Price vav boxes

Price vav boxes. • Right-hand controls location is standard (shown) when looking in direction of airflow. The Titus ESV is unique as it incorporates many design features that increase performance, decrease service and techniques for designing high performing VAV systems at minimal cost. (25 PA) EXTERNAL STATIC PRESSURE TO OPERATE. ahridirectory. All of these systems are designed around the VAV philosophy of load diversity, low turndown ratios, high efficiency/low running costs, use of Electric Single Duct Terminal. 120, 208-230, 277 Volt Single-Phase EC for VAV pressure independent operation. See Single Duct VAV (TSS) Critical in today’s building environments is the need to place significant emphasis upon the occupants comfort and indoor acoustics. Superior “FlowStar” Air Measuring Probe provides for lower minimum cubic feet per minute (CFM) values, which reduces energy costs and noise while maintaining comfort in the zone. Resources. V i2 866"' i2 865. The Price FDCLP2 fan powered constant volume terminal units are an excellent solution for air volume control in restricted ceiling spaces, with unit heights as low as 8 5/8 in. SRDV, SRPV. V2RVg SDV/SDVQ Damper Actuator Controller Manufacturer Price Controls Price Controls Honeywell Honesm. • MINIMUM 0. Blower access panel for improved field Nov 29, 2022 · When these waxes are heated, a strong expansive force drives a piston. Stainless steel construction is available when corrosives and particulates are present in the airstream. • ELECTRIC MOTOR 1 PHASE, 60 CYCLE. In very simple terms buildings can have individual HVAC units in every space or have a central unit and allow a (VAV) “box” in every zone to maximize comfort and efficiency. In the bypass application, static pressure Application Engineering Department supports the diverse line of Price products. This design allows the primary airflow to supply the cooling demand, similar to single duct terminal units, leaving the recirculating air section to provide the heating air volume. ElEctric coils priceindustries. Our dependable quality, reliable delivery, and knowledgeable follow-up service have made Price a market leader in supplying air distribution, critical controls, and noise control products. 1 FDCLP2 3010 VAV-101 957521 1 FDCLP2 3010 VAV-101 0 L/S 0 CFM 3010 FLD/6000 0, 1800, 200, 1390 FG50 ECM 277 Volts PRICE RESEARCH CENTER VAV-101 MODEL 031600 Printed on 01/29/2015 RESET SPAN ITEM AIR VOUME (CFM) RESET SPAN ITEM VAV SPECIFICATIONS MODEL MOTOR AIR DISTRIBUTION PRODUCTS Price Order No: Branch PO: Customer PO: Job Name: Package Tag Cool only single ducted series. Damper leakage is less than 2% of nominal flow at 3” w. One to four row construction. The VAV damper rotates to a minimum position reducing airflow. VariTrane ® variable-air-volume (VAV) units lead the industry in quality and reliability and are designed to meet the specific needs of today’s applications. Operation is not affected by position. The leak-resistant casing is fabricated with 22 gauge galvanized steel and is mechanically fastened. Multipoint crossflow sensor for accurate flow measurement. Price All-In-One for Engineers calculates the performance of key products using lab verified equations from product lines including noise control, terminals, fan and blower coils, chilled beams, and grilles, registers, and diffusers. Max Air Flow: From 80 to 8, 000 CFM. Highly effective integral attenuator; Box style construction for the reduction of the airflow velocity; Electronic control components for different applications (Easy, Compact, Universal, and LABCONTROL) All-In-One For Engineers Providing engineers with new levels of insight into Price products. Variable Air Volume Boxes and VAV Terminal Units. Receiving Inspection Variable-Air-Volume (VAV) Box Controller • VAV-SVX07*-EN — Tracer®UC400 Programmable BACnet®Controller for VAV Units • VAV-SVP01*-EN — VAV VV550 LonTalk®Controller • VAV-SVX01*-EN — VAV-UCM 4. Louvers (204) 661-7875 Favorite. 20 GA. When the waxes are cooled, springs retract the piston. Jan 10, 2023 · Streamlining Your Workflow with the Price Engineer Toolkit. A VAV box regulates airflow through the use of a damper, which can open or close to control the amount of air that enters a space. A single duct VAV (cooling only VAV) is a basic air terminal unit with a damper, actuator Incorporation of an airflow sensor allows the SDV to compensate instantly for any change in supply air pressure that might alter the supply volume resulting in a pressure independent variable air volume system. 