TomatoTent Tenti Fan 4 Inch - Delta 12V DC Replacement Exhaust Fan

TomatoTent Tenti Fan With a Delta Brushless Motor

This is the exhaust fan assembly that moves air through the TomatoTent Tenti, mounted on a square black plate with slotted tabs. At its core is a Delta Electronics QFR1212GHE, a 120 mm brushless DC fan that is 38 mm deep. It runs on 12V DC, draws up to 2.70 A and spins on ball bearings. The fan is rated at 210 CFM in free air and 6,000 RPM at full speed. Those figures describe full speed only. At the top of its range it is rated around 64 dBA, which is why a slow setting is the normal state inside the tent. Power and control arrive over a four-pin lead that plugs straight into the Tenti control system. The hub label carries CE and UL recognition marks. A brushless motor has no brushes to wear, which suits a fan that runs around the clock. Its square frame bolts to the plate at the corners, and the slotted tabs handle mounting.

How the Grow Tent Exhaust Fan Runs Inside a Tenti

Inside a Tenti, this fan pulls air through the carbon filter and the air-cooled light before pushing it out of the tent. The grow computer watches temperature and humidity and nudges fan speed up or down to hold them in range. Slow running is the point. Air that moves slowly spends longer in the carbon, so odor stays inside and the tent stays quiet in a bedroom or closet. Swap it in when the original fan gets noisy, starts rattling or stops spinning up when the controller calls for air. Unplug the tent first, release the plate, and seat the new assembly in the same position. Check the arrow on the fan frame before closing up, because a fan mounted backwards pushes air the wrong way through the filter. Dust on the blades costs airflow over time, so a soft brush once per grow keeps it close to its rating. The honest limit is the power supply. It is a low-voltage DC part, so it cannot plug into a wall outlet or a standard inline fan speed controller. Run it from the Tenti controller, or from a matched DC supply if you repurpose it elsewhere.

Key Features

• Delta Brushless DC Motor: The QFR1212GHE spins on ball bearings with no brushes to wear out.
• 210 CFM at Free Air: That headroom lets the controller hold the climate while the fan turns slowly and quietly.
• Controller Speed Control: The Tenti grow computer varies fan speed against temperature and humidity readings.
• Four-Pin Lead: The fan plugs into the Tenti control system without any splicing or soldering.
• Mounting Plate Included: The square frame comes on a black plate with slotted tabs for a straight swap.

Technical Specifications