HVAC Ducts Handbook

HVAC design – combining comfort with efficiency When defining an HVAC installation, comfort is the most obvious primary consideration, as it is invariably the main reason for installing an HVAC system in the first place. As a first step the parameters that define comfort need to be identified – temperature, humidity, air replenishment  and   noise   levels   etc. These   then   need   to   be   regulated   to   deliver   the   perception   of comfort to the user.

However, this needs to be achieved with the rational and efficient use of energy, in turn saving natural resources, and also money at the local level. Furthermore, it is also vital to factor ‘safety’ into the design, since, irrespective of what and where, a ‘safe solution’ is the only solution The air duct distribution network is an important component of HVAC installations, helping to significantly reduce energy costs and reduce noise nuisance generated by the system’s equipment.

ISOVER solutions for HVAC – The safe option for saving energy and providing comfort ISOVER provides solutions for HVAC ducts and pipes in glass wool, stone wool and ULTIMATE mineral wool, which help not  only to deliver desired levels of comfort  but  also both reduce energy consumption  and  contribute  significantly to fire safety.
ISOVER  solutions   provide   possibly   the   best combination of thermal and acoustic comfort, energy efficiency and safety for the user.

Contents
1.  INTRODUCTION
2.  AIR DUCTS AND INSULATION SOLUTIONS
2.1.  Metal Ducts
2.2. Glass wool ductboards CLIMAVER
2.3. Plastic ducts
2.4. Flexible ducts
3.  THERMAL INSULATION IN HVAC DUCT WORK
3.1.  Calculating insulation thicknesses
3.2. Thermal insulation of ducts
3.3. Condensation risks
4.  ACOUSTIC INSULATION IN HVAC DUCT WORK
4.1.  Origins and paths of sound transmission in installations
4.2. Solutions for installation noise
5.  FIRE PROTECTION IN HVAC DUCT WORK
5.1. Reaction to fire
5.2.  Fire resistance
6.  PRESSURE LOSSES I N AIR DUCTS
6.1.  Static, dynamic and total pressure
6.2. Pressure losses
7.  AIR QUALITY – THE ROLE OF HVAC DUCTS
7.1. Air ducts factors influencing IAQ
7.2.  Duct cleaning
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