5 hp/1,000 cfm (6. Optional left hand controls mounting is available. Price International also represents Antec Controls, offering a wide range of products for environmental monitoring and control in critical spaces, including airflow valves, monitors and controls. The new range of products merge air flow control functionalities with the monitoring of other parameters like temperature. Contact - Price Industries. 1) • 30 hp and larger fan motors must use no more than 30% of design power at 50% airflow (6. With the same basic components as a standard single duct terminal, the SDE single duct exhaust terminal unit is configured to control exhaust air with minimal pressure drop and low noise levels. VAV Boxes and Air Terminal Accessories: Single Duct Terminal Units Hot Water Reheat Coils Pneumatic Actuators and Controls. The most common include: Single duct terminal VAV box – the simplest and most common VAV box, shown in Figures 1 and 2, can be configured as cooling-only or with reheating. Type of control (electric, pneumatic, DDC). 5 Hz as an input for the 24VAC pulsed signal. Solo/Sync Motor Control Technology. Flow Rate: 127 - 991 l/s. 5Pa]. 5 LB/CU. Digital Variable Air Volume Diffuser. Receiving Inspection Rectangular silencers are designed to reduce noise in rectangular ductwork while minimizing system pressure drop. 5) Q = 15 * 0. Description : CONNOLS-AIR DDC microprocessor based V750 air terminal units are the latest, state-of-the-art, high quality terminal units, that provide good control accuracy and capabilities required in every modern intelligent building. Their primary function is to regulate airflow to a zone, in response to zone temperature requirements. A room temperature sensor provides constant feedback to the microprocessor controller located in the diffuser, enabling precise monitoring of individual space temperatures. SDV - Single Duct Terminal Unit with 3/4" Fiber Free Foam Liner, Controls Enclosure, Multi-Point Airflow Sensor. There are 3 types of VAV system used in the market place today. org VAV Terminals AHRI Standard 880. Because the supply air temperature, in this simplest of VAV systems, is constant, the air flow rate must vary Pressure Independent VAV with Heater (Variable Air Volume Terminals) • Pressure Independent VAV Unit has one primary air inlet, one rectangular discharge outlet to the room and one rectangular bypass discharge outlet. VAV Diffusers (510) 785-0510 VAVdiffusers@priceindustries. Features and Benefits. To install the SRDV and convert the system to variable air volume, simply cut a rectangular hole in the existing ductwork and slide in the SRDV retrofit terminal CM LISTEO CERTIFIED TM www. The PCV is a damper and controller that modulates to provide pressure control. • Pair • For systems under 20,000 cfm, VAV is limited to 1. Heavy gauge damper with polyure­thane gasket rated for up to 1. The VAV box is equipped with a sensor, typically a temperature FDCLP2 Family. Grille, register and diffuser applications include aesthetic, functional (are direction and control) or a combination of VariTrane® Single Duct Terminal Units. The airflow sensor should be able to generate this signal with only 400 to 450 FPM air velocity through the inlet collar. The most common VAV box is a single-duct terminal unit, which regulates the volume of air that each space requires Jan 22, 2024 · Types of VAV Boxes and Their Applications. Select VAV boxes for minimum life cycle cost 3. Duct size and/or air volume. 22 gauge zinc-coated steel casing. As an option, these terminals can be equipped with hot-water heating coils or electric heaters. For information concerning controls, components, sequence of operation, etc. com. + Price PIC controls as well as a variety of third party controls. 2. " The VAV regulates the volume of the air to the zone by opening or closing the damper, thus controlling the amount of conditioned air directed to the zone. com Price recommends a minimum 2 second period at 0. For retrofit applications, the RDV can Oct 24, 2017 · P: (856) 541-1776 www. The T3SQ modulates the air volume delivered to a zone to accurately control cooling and heating conditions. Fan speed control is used in the medium pressure ducts to capture the energy savings when the air is D E. , please refer to the documentation provided by the controls contractor. Author. • Model D3001 can be installed horizontally, vertical or at any angle. Fan-powered single ducted parallel with reheat - uses plenum air before using reheat for energy efficiency. See Figure 1 below for a schematic representation of the concept. Variable Air Volume (VAV) is a type of heating, ventilating, and/or air-conditioning (HVAC) system. To learn more, please visit www. casing