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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 77.5°F+/- 22.5°F (25°C+/- 12.5°C ) 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.
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