Reviews Big Damper

Belimo LF24-SR US Damper Control Actuator, Proportional, Spring Return Fail-Safe, No Auxiliary Switch, 24V

Replacement Damper Motor Actuator for Bathroom Exhaust & Similar Actuators.
Quality tested for over 150K cycles for flawless operation. Heavy-duty motor with all METAL gears..
VDM11-NP damper motor can be used in either Normally Open (NO) or Normally Closed (NC) installations..
Power: 110-120 VAC, 50/60 Hz, 6W, 0.36A | Opening/Closing Force: 0.22 N.m (2 Lb-In).
Installation: Direct coupling to 5/16" damper shaft, works well on both NO and NC dampers..

8″ Universal Automatic Make-Up Air Damper with Pressure Sensor Kit.
Interlocked make-up air damper systems meet IRC Code requirements for make-up air with range hoods over 400 CFM.
Interlocked make-up air systems avoid wasted energy associated with barometric solutions and do not let unwanted air into the home during heating or cooling activities so air pressure is equalized for a well-balanced environment.
Fresh air wall caps are required for use with Make-Up Air Dampers.
Interlocked make-up air dampers provide outside air when required to keep the air in the home fresher by allowing the range hood to operate at optimum levels.
Balance indoor air pressure by providing interlocked make-up air without requiring a direct wire connection between the range hood and the damper.
Instead a sensor is attached to the exhaust duct to detect if the range hood is operating.
Slave dampers (MD6S, MD8S or MD10S) are interlocked to the main automatic or universal make-up air damper and open in unison for synchronized operation..

CAUTION: PLEASE DOUBLE CHECK YOUR SHOCK EYE TO EYE DISTANCE AND THE BUSHING SIZE BEFORE MAKE A PURCHASE. Eye to Eye:220mm × 66mm Travel (8.66×2.6in).
Dark hard-anodized AL-7075 shock body, Damper shaft：Hard chromed shock Ø 12 mm ( 0.47 inch ) shaft, Bushing size: Front Rear 24mm x 8mm (0.95x0.31in).
Spring: Coil Spring, Intended use: AM FR DH.
Include additional Bushing Hardware 50x8mm(1.97x0.31in) as picture.
Weight: 1016g=2.24lbs, Spring Rate: 550lbs, Damping: 4-system, Adjustments: Rebound / Compression / Preload / Adjust High Pressure/Big impact.

PRODUCT FEATURES This 4inch damper vent air blocker does what it is designed to do. It prevents outside air from entering back into your house via dryer, bathroom fan, and grow tent. You will be very pleased with the quality, functionality, value, and ease of installation of this product..
EASY INSTALLATION The 4 inch backflow preventer is easy to install. You will only cram these in the 4" duct and the rubber flap will seal off drafts coming in from your dryer vent or bathroom exhaust fan. Make sure the flaps open away from the ventilator. The outer rubber ring creates a seal around the strong plastic body giving you the perfect vent damper..
FLEXIBLE This backdraft damper's main recycled plastic part is small enough to fit into almost all PVC, metal, and other ducts with 4 inch size. No need to buy multiple products to find the one that works. Purchase with ease and relax in your draft free living space..
CONVENIENT This 4 inline damper duct valve gummi flaps are easy to open for almost all dryers or booster fans. The lack of moving spring will ensure a long lifespan that will save you time and money. As the product ....

CAUTION: PLEASE DOUBLE CHECK YOUR SHOCK EYE TO EYE DISTANCE AND THE BUSHING SIZE BEFORE MAKE A PURCHASE. Eye to Eye:190mm × 51mm Travel (7.48×2.01in).
Dark hard-anodized AL-7075 shock body, Damper shaft：Hard chromed shock Ø 12 mm ( 0.47 inch ) shaft, Bushing size: Front Rear 24mm x 8mm (0.95x0.31in).
Spring: Coil Spring, Intended use: AM FR DH.
Include additional Bushing Hardware 50x8mm(1.97x0.31in) as picture.
Weight: 1016g=2.24lbs, Spring Rate: 550lbs, Damping: 4-system, Adjustments: Rebound / Compression / Preload / Adjust High Pressure/Big impact.

♨️ CORRECT THICKNESS - Vision Grill requires thicker gaskets than other Kamados. This gasket is cut to exact manufacturer specs..
♨️ EASY INSTALLATION - Simply press to install and close lid to cure the self stick adhesive. No need to adjust hinges like with thinner gaskets..
♨️ UNMATCHED PERFORMANCE - High Temp Materials resist flames. Extra material included to seal both lid, base and Damper top of your Vision Grill.
♨️EXPERT SUPPORT – Full USA Product support, troubleshooting, tips and tricks. Compatable with most BBQs requiring a 3/16 to 1/4" thick lid gasket.
♨️ 100% MADE in USA - Trusted by Major Manufacturers. Our best gasket for Big Green Egg Model # GL.

Back draft damper is made for insertion into inch ventilation ducts. The backflow damper RKI opens and closes automatically. It has a strong spring....
Damper has 2 valves, designed for use in air conditioners (AC), dryers, exhaust, extractor or range hoods, heating ducts, vents and other HVAC....
INSTALLATION: The backflow flap is installed by inserting it into the ventilation pipe until it stops. The position of the spring should be horizontal....
The backflow flap opens and closes automatically at low air volumes. It has a smooth-running spring and an internal foam strip to keep the blades from....
Back draught valves can be inserted into ventilation ducts which are flexible or non flexible. Cannot be used with plastic ducts as the sizes are....

Damper pull is made from cast iron with a solid brass handle..
Brass handle features engraved sides that indicate whether the damper is opened or closed..