Economizer: Hooded Propeller Fans with Mix, Recirculate, Supply and Exhaust Modes

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Economizer

Economizer

AMCA-Sound & Air Cert. logo

AMCA-Sound & Air Certified

Building ventilation requirements are often dictated by changes in the outside air temperature, production processes within a facility and / or occupancy within a facility. LOREN COOK COMPANY’s Economizer Fan offers the flexibility to maintain comfortable temperatures in factories, gymnasiums, equipment rooms, warehouses, manufacturing plants or other facilities with a high internal heat load. The mixing of cool outside air with warm inside air, “free cooling,” provides a more comfortable air temperature to any facility. It is the fan’s most economical function. The Economizer Fan can also recirculate inside air, supply cool outside air to a facility, or exhaust warm or contaminated air.

  • Steel curb cap with continuously welded corners and Lorenized™ fan finish.
  • 14 gauge galvanized steel plenum with two access doors.
  • Heavy duty galvanized steel control dampers.
  • Galvanized steel hood.
  • Bird screen.
  • Corrosion resistant fasteners.
  • Heavy duty steel power assembly with extruded aluminum propeller.
Related Documents

See the Downloads tab for specifications, submittals and FanDrafter files

  • MRS-D

  • MRSF-D

  • MRSE-D

  • Downloads

AC

Type Economizer Fan is furnished standard with UL 705 and CUL listing (Power Ventilator/ZACT) when furnished with factory supplied motor.


 

MRS-D 

Mix-Recirculate-Supply
Prop. Roof Fan

Description: Fan shall be hooded, roof mounted, direct driven, propeller economizer fan.

Operation Modes: Mix outside air with recirculated air, recirculate inside air, supply outside air.

Certification: Fan shall be manufactured at an ISO 9001 certified facility. Fan shall be listed by Underwriters Laboratories (UL 705) and UL listed for Canada (cUL 705).

Construction: The fan shall be of bolted and welded construction utilizing corrosion resistant fasteners. The hood shall be constructed of 18 gauge galvanized steel. The hood base shall be minimum 14 gauge Lorenized steel with continuously welded curb cap corners. The plenum shall be constructed of 14 gauge galvanized steel and provided with integral lifting lugs, propeller safety screen and two access doors. Outside air damper and recirculated air dampers shall be constructed of galvanized steel frame and blades. The motor shall be mounted to a minimum 14 gauge tubular steel power assembly. The propeller shall be located in a double venturi for efficient air flow in all modes of operation. Unit shall bear an engraved aluminum nameplate. Unit shall be shipped in ISTA certified transit tested packaging.

Propeller: Propeller shall be extruded aluminum airfoil design with cast aluminum hub. The blade pitch shall be factory set and locked using set screws and roll pin. The hub shall be keyed and locked to the shaft utilizing two set screws or a taper lock bushing. Propeller shall be balanced in accordance with AMCA Standard 204-05, Balance Quality and Vibration Levels for Fans.

Motor: Motor shall be Nema design B with class B insulation rated for continuous duty and furnished at the specified voltage, phase and enclosure.

Product: Fan shall be model MRSE-D as manufactured by LOREN COOK COMPANY of Springfield, Missouri.

Dimensions (Inches)

ACEd dimension drawing

Size  B Sq.  D Sq.  W Sq.  T Sq.  Material Gauge Roof Opening Square*  Approx. Ship Wt.-Lbs.
Base Hood  Plenum
24  60-1/4  31-1/2  18  22-1/4  26  59  37-1/2  14  18  14  32-1/2  635 
30  65-3/4  37-1/2  18  27-3/4  28  69  43-1/2  14  18  14  38-1/2  785 
36  71-1/4  43-1/2  18  33-1/4  29  80  49-1/2  14  16  14  44-1/2  910 
42  78-3/4  49-1/2  20  38-3/4  39  90  55-1/2  14  16  14  50-1/2  1125 
48  84-1/4  55-1/2  20  44-1/4  39  90 x 110  61-1/2  14  16  14  56-1/2  1480 
54**  89-3/4  61-1/2  20  49-3/4  42  109  67-1/2  14  18  14  62-1/2  1850 
All dimensions in inches. *Roof opening size for curbs supplied by Cook only. **Sizes 54 require field assembly of hood.
AC

Type Economizer Fan is furnished standard with UL 705 and CUL listing (Power Ventilator/ZACT) when furnished with factory supplied motor.


 

MRSF-D 

Mix-Recirculate-Filtered
Supply Prop. Roof Fan

Description: Fan shall be hooded, roof mounted, direct driven, filtered, propeller economizer fan.

Operation Modes: Mix filtered outside air with recirculated air, recirculate inside air, supply filtered outside air.

Certification: Fan shall be manufactured at an ISO 9001 certified facility. Fan shall be listed by Underwriters Laboratories (UL 705) and UL listed for Canada (cUL 705).