on larger sizes for added durability. Using the room, duct and setpoint temperatures, the Prodigy MQTH-500 Single Duct Air Terminal Unit. The water coils are built with staggered copper tubes and aluminum fins for effective and economic heat transfer and are rated and certified to AHRI 410. Help to control comfort, indoor air quality (IAQ), noise levels, and energy consumption with the VariTrane single duct terminal units. Span Damper T hermostat Coil Application AIR FLOW: INSTALLED: Special Instructions: Price Order No. Features: Tight close-off. Receiving Inspection Dec 31, 2019 · For larger systems, air may be distributed with medium pressure and then reduced to low pressure with a Pressure Control Valve (PCV) for each zone of VAV diffusers. Features. SINGLE DUCT VARIABLE VOLUME CONTROL ASSEMBLIES. 84 [3521 Control Panel [Std] See Enclosure Options SINGLE DUCT AIR TERMINAL UNIT WITH INTEGRAL ATTENUATOR 46 3/4 [1187] Top View Flow Width X Height Control Panel [Std] Many VAV controllers require a minimum differential pressure signal of 0. 6 CFM WebSelect VAV Selection/Pricing Quick Start User Guide Page 4 Step 2 - Selecting the First VAV Box in a Project Note: The program selects, configures and prices VAV boxes all at once so when you price a box, the engineering rules are checked at the same time. The inlets are typically connected to two of 90. This solution lets OEMs integrate systems Titus brings both accuracy and flexibility to the variable air volume (VAV) market with T3SQ VAV diffusers. H. The VAV box section will help with hot water coil selection, which is important because the results in the software are often at odds VariTrane® Low-Height Fan-Powered Terminal Units. A variable air volume (VAV) diffuser is essentially a ceiling diffuser with a built-in VAV damper and thermostat. Share. 707. 7 hp/1,000 cfm. 2 IOM ReceivingandHandling These units are shipped completely assembled with the exceptions of outlet duct temperature sensors on non- Many VAV controllers require a minimum differential pressure signal of 0. Barcol-Air is the only European and world-wide manufacturer of all types of VAV systems. The T3SQ combines the functions of a VAV terminal and a high performance diffuser in one. SDE, SDEQ. This generation of VariTrane units builds upon Trane’s history of quality and reliability and expands the products into Dampers. Electric Coils - Single Duct. Single Duct terminals are the fundamental building blocks for Variable Air Volume (VAV) systems. Conditioned primary air volume is varied during cooling while the fan cycles on during heating. A single duct box, also known as a VAV, is one of the most simple and cost effective types of terminal unit. Aside from the control aspect of VAV boxes, pneumatic, electric, electronic, or DDC, there are many different variations to VAV Boxes and we will attempt to The VAV and room automation solution for OEMs. Incorporation of an airflow sensor allows the SDV to compensate instantly for any change in supply air pressure that might alter the supply volume resulting in a pressure independent variable air volume system. The most common set-up (for DDC) is, of course, usually the cheapest to install. The blend of waxes produces a precise movement per degree of temperature change. 3. T3SQ-4. 1. Pneumatic Single Duct Terminal. • ZINC COATED 20 GAUGE STEEL HOUSING. VAV Boxes are an HVAC Item that is relatively simple and yet so many get intimidated by what they are all about. The Price DDV is an economical, non-mixing dual duct terminal unit that precisely regulates the flow of conditioned air to a room or zone in response to thermostat demand for cooling or heating. 0-2. At the end of this presentation, you will be able to: 1. The FDCLP2 provides constant air volume delivery to the occupied zone in response to a control signal. Multipoint crossflow sensor for accurate Functional and aesthetic products to maximize occupant comfort. Conventional airflow sensors without amplification Digital Controls (DDC) for VAV pressure independent operation. The simplest VAV system incorporates one supply duct that, when in cooling mode, distributes approximately 55 °F (13 °C) supply air. The series fan units are specifically designed for quiet operation and they also offer improved With minimal pressure drop and low noise levels the Price Industries SDV controls the airflow rate of conditioned air into an occupied space in response to a thermostat control signal. A wide range of design and performance options allow rectangular silencers to be NFPA 90A and UL 181. The MQTHI5 unit sets the standard in the industry for construction, performance, and