Resideo MARD-8 Damper
The Resideo MARD-8 is a heavy-duty 8-inch modulating automatic round damper designed for high-performance bypass and zone control in commercial and residential HVAC systems. Built with a 22-gauge galvanized steel shell, this single-blade damper features a male-crimped and female-uncrimped end for seamless integration with rigid or flexible ductwork. A primary application for this 3-wire motorized damper is managing bypass air in systems larger than 2000 CFM (5 tons), where it works in tandem with an SPC (Static Pressure Control) to maintain precise duct velocity.
Equipped with a 24Vac floating-control actuator, the MARD-8 offers a 90-second stroke time from power open to power closed. This modulating actuator (typically the LMB24-3-T or ML6161 series) is side-mounted for accessibility and ensures reliable blade positioning without the risk of drifting. For contractors balancing multi-zone HVAC systems, the Resideo MARD-8 damper provides the essential pressure relief needed to prevent coil freezing and excessive noise at the registers while maintaining low-leakage performance up to 2.0 in. W.C.
Key Benefits for HVAC Professionals
- Precision Airflow Management: The modulating floating actuator provides granular control for HVAC bypass applications, ensuring system pressures stay within design specs.
- Durable Construction: The 22-gauge galvanized steel frame and reinforced linkage are built to withstand the high-velocity air common in light commercial zoning.
- Universal Duct Compatibility: Features a standard 8" round diameter with crimped ends, simplifying the install on existing HVAC ductwork without custom adapters.
- Versatile Mounting: The assembly can be oriented horizontally or vertically, provided the motor is positioned on the side or top to prevent moisture accumulation.
Common Questions Regarding the MARD-8
Can I use the MARD-8 as a standard zone damper?
Yes. While optimized as a modulating bypass damper, it functions effectively as a round zone damper when wired to a compatible TrueZONE panel or floating-point thermostat.
What is the typical wiring configuration for this unit?
The MARD-8 uses a three-wire terminal block: M1 (Common), M4 (Hot-Open), and M6 (Hot-Closed). It requires a 24V transformer and floating-point signal to traverse the 90-second timing.
Should I install this on a system smaller than 5 tons?
While recommended for systems exceeding 2000 CFM, the Resideo MARD-8 is frequently used in residential forced air zoning where technical precision and power open/power closed reliability are required over spring-return models.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $265.10
-65%$265.10
$92.78Resideo MARD-8 Damper
The Resideo MARD-8 is a heavy-duty 8-inch modulating automatic round damper designed for high-performance bypass and zone control in commercial and residential HVAC systems. Built with a 22-gauge galvanized steel shell, this single-blade damper features a male-crimped and female-uncrimped end for seamless integration with rigid or flexible ductwork. A primary application for this 3-wire motorized damper is managing bypass air in systems larger than 2000 CFM (5 tons), where it works in tandem with an SPC (Static Pressure Control) to maintain precise duct velocity.
Equipped with a 24Vac floating-control actuator, the MARD-8 offers a 90-second stroke time from power open to power closed. This modulating actuator (typically the LMB24-3-T or ML6161 series) is side-mounted for accessibility and ensures reliable blade positioning without the risk of drifting. For contractors balancing multi-zone HVAC systems, the Resideo MARD-8 damper provides the essential pressure relief needed to prevent coil freezing and excessive noise at the registers while maintaining low-leakage performance up to 2.0 in. W.C.
Key Benefits for HVAC Professionals
- Precision Airflow Management: The modulating floating actuator provides granular control for HVAC bypass applications, ensuring system pressures stay within design specs.
- Durable Construction: The 22-gauge galvanized steel frame and reinforced linkage are built to withstand the high-velocity air common in light commercial zoning.
- Universal Duct Compatibility: Features a standard 8" round diameter with crimped ends, simplifying the install on existing HVAC ductwork without custom adapters.
- Versatile Mounting: The assembly can be oriented horizontally or vertically, provided the motor is positioned on the side or top to prevent moisture accumulation.
Common Questions Regarding the MARD-8
Can I use the MARD-8 as a standard zone damper?
Yes. While optimized as a modulating bypass damper, it functions effectively as a round zone damper when wired to a compatible TrueZONE panel or floating-point thermostat.
What is the typical wiring configuration for this unit?
The MARD-8 uses a three-wire terminal block: M1 (Common), M4 (Hot-Open), and M6 (Hot-Closed). It requires a 24V transformer and floating-point signal to traverse the 90-second timing.
Should I install this on a system smaller than 5 tons?
While recommended for systems exceeding 2000 CFM, the Resideo MARD-8 is frequently used in residential forced air zoning where technical precision and power open/power closed reliability are required over spring-return models.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Resideo MARD-8 is a heavy-duty 8-inch modulating automatic round damper designed for high-performance bypass and zone control in commercial and residential HVAC systems. Built with a 22-gauge galvanized steel shell, this single-blade damper features a male-crimped and female-uncrimped end for seamless integration with rigid or flexible ductwork. A primary application for this 3-wire motorized damper is managing bypass air in systems larger than 2000 CFM (5 tons), where it works in tandem with an SPC (Static Pressure Control) to maintain precise duct velocity.
Equipped with a 24Vac floating-control actuator, the MARD-8 offers a 90-second stroke time from power open to power closed. This modulating actuator (typically the LMB24-3-T or ML6161 series) is side-mounted for accessibility and ensures reliable blade positioning without the risk of drifting. For contractors balancing multi-zone HVAC systems, the Resideo MARD-8 damper provides the essential pressure relief needed to prevent coil freezing and excessive noise at the registers while maintaining low-leakage performance up to 2.0 in. W.C.
Key Benefits for HVAC Professionals
- Precision Airflow Management: The modulating floating actuator provides granular control for HVAC bypass applications, ensuring system pressures stay within design specs.
- Durable Construction: The 22-gauge galvanized steel frame and reinforced linkage are built to withstand the high-velocity air common in light commercial zoning.
- Universal Duct Compatibility: Features a standard 8" round diameter with crimped ends, simplifying the install on existing HVAC ductwork without custom adapters.
- Versatile Mounting: The assembly can be oriented horizontally or vertically, provided the motor is positioned on the side or top to prevent moisture accumulation.
Common Questions Regarding the MARD-8
Can I use the MARD-8 as a standard zone damper?
Yes. While optimized as a modulating bypass damper, it functions effectively as a round zone damper when wired to a compatible TrueZONE panel or floating-point thermostat.
What is the typical wiring configuration for this unit?
The MARD-8 uses a three-wire terminal block: M1 (Common), M4 (Hot-Open), and M6 (Hot-Closed). It requires a 24V transformer and floating-point signal to traverse the 90-second timing.
Should I install this on a system smaller than 5 tons?
While recommended for systems exceeding 2000 CFM, the Resideo MARD-8 is frequently used in residential forced air zoning where technical precision and power open/power closed reliability are required over spring-return models.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
