OPTIONAL RECIRCULATION DUCT UPGRADE

An upgrade allowing the proportion of recirculated air to be varied and its effect on energy requirements for air conditioning to be investigated. Additional psychrometric measuring points allow the enthalpy of two mixed air streams to be studied.

• 250 mm diameter fast clamp
• 250 mm spigot plate
• 250 mm 2-part duct suspension bracket
• Fan inlet duct support bracket
• Air inlet duct assembly
• Return duct (length 2 m)
• Exhaust duct assembly
• Fan inlet duct assembly
• Volume control assembly
• Type K thermocouples
• Inclined manometer: 0–12.5 mm WG with manometer fluid