quality. Digital Single Duct Terminal. It is located inside the duct work and is designed to control the air flow to a specific area, called a "zone. Parallelfan-poweredterminalunit(VPCF) Figure2. ACCESSORIES A variety of additional accessories are offered to meet specific job requirements. Figure1. Compare ducted vs. There are many VAV systems out there set up in different ways. • (PIC-VAV) - VAV module (optional) provides air˜ow sensing for true VAV control. Price's All-ln-One Selection Software is a great tool for engineers and designers to select various products. It is this movement of the piston that is the motor for the diffuser modulating the VAV damper. The Price Intelligent Controller is also expandable for BACnet networking capabilities, and for Pressure Independent control. Price factory-mounted water coils are designed specifically to suit Price terminals units. 120, 208-230, 277 Volt Single-Phase EC Motors. This series is available in a wide range of sizes with available capacities from 80 to 8,000 CFM. Keywords. Only available in the Asia-Pacific and Middle East regions. A variable air volume terminal unit, or VAV box, provides space-specific heating, ventilation or air-conditioning to individual zones within a larger indoor environment. The damper is controlled by a controller that receives input from a thermostat. For information concerning controls, components, sequence of We would like to show you a description here but the site won’t allow us. Rectangular Inlets On Sizes: 20-24 inch. AX Xenta b3-866. The expansion modules come equipped with a ribbon cable that is easy to plug in from the PIC to the selected module. For instance, suppose a variable air volume terminal unit (VAV box) has a K-factor of 15 and a measured pressure differential of 0. The Prodigy series of VAV diffusers enhance traditional system design by adding the element of personal control. INTERNAL INSULATION - FIBERGLASS 1" (25mm) THICK, MIN. The airflow direction is reversed, and the terminal unit is supplied with an inlet attenuator to help lower sound KMC Controls BAC-8001 - SimplyVAV BACnet Cooling/Heating Single Duct VAV Controller (40 lb-in, 90 sec Actuator)- Model BAC-8001 is supplied with inputs, outputs, and sequences of operation for the following functions. For systems over 20,000 cfm, VAV systems are limited to 1. The Titus ESV is unique as it incorporates many design features that increase performance, decrease service and Aug 30, 2013 · This week's Titus Timeout discusses how to size VAV boxes. FT DENSITY WHICH MEETS THE REQUIREMENTS OF NFPA 90A AND UL181. The Titus ESV is unique as it incorporates many design features that increase performance, decrease service and An Energy-Efficient Solution for Small-Zone Control. General. V MNL. Section F Submittals. Price SRDV retrofit terminal units are designed for installation in rectangular ductwork to easily convert a constant volume system into a variable air volume (VAV) system. The thermostat senses the temperature in the room and sends signals to the controller. The Daikin single duct terminal units are at the core of today’s variable air volume (VAV) systems. The variable air volume (VAV) box Model MQTHI5 is our high performance single duct air terminal product line. Subject. Based on these signals, the controller adjusts MR. By applying the formula above, the resulting airflow rate can be calculated as follows: Q = 15 * √(0. A VAV system with the proper controls and setup will help the building owner realize large savings in energy usage. Title. 1 G3. Variable Air Volume Sidewall Diffusers . Johnson Controls Series Fan Powered Variable Air Volume terminals are available from 100 to 4600 cfm, offering tremendous flexibility to meet a wide variety of HVAC systems design requirements. Price - Corporate Communications. The Johnson Controls single duct units along with Figure 7: Single duct with reheat (3 stage electric), typical VAV control sequence Figure 4: Single Duct Terminal with water reheat coil Figure 5: Single Duct Terminal with water reheat Air Pathway Figure 6: Single duct with reheat (hot water coil), typical VAV control sequence Dual Duct VAV (TDS) Johnson Controls Dual Duct, Variable Air Volume units vary the airflow individually between separate hot and cold inlet ducts for highly accurate temperature and comfort control. Air distribution products include grilles, registers, diffusers and air terminal units (also called VAV boxes). 