Two-Pipe Unit
How It Works Four-Pipe Unit Two-Pipe Unit with Electric Heat Two-Pipe Unit

Advantages for the Building Owner
Advantages for the Contractor
Sequence of Operation


Room air is drawn through the return air grille and through the lower half of the riser heat-exchanger into the blower. It then blows through the upper half of the riser heat-exchanger from the double-tapered plenum on the blower discharge, after which the conditioned air returns to the room through the supply grille(s).

The two air passes through the finned coil surfaces are equivalent to a "four-row" heating/cooling coil.

 Two-Pipe Unit - Cool Two-Pipe Unit - Heat

 

Advantages of Building Owner


Elimination of brazed joints within the unit.

Lower maintenance (filter change only): No valves, permanently lubricated motor
Ground level maintenance: No ladders required.
Peachtree Plaza Hotel - Atlanta, Georgia

Lower pumping costs: Elimination of system resistance caused by valves trains, coils and runout piping.
Aesthetics: Drywall enclosure
Aluminum Grilles - No unsightly steel panels or access openings. All service can be performed through the grille openings.
Quiet Operation

 

Advantages of Contractor

Labor savings
Complete piping package included.
Risers are provided and factory installed in each unit.
No need for labor and material for runout piping from the unit to the supply/return riser.
No venting of individual units.
No balancing of individual units.
Plug-in thermostat - Surfaced mounted
Job site distribution simplified due to precise identification and labeling of each unit.


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