Construction: The fan shall be of bolted and welded construction utilizing corrosion resistant fasteners. The hood shall be constructed of 18 gauge galvanized steel. Filters shall be washable, 2 inch thick aluminum mesh type. The hood base shall be minimum 14 gauge Lorenized steel with continuously welded curb cap corners. The plenum shall be constructed of 14 gauge galvanized steel and provided with integral lifting lugs, propeller safety screen and two access doors. Outside air damper and recirculated air dampers shall be constructed of galvanized steel frame and blades. The motor shall be mounted to a minimum 14 gauge tubular steel power assembly. The propeller shall be located in a double venturi for efficient air flow in all modes of operation. Unit shall bear an engraved aluminum nameplate. Nameplate shall indicate design CFM and static pressure. Unit shall be shipped in ISTA certified transit tested packaging.

Propeller: Propeller shall be extruded aluminum airfoil design with cast aluminum hub. The blade pitch shall be factory set and locked using set screws and roll pin. The hub shall be keyed and locked to the shaft utilizing two set screws or a taper lock bushing. Propeller shall be balanced in accordance with AMCA Standard 204-05, Balance Quality and Vibration Levels for Fans.

Motor: Motor shall be Nema design B with class B insulation rated for continuous duty and furnished at the specified voltage, phase and enclosure.

Product: Fan shall be model MRSF-D as manufactured by LOREN COOK COMPANY of Springfield, Missouri.

Dimensions (Inches)

ACEd dimension drawing

Size  B Sq.  D Sq.  W Sq.  T Sq.  Material Gauge Roof Opening Square*  Approx. Ship Wt.-Lbs.
Base Hood  Plenum
24  60-1/4  31-1/2  18  22-1/4  26  69  37-1/2  14  18  14  32-1/2  635 
30  65-3/4  37-1/2  18  27-3/4  28  80  43-1/2  14  18  14  38-1/2  785 
36  71-1/4  43-1/2  18  33-1/4  29  90  49-1/2  14  16  14  44-1/2  910 
42  78-3/4  49-1/2  20  38-3/4  39  90 x 110  55-1/2  14  16  14  50-1/2  1125 
48**  84-1/4  55-1/2  20  44-1/4  39  109  61-1/2  14  16  14  56-1/2  1480 
54**  89-3/4  61-1/2  20  49-3/4  42  119  67-1/2  14  18  14  62-1/2  1850 
All dimensions in inches. *Roof opening size for curbs supplied by Cook only. **Sizes 48 and 54 require field assembly of hood.
AC

Type Economizer Fan is furnished standard with UL 705 and CUL listing (Power Ventilator/ZACT) when furnished with factory supplied motor.


 

MRSE-D

Mix-Recirculate-Supply-Exhaust
Prop. Roof Fan

Description: Fan shall be hooded, roof mounted, direct driven, propeller economizer fan.

Operation Modes: Mix outside air with recirculated air, recirculate inside air, supply outside air, exhaust inside air.

Certification: Fan shall be manufactured at an ISO 9001 certified facility. Fan shall be listed by Underwriters Laboratories (UL 705) and UL listed for Canada (cUL 705).

Construction: The fan shall be of bolted and welded construction utilizing corrosion resistant fasteners. The hood shall be constructed of 18 gauge galvanized steel. The hood base shall be minimum 14 gauge Lorenized steel with continuously welded curb cap corners. The plenum shall be constructed of 14 gauge galvanized steel and provided with integral lifting lugs, propeller safety screen and two access doors. Outside air damper and recirculated air dampers shall be constructed of galvanized steel frame and blades. The motor shall be mounted to a minimum 14 gauge tubular steel power assembly. The propeller shall be located in a double venturi for efficient air flow in all modes of operation. Unit shall bear an engraved aluminum nameplate. Nameplate shall indicate design CFM and static pressure. Unit shall be shipped in ISTA certified transit tested packaging.

Propeller: Propeller shall be a reversible, extruded aluminum airfoil design with cast aluminum hub. The blade pitch shall be factory set and locked using set screws and roll pin. The hub shall be keyed and locked to the shaft utilizing two set screws or a taper lock bushing. Propeller shall be balanced in accordance with AMCA Standard 204-05, Balance Quality and Vibration Levels for Fans.

Motor: Motor shall be Nema design B with class B insulation rated for continuous duty and furnished at the specified voltage, phase and enclosure.

Product: Fan shall be model MRSE-D as manufactured by LOREN COOK COMPANY of Springfield, Missouri.

Dimensions (Inches)

ACEd dimension drawing

Size  B Sq.  D Sq.  W Sq.  T Sq.  Material Gauge Roof Opening Square*  Approx. Ship Wt.-Lbs.
Base Hood  Plenum
24  60-1/4  31-1/2  18  22-1/4  26  59  37-1/2  14  18  14  32-1/2  635 
30  65-3/4  37-1/2  18  27-3/4  28  69  43-1/2  14  18  14  38-1/2  785 
36  71-1/4  43-1/2  18  33-1/4  29  80  49-1/2  14  16  14  44-1/2  910 
42  78-3/4  49-1/2  20  38-3/4  39  90  55-1/2  14  16  14  50-1/2  1125 
48  84-1/4  55-1/2  20  44-1/4  39  90 x 110  61-1/2  14  16  14  56-1/2  1480 
54**  89-3/4  61-1/2  20  49-3/4  42  109  67-1/2  14  18  14  62-1/2  1850 
All dimensions in inches. *Roof opening size for curbs supplied by Cook only. **Sizes 48 and 54 require field assembly of hood.