Online educational resource on achieving indoor environmental quality with radiant based HVAC systems
Not for profit educational resource on indoor environmental quality.
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educational programs on indoor environmental quality

The Interaction and Connection between Buildings, HVAC System, and Indoor Environmental Quality
Copyright (C) 2013, Robert Bean, R.E.T., P.L.(Eng.), Healthy Heating and content contributors, All world rights reserved

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ABSTRACT: In reviewing literature representing thermal comfort, indoor air quality, building performance and HVAC, it is apparent that a central temperature of 77.5F+/- 22.5F (25C+/- 12.5C ) is common to the highest performing buildings delivering the highest indoor environmental quality. This range captures temperatures of the human body whilst enabling peak efficiency from mechanical systems. Within this zone there is also a reduction in entropy and a facilitation of exergy efficiency with renewable resources; a reduced breakdown of building materials, and improved perceptions of thermal comfort and air quality. The literature review also showed that the closer the operating temperatures of non-human elements (e.g., radiator, dry-bulb, boiler, heat pump temperatures) to the central temperature the more it benefited the human element from an environmental health and operating cost perspective. It also showed temperatures further away from the center core the lesser the thermal efficacy, energy and exergy efficiency. Additionally, the greater spreads demonstrate more entropy and additional risks to health and safety. Each element around this central temperature has been sequenced into a proposed chart (Figure 1.) which could be used by industry to show how factors within indoor environmental quality (IEQ) and the building technologies that control or otherwise affect it are interactive and connected.

Sidebar: readers of the paper and slides should quickly note how vitally important low temperature hydronic heating and high temperature hydronic cooling systems are to sustainable quality indoor environments.

Password protected: The files are password protected and available to ASHRAE IAQ 2013 (Tech Program) attendees and members of our IEQ Linked-In discussion group.

Instructions (read and follow carefully):

  1. Download paper and download slides (9mb file - save to desktop)

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  3. Follow up to an existing request or start a new thread with this text, "please send me the password for the ASHRAE IAQ 2013 Conference at this URL <>"

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Monitor the ASHRAE Bookstore for notifications of proceedings publication where you can obtain all the papers. Well worth the investment!


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