Full Answer
What is the difference between louvres and dampers?
Louvres vs. Dampers panels. Louvers are angled slats that allow the passage of air and light while dampers regulate the flow of air. Louvers and Dampers are mainly used in HVAC systems for the air flow, depending on the design requirement one can choose between dampers and louvers. Dampers can also block heat and smoke when used as smoke detectors.
What is a damper used for in HVAC?
Dampers and Louvres. A damper (otherwise known as a louvre) is a multi-element flow control device generally used to throttle large flows of air at low pressure. Dampers find common application in furnace and boiler draft control, and in HVAC (Heating, Ventilation, and Air Conditioning) systems.
What is a multi-Vane louver damp?
Kelair Louver Dampers or Multi-Vane Louver Dampers consist of several blades mounted parallel across a duct. They modulate the flow of air and gas in dry or wet conditions or can isolate and shut them off altogether.
What is the purpose of a louver?
A louver allows for control of the way that air moves throughout a building. Unlike backdraft dampers that control exhaust, a louver provides fresh air intake while shutting out rain and other types of weather. A louver has thin slats or fins that adjust to allow air and light to flow into the space.
Whats the difference between a damper and a louver?
The Louver is a kind of a shutter or blind that comes with horizontal slats that are angled to allow space for light and air but restrict rain and direct sunlight whereas dampers control the airflow. In HVAC systems, dampers and louvers are used to regulate the flow of air.
What is the purpose of a louver?
Louvers are used in buildings wherever there is a need for creating resistance to rainwater, excessive noise, hurricane-type winds, or a combination of these problems – while also ensuring proper airflow.
What are the 3 types of dampers?
Air Dampers in Fire Protection Applications. The three main types of dampers used in fire protection applications are fire dampers, smoker dampers and combined fire/smoke dampers.
What are louvers used to control?
For building ventilation systems, louvers are primarily used to separate items from the air flow, such as sand, rain or snow, while backdraft dampers are primarily used to prevent air flow in one direction.
What are the types of louvers?
Three Common Types of Louvers#1 Stationary Straight Blade Louver for Ventilation.#2 Severe Weather Louvers with Chevron Blades for Advanced Weather Protection.#3 Adjustable & Combination Adjustable Louvers with Baffle Blades for Air Control and Weather Protection.
What is the difference between louvre and louver?
So what's the difference between the two? Simply the spelling. While here in New Zealand we use the British English spelling 'louvre', in American English they prefer the spelling 'louver'. It's as simple as that.
How does a damper work?
A damper is a mechanical device (or hydraulic) that absorb and damp shocks impulses. Generally, dampers are hydraulic devices that use oil as the working fluid to damp shocks. The thermal energy created is dissipated through the oil and to the surrounding housing – a primary process to help a damper work efficiently.
What are the six types of damper?
In this guide, we will walk you through the main types of industrial dampers, and their applications, to help you with your decision making process.Multi-Blade Control Dampers. ... Single Blade Dampers. ... Backdraft and Pressure-Relief Dampers. ... Face and Bypass Dampers. ... Inlet Vane Dampers. ... Isolation Dampers.
Why dampers are used in HVAC?
When closed, a damper prevents the air from going across it like a dam does with water. HVAC dampers are an important part of your zoning system. They function as valves in the ducts, determining which portion of your property requires how much heated/cooled air to reach your desired settings.
What is damper ventilation?
A damper is a valve or plate that stops or regulates the flow of air inside a duct, chimney, VAV box, air handler, or other air-handling equipment.
What are louvers made of?
Construction. Modern louvers are often made of aluminum, metal, wood, or glass. They may be opened and closed with a metal lever, pulleys, or through motorized operators.
Are louvers safe?
Louver or jalousie windows: Louver windows are especially vulnerable to intruders because the glass panes can be easily lifted out of their brackets from the outside. A simple way to increase the security of this type of window is to epoxy the panes to the brackets.
What is louvers in interior design?
Consider using louvres to define the flow of internal spaces within the house. Instead of building walls or partitions, these can be brought in to act as light screens. In this house by SPASM, the stand-alone louvres define the entry porch and also create a semi-open space between the house and the open courtyard.
What is another name for a louver?
Louvers Synonyms - WordHippo Thesaurus....What is another word for louvers?shuttersblindsVenetian blindslouvresUKshields10 more rows
What is free area of a louver?
Free area is derived by taking the total open area of a grille/louver (after subtracting all obstructions - blades and frame) and dividing by the overall wall opening. This gives a comparison of a grille/louver opening to an unobstructed opening. Every grille/louver, no matter what size, has a calculated free area.
