#Ashrae psychrometric chart no. 1 in color video upgrade#
However, there is a generous upgrade policy. Each Chvac version is exactly the same with the exception of the room capacity and price. The maximum number of air handling systems allowed for any version is the number of rooms allowed or 100, whichever is the lesser. This allows Chvac to compute diversified peak loads at four levels in one run of the program: room, vav box (zone), air system, and total building. Rooms can optionally be grouped under vav boxes as well (zones). Keep in mind that a room is a single space, and that rooms can be grouped into air handling systems which in turn make up the building. There are five versions of the Chvac program 2 room capacity ($299), 10 room capacity ($399), 50 room capacity ($599), 100 room capacity ($999), and unlimited capacity ($1499). 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. Comprehensive reports list the general project data, detailed room 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. There is also provision for editing the weather data as well as adding data for other cities.
In addition, it can look up outdoor design weather data for over 2000 cities located around the world. Chvac automatically looks up all cooling load and correction factors necessary for computing loads. The program allows an unlimited number of rooms which can be grouped into as many as 100 air handling systems. The cooling loads can be calculated with either the CLTD method or the new RTS (Radiant Time Series) method.
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