 1,071 weather stations in 110 countries throughout the world, thus making the software applicable to virtually any city or locality in the world.

The ComfortAir HVAC Software is very user-friendly and powerful. All project data entries and other routine tasks such as U-value calculation, are carried out using wizards and dialogs. This ensures accuracy, completeness and unbelievable ease in using the product.

Whether you just need to have a summary report for peak conditions, or you require more indepth information for elaborate project analysis and design, ComfortAir HVAC Software will deliver what you are looking for. With Version 3.2 or later, you can now copy ComfortAir output tables and reports, and paste them into other Windows applications such as Excel and Word, for further processing and documentation


Commercial Load Software

Right-N is quick to learn, easy-to-use and strong enough to compute loads for 98% of the commercial buildings worldwide. Right-N 98 features unlimited zones and ASHRAE's 1997 international weather database, which lists up to 129 countries. Windows features include pull-down menus, graphic pie charts, colored screens, and custom reports by OLE links to Microsoft Word(TM). Also features metric and US units, with conversion capability between the two units, drag and drop zoning, full psychrometrics, return air plenums, color pie charts showing energy use, and the latest ASHRAE tables for heat gains and ventilation