5 million cycles. Explain how VAV boxes should be ducted to minimize life cycle costs 4. Despite its simplicity, this device comes with many benefits and is an effective way to create small-zone comfort for building occupants. + All Price liner options. Dual Duct units have had a renewed interest of late due to the concern for IAQ requirements and how best to meet a buildings IAQ requirements. Overview. The DDC controller also sends a signal to an actuator that controls hot water flow to the hot water coil. VAV diffus-ers may be oversized. These systems utilize VAV boxes, also known as VAV terminals, to regulate the air flow rate to specific zones within a building. Q ≈ 10. Size VAV duct mains cost effectively 2. Item Model Unit Location Price Order No. They have an air handler (DX or Chilled Water) which supplies the VAV Boxes with fixed VAV SPECIFICA TIONS 031600. Our long-standing vision, traditional values, and the Price way of doing business are the cornerstones of our leadership position in the non-residential air distribution industry. On the Unit screen, visually scan each input field and enter those fields that are - VAV-6 - VAV-8 -VAV-IO -VAV-12 -VAV-14 -VAV-16 mm 406 508 171/2 mm 203 445 SINGLE DUCT AIR TERMINAL UNIT WITH ELECTRIC HEAT 6 3/4 [1187] Top View Nominal Width X Height 13. ©2022 Trane VAV-PRC012AC-EN Introduction This catalog includes parallel and series fan-powered VAV terminals, including standard and low height models. The DDC controller (attached to the VAV box) sends a response to the damper actuator. • VAV box Capacities range from 40– 4000 CFM in 7 sizes. delren. • BACnet/IP open communication and integration with most platforms. Schematic of pressure-independent VAV box with hydronic reheat. Series Fan Powered VAV (TCS) Download Engineering Guide. AHRI 880 and ETL Certified and Labeled to Meet Industry Performance and Safety Standards. Variable Air Volume (VAV) boxes come in several varieties, each suited for specific settings: Single-Duct VAV : The most common type, used in office buildings and schools, modulates airflow to control temperature. plenum return systems Figure 2. [7. Thermal Variable Air Volume Diffuser. Enable an integrated, connected, and sustainable future by combining room automation and variable air volume control in one VAV box. 4033. ‹À¤V*“'ìsòÚy`Q@a¤(¬ „m °Ñðöf0Ù8 ©MHØ Ñ=r Ò h bëÀP%³^ ¤[Ÿs'Ò/‘ ïw»÷µ Á` K 6 |s…ú ïx­$1 : -ýtMr WQ[”Zþ¯A© º áµ ¯¢© B°ë©2,4 1œBl,ëüÍ'l [[¬X š³â—yˆfi §àÀ¢| N"jX3 E9½ Sep 13, 2021 · A variable air volume (VAV) box, is a part of an air conditioning system. 03 inch W. T3SW. Material: Mild Steel. T3SQ-2. They will simply turn-down air flow to match the space load. The DDV is essentially two single duct terminal units fastened together with one common discharge opening. Unlike fixed diffusers used with VAV boxes, VAV diffusers won’t dump when turned down. Receiving Inspection Several different types of VAV diffusers exist, however most can be grouped into two models: Thermally Powered and Electronically Powered. VAV box and save configurations. xml ¢ ( Ä–ËnÂ0 E÷•ú ‘· 1°¨ªŠÀ¢ e‹Tú &ž Óø!{xý}' ¢ª ‚ Q7‘’™{ïq&Òd0Zë"Z‚ Êš„õâ. 13 states: “Minimum volume set points for VAV reheat boxes shall be 30% of zone peak airflow, the minimum outdoor airflow rate, or the airflow rate 2, 3, 4, 6, and 8 Sensible Cooling Coil with 5/8” Headers. See OSP-0302-10 for a list of approved controls. It is typically sized for 50% of the maximum primary airflow, which can result in lower noise levels, lower unit first costs, and reduced energy consumption when compared to a series fan power terminal. anteccontrols. The airflow sensor should be able to generate this signal with only 400 to 450 FPM [2. The air terminal units are capable of stand-alone operation, however, optimum functional benefits are levels are required and when VAV diffusers are at the end of a duct run where less static pressure is available. The SDV assembly is designed to accept Direct Digital Controls (DDC) for VAV pressure independent operation. After more than 60 years, Price remains a privately held family company with a deep heritage and commitment to innovation and service. Dual PK !X™¬u› ` [Content_Types]. Figure 1 VAV System Schematic 2 The VAV system works by automatically reducing or increasing the amount of cool air allowed into a space (zone). Johnson Controls Parallel Fan Powered Variable Air Volume terminals are available from 100 to 4100 cfm, providing flexibility in performance ranges to meet a multitude of system design requirements. Seriesfan-poweredterminalunit(VSCF) Figure3. Nov 12, 2023 · Operating on the principles of variable air volume, VAV systems adjust the flow of air based on demand, resulting in energy-efficient HVAC operation. Integrated 3:1 design that works in any system • Integrated design eliminates wiring