What is louvers in cooling tower?
Air Inlet Louvers are installed within the tower air inlet to act as barriers for debris, water splash-out, noise, and sunlight while improving airflow and overall tower appearance.
What are the benefits of a louver damper?
Compact interior vane design (open vanes do not extend into adjoining duct as much as butterfly dampers). Best suited for modulation flow control w...
What types of seals can be used on a louver damper?
The most common types of seals used within louver dampers include compression seals, metal seals, and jam seals. Jam seals, in particular, allow fo...
What kinds of applications are louver dampers ideal for?
Kelair steel louvers can be made to withstand temperatures greater than 2000°F (with our in-house refractory) and pressures up to 1 PSI, making the...
What can cause linkages to operate ineffectively on louver dampers?
Linkages connect all shafts to the actuator, allowing the damper to open/close simultaneously. Over long periods of time, linkages may become offse...
How often should packing glands be changed out?
The packing gland is a type of stuffing used to seal the rotating shaft, creating a barrier between the process and the exterior environment. While...
HVAC Systems
Louver dampers are most commonly seen throughout all kinds of industrial and residential HVAC systems. They can be used to efficiently and reliably control the amount of hot or cold air moving through a ventilation system in order to regulate the temperature of a facility.
Stack Isolation
Because louver dampers are able to efficiently and precisely restrict airflow, they are commonly used to minimize heat loss and protect ductwork in stack isolation applications.
Incinerators
Louver dampers can be made using materials that are highly resistant to high heat, making them ideal for ventilation or air intake for incinerators. They also allow for fast operating speeds, making quick adjustments easy and doable.
What is a louver and a damper?
Dampers and louvers both are used to manage the free flow of air but with different purposes. People often get confused between louvers and dampers due to a few of the similarities they have. For instance, they both have exterior frames and horizontal blades. Moreover, they are mostly placed on walls and can work as either ...
What is an industrial damper?
Industrial dampers- these dampers are mainly of three types. Bu bble tight dampers – these bubble-tight dampers are utilized in applications that need shut off capabilities under extreme conditions. They can also be used in nuclear power plants and they are tested based on the ASTM and ASME standards.
What is the difference between a louver and a blind?
The Louver is a kind of a shutter or blind that comes with horizontal slats that are angled to allow space for light and air but restrict rain and direct sunlight whereas dampers control the airflow. In HVAC systems, dampers and louvers are used to regulate the flow of air. One can select between dampers and ...
What is a damper in HVAC?
A damper in an HVAC system, also known as Duct Damper or Volume Balancing Damper is a movable plate, situated in the ductwork that regulates the flow of air and redirects it to specific places of a house. The usage of dampers is typically seen in zoning or zone control systems. Air Dampers are an …. Continue reading.
What is a motorized damper?
The usage of motorized dampers is typically seen in places where a very tight seal is needed or when the damper needs to work against the air pressure. Gravity dampers, also known as shutters, are needed in horizontal fan exhaust applications.
When is a louver needed?
When an application needs air shutoff, both the support of damper and louver is required as louvers are equipped with fixed blades that are unable to close.
What is a counterbalanced backdraft damper?
Counterbalanced backdraft damper – like backdraft dampers, they are also made of galvanized steel and designed to fulfill application needs depending on pressure, temperature, and velocity.
What is the size of Louver damper?
*Operational testing and calibrating are completed at the factory prior to installation. Product Features & Specifications. Sizes: 14″ to 132″. Process Temperature: up to 1100° F.
What type of seals are used in louver dampers?
The most common types of seals used within louver dampers include compression seals, metal seals, and jam seals. Jam seals, in particular, allow for thermal growth of the blade (s) and can minimize the accumulation of fly ash.
What is a Kelair duct damper?
Kelair Louver Dampers or Multi-Vane Louver Dampers consist of several blades mounted parallel across a duct. They modulate the flow of air and gas in dry or wet conditions or can isolate and shut them off altogether. Opposing blade type louvers allow the flow to increase or decrease. Parallel blades allow for complete shut off and are particularly useful where space is restricted.
What is a parallel blade louver?
Opposing blade type louvers allow the flow to increase or decrease. Parallel blades allow for complete shut off and are particularly useful where space is restricted. These dampers are frequently motorized or can be manually adjusted for flow control. Louver dampers control gas or air flow, detour flow into separate systems, ...
