HVAC TOOLS FEATURES
· Automates 13 Common HVAC Design Tasks
· Follows ASHRAE and NEC Procedures
· Sizes Round and Rectangular Duct Sections
· Sizes Wire Based on Ampacity and % Voltage Drop
· Sizes Pipes and Refrigerant Lines
· Performs Fan Curve and Cost Analysis
· Performs Mixed Air and State Point Psychrometrics
· Performs Three Way Interpolation of HVAC Units
· Automatic U-Factor Calculations for Roofs, Walls, etc.
· Hot and Chilled Water Pipe Sizing and Analysis
· High and Low Pressure Natural Gas Pipe Sizing
· Quick Look-Up of Common HVAC Formulas
· Provides Comprehensive and Concise Reports

The Elite Software HVAC Tools program allows the quick calculation of 13 common HVAC design tasks. These tasks include duct sizing, wire sizing, three way coil interpolation, mixed air and state point psychrometrics, fan curve and cost analysis, U-Factor calculations, natural gas pipe sizing, refrigeration line sizing, general pipe sizing, hot/chilled water pipe analysis and the quick look-up of common HVAC formulas and conversion factors.

HVAC Tools is designed to be used as a quick utility for calculating these common tasks. Minimal input is required for each function and results are instantly displayed on the same screen as the input data. Some of the functions in HVAC Tools are also covered by other Elite programs. For example, duct sizing is done on a system wide basis for multiple duct sections at a time in DUCTSIZE.

The Tools program just sizes one duct at a time in order to minimize the data entry required. The same situation exists with psychrometrics, pipe sizing, and wire sizing. Elite has other programs you may want to consider that address those applications on a complete system basis. HVAC Tools is a simple and easy to use Windows programs designed for both engineers and contractors. A lower priced DOS version of Tools is also still available.

PROGRAM INPUT
The HVAC Tools program is a true Windows program and as such it operates in standard Windows fashion complete with toolbars and hyperlinked help All input data is checked at the time of entry so that no improper data can be entered. Each function of Tools requires only one screen of input data. Most functions require only a few items of input data. Others, like the HVAC Formula look-up, require almost no input data.The Duct Size function, for example, requires the length of the duct, the cfm of air carried by the duct, the desired pressure loss per 100 feet of duct, and the material of the duct.

There is also provision for entering height and width constraints along with minimum and maximum velocity constraints. The Refrigeration Line Sizing function requires refrigerant type, tonnage, temperatures, pipe lengths and type.The Psychrometric function requires only two conditions to determine all other properties of air for a given state. The Fan Curve Analysis only requires any two of the following inputs: fan rpm, cfm, static pressure, or brake horsepower. The Wire Sizing function requires the load in either amps, horsepower, or kva. Given the voltage, wire length, material (aluminum or copper) and conduit type, Tools sizes the smallest wire that does not exceed NEC ampacity ratings or the user specified allowable % voltage drop.

PROGRAM OUTPUT
Output information from HVAC Tools can be seen on each input data screen and printed whenever desired. There is also provision for printing a cover sheet for the output report of any function of HVAC Tools. Shown below are sample input screens with output data for several functions.

CALCULATION METHOD
All HVAC related items in the HVAC Tools program follow the methodology described in the 1997 ASHRAE Handbook of Fundamentals. The wire sizing procedures are based on the 1997 National Electric Code. All results computed by the HVAC Tools program can be easily verified by hand.