Air Handling Units

Grad brand air handling units cover vertical (air volume from 2000 ~ 60000m3 /h), horizontal (air volume from 2000 ~ 60000m3/h), and ceiling-type (air volume from 1000 ~ 16000m3/h) three series.

Features
frame structure:
Aluminum framework structure is adopted, which is made of high-strength aluminum alloy. Each corner of the framework is made of special castings, allowing the section bar to plug into it. This structure performs well in mechanical strength. It is also light in weight, corrosion resistance, and decorative shape as well as having accurate size.
Panel structure:
A: The panel is formed by two layers of colored steel plates. Filler between the layers is high-density polyurethane or polystyrene, which has a better performance in thermal isolation than other materials like glass wool.
B: Panels are fixed in a special way, with sealing material to strengthen its thermal and air resistance. This structure has the best performance in thermal isolation, noise reduction and intensity, so it can be used in places require high quality of air.
Fan, electrical motor:
A: Unit adopts double suction centrifugal fan. Each fan motor assembly is dynamically balanced.
B: With ball bearings sealed, and functions of pre-lubricating, self-aligning, self-locking, automatic thrust, etc., the fan is maintenance-free in normal use.
C: Fans of a small model unit are driven directly by external sub-motor, no belt, and easy to maintain.
Filter: Unit filter is coarse plate. Filter material is cleanable convex Nylon net.
Cooler: The selected parameters of surface air cooler are designed by CAD/coi1 software. A standard cooler normally has copper pipes of φ 6. It is tightened by an overall rise up of brass strung by corrugated aluminum fin tubes. Staggered copper pipes have good heat transfer performance, low airflow resistance and superior corrosion resistance, ensuring the cooler has a higher heat transfer coefficient and a longer life.