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<p>and maintain pressure relationships between spaces. The means of air delivery and removal from spaces is known as <a href="page.php?w=room_air_distribution">room air distribution</a>.</p>

<p><big> Individual systems </big></p>
<p>In modern buildings, the design, installation, and <a href="page.php?w=HVAC_control_system">control systems</a> of these functions are integrated into one or more HVAC systems. For very small buildings, contractors normally estimate the capacity and type of system needed and then design the system, selecting the appropriate</p><p>
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