Home

Explore

View Cart

Deals

Saved

Suggested searches

Plant-based protein powders
Vegan leather handbags
Bedroom decor
Waterproof jackets
Hoodies

Learn more about how we use your data to personalize your experience and ads. Recommendations are for informational purposes only.

ZONEFIRST

Products

Products

ZONEFIRST

RTB – Round Take-Off By-Pass Damper

4.5 (1,234)

Sold 100+ last 30 days

20% off first order

$184.00

Color

Black

Quantity

Product description loading

Product description loading

This is the product description text that will appear here.

Shopping designed around you.

Start selling

For brands

For creators

Build your store

Information

Shop Pay

Help center

Social

X (Twitter)

Instagram

Legal

Terms of Service

Privacy Policy

Your Privacy Choices

Powered by

|

Start selling for free

Language

© Shopify Inc. 2026

Quantity

1

Description

This NEW barametric by-pass damper is a single blade, counter balanced weighted damper that operates on air pressure in order to control the flow of by-pass air. the RTB has an adjustable arm and weight to maintain the correct amount of pre...

Delivery & Returns

Returns accepted

Exclusions may apply. See full policy

ZONEFIRST

You might also like

ZoneFirst SPS static pressure switch with tubing and pressure probe for HVAC zoning systems

ZONEFIRST

SPS - Static Pressure Switch

ZONEFIRST

SPRD – Static Pressure Regulating Damper

ZoneFirst MBD-1 round metal manual balancing damper with hand-adjustable self-locking quadrant

ZONEFIRST

MBD – Manual Balancing Round Damper

ZONEFIRST MZA2 ZONE VALVES

Voomi Supply

ZONEFIRST MZA2 Masterzone Add A Zone 2 Zones 24vac

ZONEFIRST

RDL – Round Damper Spring Return

ZONEFIRST

BPE – Bypass Eliminator™

GSIstore

ZoneFirst MST Damper Actuator

ZoneFirst motorized HVAC zone damper actuator with mounting bracket and wiring for residential heating and cooling systems

ZONEFIRST

OAS – Outside Air Sensor

Braeburn 119118 Round Damper | 18" Round Bypass Damper | Blackhawk Supply

Blackhawk Supply

119118 | Round Damper | 18" Round Bypass Damper | Braeburn

(2)

23% off

Voomi Supply

Honeywell ZD6X8TZ 6 in. x 8 in. Parallel Blade Damper

6" AIRTITE W/DPR & 2" ROSSI RQ 3/8 ROD

34% off

Surplus City

6" Airtite w/Damper & 2" Rossi RQ 3/8" Rod

(1)

EWC Controls 20X8 PRD 20X8 Rectangular Manual Bypass Damper | Blackhawk Supply

Blackhawk Supply

20X8 PRD | 20X8 Rectangular Manual Bypass Damper | EWC Controls

Harfington

4" HVAC Duct Manual Volume Damper Stainless Steel Adjustment Airflow Control

iO HVAC Controls MBD-1208 Manual Rectangular 12 x 08 Zone Damper | Blackhawk Supply

Blackhawk Supply

MBD-1208 | Manual Rectangular 12 x 08 Zone Damper | iO HVAC Controls

ZoneFirst RTM-V2 round take-off motorized damper for precise airflow control in residential HVAC zoning systems.

ZONEFIRST

RTM – 24V (3-wire) Modulating Take-Off Damper (By-pass)

ZoneFirst two-zone HVAC control panel with thermostat, equipment, and motorized damper wiring terminals

ZONEFIRST

RRP – Plug-In-Play Retro-Round Insertable Zone Damper

ZONEFIRST

MT – Manual Balancing Take-Off Dampers

ZONEFIRST PIW25 DAMPERS

Voomi Supply

ZoneFirst PIW25 ModularCord 25 Feet Power Cable

Siemens 985-108 Small Heater Kit for OpenAir Damper Actuators. | Blackhawk Supply

Blackhawk Supply

985-108 | Small Heater Kit for OpenAir Damper Actuators. | Siemens

ZoneFirst motorized HVAC zone damper actuator with mounting bracket and wiring terminals for residential airflow control

ZONEFIRST

ZPS – Zone Plenum Sensor

ZONEFIRST

FX1 Fresh Air Cycler

ZoneFirst motorized HVAC zone damper actuator with mounting bracket and wiring for automatic duct airflow control

ZONEFIRST

MST – Motor Switch Terminal

39% off

Voomi Supply

Honeywell ARD16TZ Zone Control Dampers 16 Inch Round

Vents US Shop

Vents KOM 100 U 4 Inch Backdraft Damper

(1)

12" DIAMETER ROUND DAMPER WITH ML6161 MOUNITNG PLATE AND 2" AXLE EXTENSION

12% off

Surplus City

12" Diameter Round Damper w/Ml6161 Mounitng Plate and 2" Axle Extension

A silver-colored round duct damper, featuring a spring-loaded mechanism and aluminum blades, against a white background.

