HVAC Engineering Academy

Fresh Air Handling Unit (FAHU) with Energy Recovery – Smarter Cooling for Hot Climates

In regions like the Middle East, summer outside air can reach 46°C. Introducing 100% fresh air directly into a building at this temperature places a huge load on the cooling plant.

A Fresh Air Handling Unit (FAHU) equipped with an Energy Recovery Unit (ERU) recovers energy from the cooler exhaust air and preconditions the incoming fresh air – dramatically reducing cooling demand.

🔹 How It Works (as shown in the diagram)

Supply Air Inlet (Fresh Air): 46°C

Exhaust Air Inlet (Toilet/General): 24°C

After Energy Recovery: Fresh air reduced to ~34.3°C before the cooling coil

Exhaust Air Outlet: ~35.7°C (heat transferred to exhaust stream)

Off Coil / Supply Air Outlet: ~13–14°C (conditioned air supplied indoors)

This sensible heat transfer lowers the fresh air temperature by 10–15°C before it reaches the cooling coil. As a result:

✅ Lower cooling coil load
✅ Reduced chiller capacity
✅ Lower operating cost
✅ Enhanced indoor air quality with 100% fresh air

🔹 Why It Matters

Significant energy savings in high ambient conditions

Improved IAQ with sustainable operation

Smaller plant sizing & better lifecycle cost

Fresh Air Handling Units with Energy Recovery are not just an option—they’re a necessity in hot climates for balancing comfort, IAQ, and efficiency.

To know more visit our profile on Heyllink:

HeyLink.me | Hvac_Engineering

Explore our web.

HeyLink.me | Hvac_Engineering

Fire Pump Room

HVAC Pumps

AYVAZ
Fan Coil Unit Connection Hose

Khansaheb Facilities Management is thrilled to announce that we have been awarded a prestigious contract to provide Total Facilities Management services for the Royal Consulate General of Saudi Arabia in Dubai.

This partnership will see us take charge of technical maintenance, cleaning services, and specialized in-house and subcontracted services for the consulate and the Consul General’s residences.

Our people’s dedication to excellence and commitment to delivering top-notch service led us to this incredible achievement.

Compressor Parts #compressor #hvac #hvacengineering #hvacacademy #hvacengineering

Who has worked on this chiller? What was capacity?

Valve symbols..