CHVAC FEATURES
· Calculates Peak Heating & Cooling Loads
· Computes CFM Air Quantities With Psychrometrics
· Calculates from Manually Entered Data or Directly from Floor Plans Created with Drawing Board · Allows 12 Walls, 12 Windows, and 5 Roofs per Zone
· Automates Compliance with ASHRAE Standard 62
· CHVAC Calculates in both Metric and English Units
· Allows Simultaneous Infiltration and Ventilation
· Calculates Runout and Main Trunk Duct Sizes
· Selects Equipment from AR/GAMA Databases
· CHVAC Allows Unlimited No. of Zones per Project
· Zones May be Optionally Grouped Under VAV Boxes
· Prints Numerous Color Pie Charts and Bar Graphs
· Spreadsheet Output File Compatibility
· Links with both AUDIT and EZDOE Energy Programs

The Elite Software CHVAC program quickly and accurately calculates the maximum heating and cooling loads for commercial buildings. CHVAC 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, the programs can look up outdoor design weather data for over 300 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.

There are five versions of the CHVAC program; 2 zone capacity ($295), 10 zone capacity ($395), 50 zone capacity ($595), 100 zone capacity ($995), and unlimited capacity ($1495). Keep in mind that a zone is a single space or room, and that zones can be grouped into air handling systems which in turn make up the building. Zones can optionally be grouped under vav boxes as well. This allows CHVAC to compute diversified peak loads at four levels in one run of the program: zone, vav box, air system, and total building. The maximum number of air handling systems allowed for any version is the number of zones allowed or 100, whichever is the lesser.

Each CHVAC version is exactly the same with the exception of the zone capacity and price. However, there is a generous upgrade policy. If at any time you decide to obtain a version of CHVAC with greater capacity than the original one you obtained, all that is required is to pay the difference in price between the two versions.

CALCULATION METHOD
CHVAC performs calculations using the CLTD procedures described in the ASHRAE Handbook of Fundamentals. The programs use exact CLTD and MSHGF table values where possible, otherwise direct calculations are made. This calculation technique allows the programs to calculate for any building orientation and still produce output results that can be easily verified by hand.

PROGRAM INPUT
CHVAC is a true Windows program that uses all the latest data entry techniques such as toolbars, hyper linked help, and form tabs. All input data is checked at the time of entry so that no improper data can be entered. Five types of data are requested: general project data, outdoor design data, building material data, air handler data, and specific zone data. The general project data includes the project and client name, designer, building opening and closing hours, internal operating load schedules, and any desired safety factors. The outdoor design data includes the summer and winter outdoor design conditions (automatically looked up for you if a city reference is given) and the desired ventilation and infiltration rates.

The building material data includes the definition of master building material types for roofs, walls, partitions, glass sections, and exterior shading. A user defined material library is available for saving the data on common material types. The air handler data includes the fan and terminal type, the desired heating and cooling supply air temperatures and data for duct heat gains and losses. The zone data includes the zone name, floor length and width, number of people, equipment watts, lighting watts, external shading data, and specific roof, wall, partition, floor, and glass data.

PROGRAM OUTPUT
The CHVAC program provides eleven types of reports which can be selectively previewed on screen or printed as desired. CHVAC supports all printers that work with Windows and numerous full color reports are available. The reports are: General Project Data, Air Handler Input Data, Zone Input Data, Detailed Project Zone Loads, Air System Zone Summary, Total Building, Air System, and Zone Load Profiles, Air System Total Load Summary, Air System Psychrometric Analysis, Overall Building Envelope Report, Pie Charts, Bar Graphs, and the Total Building Load Summary. Air system summary data can be exported to your favorite spread sheet. See the sample reports below.