Louvers
Angled slats that allow light and air to pass through, but block out rain, direct sunlight, and noise. The angle of the slats may be adjustable (controlled manually or by an actuator), or fixed.
Dampers
Used to stop or otherwise regulate airflow.
Doors
We offer a variety of steel and aluminum, full-sized and duct access doors in a variety of configurations, including: foam filled, in-swing doors, out-swing doors, right hand doors, left hand doors, thermal break, and double doors, each with optional plexi-glass, wire glass or thermal pane viewports.
Rooftop Products
A variety of equipment including: passive solar shading to strategically manage solar heat gain, equipment screens for enhanced buiding aesthetics, and penthouse louvers to allow ventilation while preventing water penetration
What is a louver?
A louver is similar to a backdraft damper. A louver allows for control of the way that air moves throughout a building. Unlike backdraft dampers that control exhaust, a louver provides fresh air intake while shutting out rain and other types of weather. A louver has thin slats or fins that adjust to allow air and light to flow into the space.
What is an adjustable louver?
Adjustable: This type of louver features blades that can move to fit the precise need of the space.
What Is a Backdraft Damper?
A backdraft damper, also known as a gravity damper, is a piece of equipment that allows air to flow through in one direction while preventing air from entering the opposite side, also known as a backdraft. Backdraft dampers assist in the exhaust or intake of heating, ventilation, and air conditioning ( HVAC) systems.A backdraft damperhelps to reduceenergy loss in a building and also maintains a consistent pressure within the area.
What to consider when selecting a damper?
Environment: A contractor must consider the amount of wind and rain, as well as the climate of the building before selecting the appropriate louver or damper. Pressure: Different products perform in different ranges of pressure.
What are the different types of louvers?
What Different Types of Louvers Are There? 1 Adjustable: This type of louver features blades that can move to fit the precise need of the space. 2 Stationary: These louvers feature angled or airfoil-style slats that help protect against weather and sound. 3 Combination: These louvers have blades that open based on the amount of static pressure. This style louver may also incorporate a backdraft damper. 4 Air measuring: These louvers have carefully placed vertical slats to prevent water from entering the space.
What is a combination louver?
Combination: These louvers have blades that open based on the amount of static pressure. This style louver may also incorporate a backdraft damper.
Can a backdraft damper be installed vertically?
Backdraft dampers can be mounted horizontally and vertically, although the mounting direction changes the type of damper that contractors must install. A contractor can install a motorized backdraft damper either horizontally or vertically, giving the contractor more versatility in the design of the space. If the damper is gravity operated, the contractor must install the damper vertically so that gravity can move the flaps open and closed.
What is an air damper?
Let’s start with an air control damper. According to the Lloyd Industries website, an air control damper, also known as a volume balancing damper, is used to control airflow inside an air conditioning or heating duct, air handler, chimney, VAV box, or other pieces of air-handling equipment. These dampers provide precise control ...
What is a louver in HVAC?
According to Dictionary.com, a louver is “any of a series of narrow openings framed at their longer edges with slanting, overlapping fins, or slats, adjustable for admitting light and air while shutting out rain.” A louver is a type of damper and is beneficial in protecting ventilation systems from the elements while still allowing air to be pushed in or pulled out, depending on the need of the HVAC system. Louvers are versatile, lightweight, compact, and don’t usually cause air leakage.
What Is a Combination Louver?
A combination louver is precisely what it sounds like: a combination between a louver and an air control damper. Contractors typically install these products in industrial warehouses or large spaces. Installing a separate louver and an air control damper can be expensive, especially considering the size of the areas these products typically service. By installing a combination louver, building companies can reduce the cost of installation by 50 percent.
What type of louver protects against weather?
Two specific types that protect against weather are hurricane louvers and wind-driven rain louvers.
How do combination louvers work?
A combination louver can be operated in two ways: either manually or through the use of an actuator. Combination louvers help to maintain a uniform look to the outside appearance of the building while still providing control of the airflow behind the louver. If a company is concerned about the outward appearance of its structure, installing a combination louver helps create a more appealing visual.
What is a hurricane louver?
Hurricane louvers protect against the pressure generated by high winds, the impact of flying debris, and high-velocity rain caused by wind. Many cities and states have different standards by which they judge a combination louver that will be installed, so it’s vital to ensure that your products meet the specifications necessary. These standards help safeguard your home or business against additional damage from harsh weather conditions.
Why are dampers important?
Dampers are beneficial in situations when there is a need to moderate air or gas flow, create a detour or diversion of flow between systems, or isolate a process for repair or inspection.