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F-Chart
Active and Passive Solar Systems Analysis

F-CHART is the authoritative solar system analysis and design program written by S.A. Klein and W.A. Beckman, the originators of the F-Chart method. 

Download a demonstration version for Windows.

Collector Types
Flat-Plates
Evacuated Types
CPC's
1 and 2-Axis Tracking
System Types
Water Storage Heating
Pebble Bed Storage Heating
Building Storage Heating
Domestic Water Heating
Integral Collector-Storage DHW
Indoor and Outdoor Pool Heating
Passive Direct-Gain
Passive Collector-Storage Wall
Features
Life-cycle economics with cash flow
Weather data for over 300 locations
Weather data can be added
Monthly parameter variation
2-D incidence angle modifiers
English and SI units
Approved for use in California
Versions for Mac, DOS, and Windows

Sample Screens from F-Chart for Windows

Parameter Input Screen for Flat-Plate Collector


Parameter Input Screen for General Solar Heating System


Thermal Output Screen


Graphical Output Screen showing Solar vs. Month


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