multiple actuator components into one VAV box for simplicity. There are several different types of VAV and terminal boxes. Fan-powered single duct series with reheat. We would like to show you a description here but the site won’t allow us. Learn about the features, benefits, and applications of single duct, fan powered, and dedicated outdoor air systems. VAV. g. ell Honeywell Honeywell Honeywell ohnson Controls ohnson Contro s ohnson Controls Siemens Siemens Siemens Siemens Siemens Siemens Siemens Siemens Schneider Electric (TAC) Products Price Air Distribution Terminal Units Single Duct Terminal Box SDV – Single Duct Terminal Unit with 3/4″ Fiber Free Foam Liner, Controls Enclosure, Multi-Point Airflow Sensor for VAV pressure independent operation. The PCV uses either a field calibrated electric or PIC DDC controller to ensure that over or under pressurization of the duct will not occur. 1. E. The Price FDC, series flow, fan powered terminal unit, is designed to supply air volume to the occupied zone in response to a control signal. Johnson Controls single duct units offer the typical benefits provided by single duct units while performing at extremely low sound levels. Fan powered variable air volume terminals are a popular choice for heating and cooling perimeter zones. Terminal Units. The actuator opens the valve the coil receives hot water. A terminal unit is a device that regulates the volume of conditioned primary air from the central air handler to the occupied space. G. Max. controls supplied and mounted by price (ehp): digital controls (dig) pneumatic controls (pneu) unit options: nema1 controls enclosure (ps) disconnect switch (dsw) 20 gauge casing (20ga) hanger brackets (hb) bottom removable sensor (rs) brass airflow sensor gauge taps (gt) bottom access door: access door with screws (ad) access door with snap The RDV air volume control valve is used to control exhaust air in general room exhaust applications. VAV Box ₹ 16,000/ Piece Get Latest Price . • Units are tested by ETL Intertek in accordance with AHRI The Price Pressure Control Valve (PCV) is designed as a pressure control valve to regulate duct pressure in a Pressure Independent or Pressure Dependent system. Item Model Size Unit Location With today’s energy conservation and efficiency requirements, these VAV air terminals are designed for and are adaptable to any modern VAV requirement. 25 m/s] air velocity through the inlet collar. The terminal unit controls are supplied by the controls contractor and either factory or field mounted and wired. The simple design, relatively low cost, and high level of performance flexibility make rectangular silencers a reliable and cost-effective choice. Non-vav supply/return diffuser. VAV pressure independent operation. For information on these accessories please refer to the Terminal Units Accessories catalog. 2) • The power consumption of small fans (fan coils, WSHPs, fan powered VAV) is not regulated Parallel Fan Powered VAV (TVS) Download Specs. The staple of today’s HVAC system designer, VAV systems lower operating costs by using less central fan energy and less refrigeration energy. 1" w. Its strongest suits are the VAV box and silencer selection sections. V b3-865. • No annual fee and available for free download in Apple and Google Play stores. VAV terminal units for the supply air control in buildings with variable air volume systems and demanding acoustic requirements. We can quickly provide VAV boxes, dual duct boxes and fan powered boxes that are not in stock here because Price has over 175,000 sq ft of manufacturing space and 400 employees in Atlanta, Georgia ready to build your orders. Features such as advanced sensor technology, a wide range of product sizes and air flows, low sound levels, increased hot water coil selections, and innovative options establish Price as an VAV terminal box with reheat coil makes the adjustments to air flow and temperature to meet the temperature set point of each zone. Favorite. 5 inches of water column (in WC). View Product Details. Each meet a wide range of building applications. VariTrane™ variable-air-volume units (VAV) are among the industry leaders in quality and reliability and are designed to meet the specific needs of today’s applications. Price Order No: Rep PO: Customer PO: Job Name: Package Tag: Unit Location: Item Model Size Controller M otor Air Volume (cfm) Reset Min. Thermally Powered VAV Diffusers Thermally powered VAV diffusers, shown in Figure 1, commonly use thermal actuators to modulate the flow rate of supply air into a room according to a desired temperature setting. ke if fy we bc mh rl sa rz ix