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DFD Library System

Use the Data Flow Diagrams solution from the Software Development area of ConceptDraw Solution Park to draw your own context-level DFDs using the ConceptDraw DIAGRAM diagramming and vector drawing software.
This HVAC schematics sample was redesigned from the Wikimedia Commons file: Ventilation unit with heat pump & ground heat exchanger.png. [ wiki/ File:Ventilation_ unit_ with_ heat_ pump_ %26_ ground_ heat_ exchanger.png]
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. [ licenses/ by-sa/ 3.0/ deed.en]
"Heat recovery ventilation, also known as HRV, mechanical ventilation heat recovery, or MVHR, is an energy recovery ventilation system using equipment known as a heat recovery ventilator, heat exchanger, air exchanger, or air-to-air heat exchanger which employs a counter-flow heat exchanger (countercurrent heat exchange) between the inbound and outbound air flow. HRV provides fresh air and improved climate control, while also saving energy by reducing heating (and cooling) requirements.
Energy recovery ventilators (ERVs) are closely related, however ERVs also transfer the humidity level of the exhaust air to the intake air." [Heat recovery ventilation. Wikipedia]
The HVAC schematics example "Ventilation unit with heat pump and ground heat exchanger" was created using the ConceptDraw DIAGRAM diagramming and vector drawing software extended with the HVAC Plans solution from the Building Plans area of ConceptDraw Solution Park.
HVAC schematics
HVAC schematics, pump, multi fan section, heat exchanger, plate and tube, equipment,

pictures of people People

pictures of people
This solution extends ConceptDraw DIAGRAM software with samples, templates and libraries of vector clipart for drawing the People illustrations. Use it to make professional-looking documents, presentations and websites illustrated with color scalable vector c

hierarchy pyramid Pyramid Diagrams

hierarchy pyramid
Pyramid Diagrams solution extends ConceptDraw DIAGRAM software with templates, samples and library of vector stencils for drawing the marketing pyramid diagrams.