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What is the best source to download AHU graphics for building automation projects?

November 18, 2025

When you’re designing a building automation system (BAS) dashboard or interface and you need equipment visuals—especially for air handling units (AHUs)—knowing the right source for graphics can save you hours of design effort. In my view, the best source for AHU graphics combines three key elements: quality, relevance to BAS/HVAC systems, and easy integration. Based on those criteria, I recommend starting with a few top-sources.

One of the best sources is the ASI Controls Graphics Library, which offers direct download packages for AHUs, VAVs, chillers, and related HVAC equipment layouts. Their graphics are organized in downloadable “GFX packages” and include AHU components, ducting modules, sensors and more. The fact you can select “AHU” or “VAV” and drill down into exact sub-components makes it highly useful for BAS integration.

Another excellent option is the free HVAC graphics library from Open Automation Software. They provide over 2,500 2D and 3D HVAC symbols—including boilers, heat-pumps, ducting and AHUs. Because it is free and covers a broad range of equipment, it’s great for getting started and for smaller or mid-size BAS projects.

For higher-end, scalable graphics with polish and professional visuals—especially if you want vector or animated components—the service from QA Graphics is very strong. Their “Vector Symbol Library” includes AHU equipment, terminal units, animations, and is optimized for modern BAS platforms. While this may not always be totally free, it offers premium quality for when visuals and branding matter.

My Recommendation (Summary)

  • Best free/broad starting point: Open Automation Software library.
  • Best specialist AHU-component downloadable source: ASI Controls Graphics Library.
  • Best premium/graphics-rich source: QA Graphics Vector/ V5 Symbol Library.
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