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.

Prints Numerous Color Pie Charts and Bar GraphsĬhvac quickly and accurately calculates the maximum heating and cooling loads for commercial buildings.

Rooms May be Optionally Grouped Under VAV Boxes.

Allows Virtually Unlimited Number of Rooms.

Selects Equipment from ARI/GAMA Databases.

Calculates Runout and Main Trunk Duct Sizes.

Allows Simultaneous Infiltration and Ventilation.

Converts any project from English to Metric units and vice-versa.

Calculates in both Metric and English Units.

Automates Compliance with ASHRAE Standard 62.

Allows 30 Walls, 30 Windows, and 12 Roofs per Room.

Transfers data to the EnergyPro and eQUEST programs ( more on using eQUEST with Chvac).

The Ps圜hart program can import Chvac system data directly into its Air Handler Model window.

New! Allows Different Indoor Conditions for each Room.

Calculates from Manually Entered Data or Directly from Floor Plans Created with Drawing Board (sold separately).

Computes CFM Air Quantities With Psychrometrics.

Chvac complies with the ANSI/ASHRAE/ACCA Standard 183-2007.

Uses either the RTS or CLTD calculation method.

Determines Building Tonnage and Room CFM Requirements, and Runout Duct Sizes.

Calculates Peak Heating & Cooling Loads.

Last thing: I really enjoyed the way you defined the zones.

So after all this, i thing i carched here 2 bugs: A faulty attribute report and a conditional input that fails the HVAC component. Hope it is not important for your calculations. The other thing is that the HB_OSHVACSystems/ seeHVACDesc input fails the component when set to True. This can be fine but as a default i would say that it isn’t. See red arrows comparing this output with the one from anh HBZones output. Even though the HB_LabelZones attribute is saying that all are closed. The so so ones: some of your zones are open breps.

The previous component version didn’t check that.

You wrote “annually” and it should be “annual”. I would bet that the error in your file was the timestep in the HB_EPOutput. I updated the file to the last version from the github.

Equest Weather Files Download