Vents US Shop

Vents KOM 125 U 5 inch Backdraft Damper

Vents US Shop

Vents KOM 200 U 8 inch Backdraft Damper

A 8 inch Air-Tite Saddle/Pipe Take Off with Damper, featuring a black flange and a silver galvanized steel body.

SquarePeg

12 inch Air-Tite Saddle/Pipe Take Off with Damper

ZONEFIRST

SPAD Gen. 3 – Static Pressure Adjustable Damper

ZoneFirst ZDSM-V2 motorized supply damper for controlling airflow in residential and light commercial HVAC zoning systems.

ZONEFIRST

ZDSM – 24V (3-wire) Modulating Side Mount Damper (By-pass)

ZoneFirst BLISS Wi-Fi HVAC zoning system package with zone control gateway, heat-cool module, wireless damper sensor, and InviS-A-Stat thermostat for room-by-room comfort control.

ZONEFIRST

BLISS Wi-Fi System - Internet of Zoning

ZoneFirst RDP rectangular HVAC zone damper with motorized actuator for airflow control in rectangular ductwork

ZONEFIRST

RDP – Plug-In-Play Zone Damper

ZoneFirst MZA2 motorized HVAC zone damper actuator with wiring terminals for automatic airflow control

ZONEFIRST

MZS4 – 24V 4 Zone All-In-One Zone Control Panel

ZoneFirst motorized HVAC zone damper actuator with mounting bracket and wiring for automatic airflow control

ZONEFIRST

MDP3 (Ver. 04) – Plug-In-Play Universal Zone Control Panel

Resideo M847D-ZONE 24v S/R Open AirZoningDampAct | Midwest Supply Us

67% off

Midwest Supply

M847D-ZONE | 24v S/R Open AirZoningDampAct | Resideo

ZoneFirst PIRR plug-in replacement relay with red transparent housing and multiple electrical terminals for HVAC zoning control systems.

ZONEFIRST

PIRR – Plug-In Replacement Relay

iO HVAC Controls MBD-2008 Manual Rectangular 20 x 08 Zone Damper | Blackhawk Supply

Blackhawk Supply

MBD-2008 | Manual Rectangular 20 x 08 Zone Damper | iO HVAC Controls

SquarePeg

6 inch Round Damper

Danfoss 065B8900 3/4" NPT C20 THERMOSTATIC DAMPER | Blackhawk Supply

10% off

Blackhawk Supply

065B8900 | 3/4" NPT C20 THERMOSTATIC DAMPER | Danfoss

(2)

iO HVAC Controls MBD-1608 Manual Rectangular 16 x 08 Zone Damper | Blackhawk Supply

Blackhawk Supply

MBD-1608 | Manual Rectangular 16 x 08 Zone Damper | iO HVAC Controls

GarageDoorProject

300-68100 Commercial-Grade Garage Door Exhaust Ports 3"-6" Aluminum Latch Options | GarageDoorProject | 100% OEM | US Vendor

GSIstore

ZoneFirst MP12M Damper Motor

ZoneFirst motorized HVAC zone damper actuator with mounting bracket and electrical terminals for residential zoning systems

ZONEFIRST

RTS – 24V (2-wire) Spring Return Take-Off Zone Damper

ZoneFirst RDM-V2 round motorized duct damper for precise airflow control in residential HVAC zoning systems.

ZONEFIRST

RDM – 24V (3-wire) Modulating Damper (By-pass)

ZoneFirst RDS rectangular HVAC zone damper for controlling airflow in residential ductwork

ZONEFIRST

RDS – 24V (2-wire) Spring Return Zone Damper

ZONEFIRST

RDV – Round Damper for Ventilation

ZoneFirst motorized HVAC zone damper actuator with mounting bracket for automatic airflow control in residential ductwork

ZONEFIRST

MDM – Modulating Damper Motor

ZoneFirst motorized HVAC zone damper actuator with mounting bracket and wiring for residential zoning systems

ZONEFIRST

H32 – 24V Heat Pump, Dual Fuel & Conventional Zone Control Panel

SupplyStop.com

ARD14TZ - 14" Round Automatic TrueZONE Damper

SupplyStop.com

ARD10TZ - 10" Round Automatic TrueZONE Damper

1800ceiling

Air Dampers-Radial

(23)

Braeburn 119120 Round Damper | 20" Round Bypass Damper | Blackhawk Supply

Blackhawk Supply

119120 | Round Damper | 20" Round Bypass Damper | Braeburn

Braeburn 119110 Round Damper | 10" Round Bypass Damper | Blackhawk Supply

Blackhawk Supply

119110 | Round Damper | 10" Round Bypass Damper | Braeburn

SquarePeg

10 inch #325 Round Damper Section

Vents US Shop

Vents KOM 150 U 6 inch Backdraft Damper

20% off

Advantage Mechanical Supply

Circular Butterfly Damper - CVM

ZoneFirst ZDBM-V2 motorized bypass damper for residential and light commercial HVAC zoning systems.

