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BROAN MD8T 8 in Round Motorized Fresh Air Intake Damper - Fresh Air Intake Dampers
BROANFresh Air Intake Dampers

BROAN MD8T 8 in Round Motorized Fresh Air Intake Damper

The BROAN MD8T is an 8-inch round motorized fresh air intake damper, constructed from galvanized steel. It operates as a normally closed unit with a 24V AC nameplate voltage and includes a 24 Volt 20VA transformer…

SKU 3G-OTH-78084

Brand
BROAN
Item
MD8T 8 in Round Motorized Fresh Air Intake Damper
Part Number
MD8T
Category
Fresh Air Intake Dampers
Available to Order
Also known as:MD8TBROAN
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Technical Specifications

BROAN
Manufacturer Part Number
MD8T
Type
10 in L, Galvanized Steel
AC
24V
Includes
24 Volt 20VA transformer
Switch Action
Normally Closed
Nameplate Voltage
24V AC
Blade Seal Material
Foam

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BROAN Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The BROAN MD8T is an 8-inch round motorized fresh air intake damper, constructed from galvanized steel. It operates as a normally closed unit with a 24V AC nameplate voltage and includes a 24 Volt 20VA transformer. The damper features a foam blade seal material.

Frequently Asked Questions

What is the BROAN MD8T motorized damper used for?

The BROAN MD8T is a fresh air intake damper that controls outdoor airflow into HVAC systems. It is typically installed on ductwork to bring in ventilation air when the system calls for it, improving indoor air quality in commercial and residential buildings.

What are the specifications of the BROAN MD8T?

The BROAN MD8T is an 8-inch round motorized damper with a 24V AC nameplate voltage, normally closed switch action, and foam blade seal. It includes a 24 Volt 20VA transformer and measures 10 inches in length and 10 inches in height, made of galvanized steel.

Where to buy the BROAN MD8T worldwide?

3G Electric supplies the BROAN MD8T fresh air intake damper to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your location. Contact us for a quote and lead time on this item.

How to install the BROAN MD8T motorized damper?

Install the BROAN MD8T by connecting it to a 24V AC power source using the included transformer. Mount the damper in the ductwork with the airflow arrow pointing in the correct direction. Wire the normally closed actuator to your HVAC control system for automatic fresh air intake.

Used in

Common applications for BROAN
Residential construction — Broan ERV/HRV models (e.g., B160E65RS, B150E75NS) for whole-house ventilation to meet building codes.
Cold-climate housing — Broan HRV with recirculation defrost (e.g., B160E65RT) to prevent core freezing during winter.
Humid climates — Broan ERV with moisture transfer (e.g., B150E75NT) to manage indoor humidity while ventilating.
Small commercial spaces — Broan surface-mount ceiling heater (MPN 157) for spot heating in vestibules or offices.
Retrofit projects — Broan ERV/HRV side-port or top-port configurations to match existing ductwork and installation constraints.
Light industrial control rooms — Broan ERV/HRV units for fresh-air supply where 120V AC, 60 Hz power is available.
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BROAN Products

3G Electric supplies BROAN fresh air intake dampers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
Motorized fresh air intake damper for 8-inch diameter ducts. Features a flat blade with rubber seal and normally closed switch action. Operates on 24V AC with maximum air velocity of 1,000 fpm. Includes 3-wire harness with modular damper connector. Crimped/slip-over design; dimensions: 8 1/8 in L x 12 7/8 in H x 12 7/8 in W
FIELD CONTROLS
Motorized fresh air intake damper for 8-inch diameter ducts. Features a flat blade with rubber seal and normally closed switch action. Operates on 24V AC with maximum air velocity of 1,000 fpm. Includes 3-wire harness with modular damper connector. Crimped/slip-over design; dimensions: 8 1/8 in L x 12 7/8 in H x 12 7/8 in W
Motorized damper for fresh air intake in 8-inch diameter ducts. Features a flat blade with rubber seal, normally closed switch action, and operates on 24V AC. Includes Fresh Air Ventilation Control (FAVC). Supports maximum air velocity of 1,000 fpm. Dimensions: 8 1/8 in L x 12 7/8 in H x 12 7/8 in W. Crimped/slip-over connection
FIELD CONTROLS
Motorized damper for fresh air intake in 8-inch diameter ducts. Features a flat blade with rubber seal, normally closed switch action, and operates on 24V AC. Includes Fresh Air Ventilation Control (FAVC). Supports maximum air velocity of 1,000 fpm. Dimensions: 8 1/8 in L x 12 7/8 in H x 12 7/8 in W. Crimped/slip-over connection
Motorized fresh air intake damper for HVAC systems, 20-inch diameter, normally closed flat blade with rubber seal. Operates on 24V AC, maximum air velocity 1,000 fpm. Galvanized steel housing with crimped/slip-over connections, includes 3-wire harness with modular damper connector
FIELD CONTROLS
Motorized fresh air intake damper for HVAC systems, 20-inch diameter, normally closed flat blade with rubber seal. Operates on 24V AC, maximum air velocity 1,000 fpm. Galvanized steel housing with crimped/slip-over connections, includes 3-wire harness with modular damper connector

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