Starting with the development of the first zoning dampers and registers in the 1950s to today, with exclusive Plug & Play dampers  Zonefirst has led the way in excellence and continued innovation.
ZONEFIRST is the first company that successfully developed and marketed HVAC Zoning Systems back in the 1950s and is today a leading manufacturer of HVAC zone dampers and zoning systems. Several other major zoning companies are in business due to ZONEFIRST.
It was in the mid to late 1950s when Richard Foster developed the first automatic motorized dampers, registers and difusers that were thermostatically controlled. He marketed these products under the trade name Zone-A-Trol with another company when in 1964 he founded Trolex Corporation and the start of the well known trade name Trol-A-Temp. In 1999 the Trol-A-Temp brand was acquired by Honeywell.
Since that time, Trolex has continued to manufacture zone dampers for a number of OEMs. In 2004 Trolex re-entered the HVAC market as ZONE-A-TROL and later the ZONEFIRST tradename. This new name signifies the many firsts the company has developed in the HVAC industry. We were the first company to develop automatic dampers, registers, and diffusers for zoning, centralized zone controllers, the first zoning system to feature normally open dampers and the first to zone heat pumps in the early 1970s

ZD20x10TZ Honeywell Home Square Parallel Blade 24 VAC

ZD20x8TZ Honeywell Home Square Parallel Blade 24 VAC

Starting with the development of the first zoning dampers and registers in the 1950s to today, with exclusive Plug & Play dampers  Zonefirst has led the way in excellence and continued innovation.
ZONEFIRST is the first company that successfully developed and marketed HVAC Zoning Systems back in the 1950s and is today a leading manufacturer of HVAC zone dampers and zoning systems. Several other major zoning companies are in business due to ZONEFIRST.
It was in the mid to late 1950s when Richard Foster developed the first automatic motorized dampers, registers and difusers that were thermostatically controlled. He marketed these products under the trade name Zone-A-Trol with another company when in 1964 he founded Trolex Corporation and the start of the well known trade name Trol-A-Temp. In 1999 the Trol-A-Temp brand was acquired by Honeywell.
Since that time, Trolex has continued to manufacture zone dampers for a number of OEMs. In 2004 Trolex re-entered the HVAC market as ZONE-A-TROL and later the ZONEFIRST tradename. This new name signifies the many firsts the company has developed in the HVAC industry. We were the first company to develop automatic dampers, registers, and diffusers for zoning, centralized zone controllers, the first zoning system to feature normally open dampers and the first to zone heat pumps in the early 1970s

ZD24x8TZ Honeywell Home Square Parallel Blade 24 VAC

Honeywell ZD24X8TZ

ZD8x16TZ Honeywell Home Square Parallel Blade 24 VAC

ZD8x18TZ Honeywell Home Square Parallel Blade 24 VAC

The ND Damper is constructed using Heavy Duty 0.80 extruded aluminum.

Nylon Bearings for quiet operation.

Overlapping parallel blade design insures low leakage.

Designed to operate at static pressures up to 1.5 w.c.

The UL Listed Motor Actuator is a 24 vac 3 wire power open/ power close type.

The motor actuator is rated at 18lbs. of torque. Superior to low torque Spring type motors.

The Motor Actuator housing has a NEMA1 Rating.

Integrated End-Stop Adjustment allows for a percentage of Relief Air (Leakage) to be set when the damper is powered to closed and/or you may set a maximum open position as well.

Bright green and red LEDs Indicate damper open and closed position.

AprilAire, our mission has always been to make homes healthy through intuitive design and professional-grade solutionsbecause healthy homes are the foundation for healthy people, families, and communities.

Healthy Living Everyone deserves to breathe Healthy Airno matter where you live or what your circumstances are

Simplicity by Design

Our Healthy Air solutions are designed to be intuitive, easy to use, and environmentally friendly.

Making a Difference

Our work is fueled by a passion for making a Healthy Air difference.

Real

We're committed to delivering real results through dedication to our customers and solutions that perform.

Aprilaire Zoned Comfort Control is designed for residential new construction and provides the components needed forsimple, reliable and profitable installs.

• Zone damper normally open; powers closed, allowing conditioned air to continue to flow if mechanical motor reaches end of service life.
  
  • Motor covered for improved appearance
    
    • Simplifies installationfewer wires to organize
      
      • Gasket material minimizes air bypass when blade is closed
        
        • All openings secured, preventing spray-in insulation from entering actuator
          
          • Simple, labor-saving design
            
            • Thumbscrew adjustable, no tools required
              
              • Simple, visual system check and troubleshooting,
                ,
                
                

International Comfort Products DAMPSLB10X10-B Zone Damper Slip-In 10" x 10" 3 Wire Bottom Mount

Internatinoal Comfort Procusts

ZoneDamper

Slip-In

Bottom Mount

10 x 12

3 Wire