The LOBISONG LBDD‑100 series dc inline duct fan includes three variants of Ø100 mm metal inline duct fan running on 12V,24V and 48V DC power. This dc duct fan delivers strong static pressure and adjustable airflow, supporting 0‑10V DC and PWM signal plus tacho output for smart ventilation integration. Built‑in multiple motor protections and maintenance‑free ball bearing enable long‑hour running for bathrooms, grow tents, equipment cooling and light‑commercial HVAC ducting scenarios. This 100mm duct fan offers flexible voltage selection to match different power supply systems for global B2B buyers.

Many system integrators face power‑matching challenges when selecting a dc inline duct fan for duct ventilation projects. Different site conditions require distinct DC input voltage, so the LBDD‑100 metal inline duct fan series provides 12V, 24V and 48V versions under the same 100 mm frame size. The 12V LBDD‑100L‑MBN‑11 dc duct fan fits low‑voltage small power supply systems, while 24V LBDD‑100M‑MBN‑12 reduces working current for centralized control cabinets, and 48V LBDD‑100H‑MBN‑13 further cuts current draw and adapts to renewable energy power setups. All models adopt durable metal housing paired with plastic impeller, reaching IP44‑55 protection grade and Class B insulation standard. As a reliable inline ventilation fan, each unit integrates polarity protection, soft‑start function, over‑current and over‑voltage protection. The soft‑start mechanism avoids instant current surge which may damage peripheral control modules; polarity protection prevents motor burnout caused by wrong wire connection during field installation. Equipped with maintenance‑free ball bearing, this 100mm duct fan can operate stably within ambient temperature ranging from ‑25℃ to 60℃. Speed regulation via 0‑10V DC or PWM signal allows users to tune airflow precisely according to real‑time ventilation demand, and tacho output feeds real‑time rotating speed data back to smart control panels. Noise performance stays within 62‑65 dB(A), balancing airflow output and acoustic comfort for both residential renovation and light‑commercial equipment cooling. When designing this dc inline duct fan series, our engineering team unifies mechanical mounting dimension across three voltage variants. It means B2B customers can swap among these metal inline duct fan SKUs without modifying existing duct installation structure, greatly lowering spare‑part stocking pressure and on‑site replacement cost. Users should note that max airflow and static pressure differ slightly between 12V/24V and 48V models, and engineers need to pick proper dc duct fan variant based on actual duct resistance and target air volume during project design phase.

• Multi‑voltage option within unified frame: This dc inline duct fan supplies 12V,24V,48V variants, same Ø100mm dimension for easy swap of metal inline duct fan in ventilation projects.
• 0‑10V & PWM adjustable speed plus tacho output: The dc duct fan supports smart system integration, real‑time speed monitoring for automatic inline ventilation fan control.
• Complete built‑in motor protection: Polarity protection, soft‑start, over‑current and over‑voltage safeguard extend service life for the 100mm duct fan under harsh operating conditions.
• IP44‑55 protection & Class B insulation: Metal housing structure makes this dc inline duct fan resist moisture and dust for humid indoor installation scenarios.
• Maintenance‑free ball bearing: No regular lubrication required for the metal inline duct fan, reducing long‑term maintenance workload for end‑users.
• Wide working temperature window: The dc duct fan runs reliably from ‑25℃ up to 60℃, suitable for both cold and high‑heat inline ventilation fan applications.

Most ordinary dc inline duct fan products only supply single‑voltage version, forcing buyers to redesign duct structure when power supply condition changes. This metal inline duct fan series solves this pain point by mechanical interchangeable design. The brushless DC motor inside this dc duct fan brings higher energy efficiency compared with AC duct fan alternatives: DC motor consumes less power under same airflow output. The soft‑start function of this inline ventilation fan is often overlooked yet critical for smart building projects. Without soft‑start, instant high starting current may trigger alarm of upstream PLC or controller modules. The tacho signal output allows upper‑level system to monitor real working status of each 100mm duct fan, realizing fault warning for unmanned ventilation systems. Users should notice that IP55 grade provides better water‑drop resistance than IP44, select higher protection level when installing this dc inline duct fan in high‑humidity splash‑prone spaces. For duct system design, static pressure value of the metal inline duct fan must be higher than total duct resistance, otherwise actual airflow will drop far below the nominal parameter listed on datasheet.

• Residential duct ventilation: The dc inline duct fan works for bathroom and kitchen exhaust, this metal inline duct fan improves indoor air quality.
• Grow tent ventilation: Adjustable‑speed 100mm duct fan offers precise airflow control for plant growing environment.
• Equipment cabinet cooling: The dc duct fan dissipates heat for electronic cabinets with smart control signal compatibility.
• Light‑commercial HVAC ducting: This inline ventilation fan fits small‑size air circulation for shops and office auxiliary ventilation.
• Renewable energy system ventilation: 48V variant of dc inline duct fan matches solar‑power off‑grid ventilation projects.
• Smart building ventilation module: Metal inline duct fan with 0‑10V/PWM and tacho output connects to building automation system.

For B2B system integrators and OEM buyers, the interchangeable design of this dc inline duct fan series reduces SKU management pressure. When your projects cover sites with different DC power supply, you can select proper metal inline duct fan variant without modifying duct mounting structure. The built‑in multi‑protection of dc duct fan lowers product return rate caused by field mis‑operation. Maintenance‑free ball bearing cuts after‑sales service cost for inline ventilation fan products. The support of standard 0‑10V and PWM control makes this 100mm duct fan compatible with mainstream global smart ventilation controllers, shortening your product development cycle. Consolidating ventilation component sourcing on this dc inline duct fan series helps you simplify procurement list and improve overall project profitability.

Q: Can I run this dc inline duct fan directly without 0‑10V or PWM controller?

A: Yes. Supply rated DC voltage directly, then this metal inline duct fan will run at full speed. 0‑10V / PWM signal is only for speed adjustment function of the dc duct fan.

Q: What does tacho output of this inline ventilation fan do?

A: Tacho output sends pulse signal reflecting real rotating speed of the 100mm duct fan. Upper control system can read this signal to judge working status and trigger fault alarm for the dc inline duct fan.

Q: Can I swap 12V, 24V and 48V metal inline duct fan directly on existing duct?

A: Mechanical dimension is identical, so physical swap is available. But you must match power‑supply voltage to dc duct fan rated voltage; mismatched voltage will burn the motor of this inline ventilation fan.

Q: What is the difference between IP44 and IP55 for this dc inline duct fan?

A: IP44 resists splash water; IP55 stands against low‑pressure water jet. Choose IP55 metal inline duct fan if your installation site faces frequent water splashing for dc duct fan inline ventilation fan application.