ZONEFIRST

ZDBM – 24V (3-wire) Modulating Bottom Mount Damper (By-pass)

ZoneFirst ZDB bottom-mount rectangular HVAC zone damper with aluminum frame, parallel blades, and red actuator.

ZONEFIRST

ZDB – 24V (2-wire) Spring Return Bottom Mount Zone Damper

ZoneFirst round HVAC zoning damper with motorized actuator for controlling airflow through residential ductwork.

ZONEFIRST

VKxx – Make-Up Air Ventilation Damper System

ZoneFirst motorized HVAC zone damper actuator with metal mounting bracket for residential duct airflow control

ZONEFIRST

ZDSP – Plug-In-Play Side Mount Zone Damper

ZoneFirst motorized HVAC zone damper actuator with mounting bracket and wiring for residential duct airflow control

ZONEFIRST

MSS – Silent Spring Return Damper Motor

ZoneFirst motorized HVAC zone damper actuator with mounting bracket and wiring for automatic residential duct airflow control

ZONEFIRST

MP12M – Plug-In Replacement Motor

ZoneFirst 4PDR four-pole double-throw relay and socket assembly for HVAC zoning control systems.

ZONEFIRST

4PDR – 4 Pole Double Throw Relay

Braeburn 119116 Round Damper | 16" Round Bypass Damper | Blackhawk Supply

Blackhawk Supply

119116 | Round Damper | 16" Round Bypass Damper | Braeburn

59% off

Voomi Supply

Honeywell CPRD12 TrueZONE Bypass Damper 12 Inch

SquarePeg

8 inch #325 Round Damper Section

ZONEFIRST RDP-12 DAMPERS

Voomi Supply

ZoneFirst RDP-12 12 Plug-In Round Damper

EWC Controls 16 CLBD 16 CLBD CONSTANT LOAD BY-PASS DAMPER | Blackhawk Supply

Blackhawk Supply

16 CLBD | 16 CLBD CONSTANT LOAD BY-PASS DAMPER | EWC Controls

Shop Fontanesi & Kann

Damper for Round Diffuser (D100)

Harfington

HVAC Duct Manual Volume Damper, Metal Adjustment Airflow Ducting Backdraft Damper Control for Air Ventilation System

(2)

ZoneFirst ZDB HVAC zoning control panel for managing thermostats, dampers, and heating and cooling equipment

ZONEFIRST

OZD – Plug-In-Play Outlet Zone Damper

ZoneFirst motorized HVAC zone damper actuator with metal mounting bracket and wiring terminals for residential airflow control

ZONEFIRST

RTP – Plug-In-Play Take-Off Zone Damper

ZONEFIRST MZS4 ZONE CONTROL PANELS

Voomi Supply

ZoneFirst MZS4 ZoneControl Panel 4 Zone 2HT/2CL

ZoneFirst ZDBP rectangular bottom-mount zone damper with multi-blade design and electric actuator for controlling airflow in HVAC zoning systems.

ZONEFIRST

ZDBP – Plug-In-Play Bottom Mount Zone Damper

ZoneFirst motorized HVAC zone damper actuator with metal mounting bracket for automatic residential airflow control

ZONEFIRST

H32P – Plug-In-Play Heat Pump, Dual Fuel & Conventional Zone Control Panel

ZoneFirst MZA2 motorized HVAC zone damper actuator with adjustable mounting bracket for residential ductwork

ZONEFIRST

MMZ3 – 24V 3 Zone – Single Stage Zone Control Panel

ZONEFIRST

AFC – Anti-Freeze-Up Control

American Copper & Brass

5 ROUND DAMPER FIXED

ZoneFirst MDM-Z Modulating Damper Motor | Midwest Supply Us

67% off

Midwest Supply

MDM-Z | Modulating Damper Motor | ZoneFirst

Vents US Shop

Vents KOM 250 U 10 inch Backdraft Damper

16" "ULTRA-ZONE" ROUND PRESSURE REGULATING BAROMETRIC BYPASS DAMPER, CFM 1250-1900

Surplus City

16" Ultra-Zone Round Pressure Regulating Barometric Bypass Damper

Braeburn 119112 Round Damper | 12" Round Bypass Damper | Blackhawk Supply

Blackhawk Supply

119112 | Round Damper | 12" Round Bypass Damper | Braeburn

EWC Controls 12 CLBD 12 CLBD CONSTANT LOAD BY-PASS DAMPER | Blackhawk Supply

Blackhawk Supply

12 CLBD | 12 CLBD CONSTANT LOAD BY-PASS DAMPER | EWC Controls