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Enervex RSHT 016 EFC/EcoDamper Wood Burning Chimney Fan System

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Perfect Fire. Any Fuel. ENERVEX provides a full line of listed, fully integrated residential venting systems for a truly one-stop design.

All products are manufactured by one manufacturer, which means our systems will work together seamlessly. No guesswork in the design process, and the flexibility to add what you need, when you need it.

At ENERVEX, one supplier takes full responsibility for the performance, efficiency and sustainability of your system with the best guarantees and warranties in the business.

Corporate History

Innovative Venting Designs. Engineered for Savings.

ENERVEX is a world-leading supplier of mechanical draft systems and integrated venting design solutions. We introduced the industry’s first mechanical draft fan in 1958 and today we deliver custom-built, one-stop venting systems from boiler outlet to chimney termination. ENERVEX serves North and Central America as well as the Middle East, operating from our 80,000-sq. ft. facility in Atlanta, GA. 

ENERVEX evaluates and builds every solution from the ground up with careful evaluation of the unique cost variables and long-term financial savings for each customer. Through superior manufacturing technology and decades of experience, we’re delivering high-quality, listed and certified venting solutions that are economical, environmentally sustainable, aesthetically pleasing, reliable, and code compliant. Backed by the best performance guarantee in the business.

All of our solutions are delivered under a single, highly respected name with full responsibility taken for operational excellence. That’s our performance guarantee, and the reason why the ENERVEX brand has been trusted by some of the most successful projects in the world.

Established in 1990, ENERVEX is based in Alpharetta, Georgia and operates in a number of countries with emphasis on the US, Canada, Central American and the Middle East.

The company's global business is 70 percent commercial (offices, healthcare, education, sports facilities, multi-family and mixed-use buildings, hotels and resorts) and 30 percent residential.

Since the invention of the chimney fan, ENERVEX continues to bring innovative draft control and mechanical draft solutions to market:

  • Modulating mechanical draft systems (1991)
  • Modulating combustion air supply systems (1995)
  • True inline mechanical draft fans (2006)
  • Fan-powered flue gas economizers (2011)
  • Inline flue gas economizer with modular heat exchanger systems (2013)
  • Ultra-energy efficient, permanent-magnet motors – standard in most products (2015)
  • Single universal chimney systems listed for virtually all venting applications (2015)
  • High-temp, pressure & leak-resistant graphite gaskets for sealing fan/chimney joints (2015)
  • ONLY supplier with a 6-Month Performance Guarantee (ALWAYS)



Manual Draft and Damper System (EcoDamper - Solid Fuel)

An economical, sustainable and quiet draft solution for wood-fired fireplaces that saves energy and maintains safe and proper draft while protecting against dangerous chimney downdraft and fireplace spillage.

The environmentally friendly ENERVEX EcoDamper System is the first combined draft and damper system for use with wood-fired fireplaces, stoves etc.

The EcoDamper System quietly manages a perfect draft and prevents heat from escaping through the chimney when the fireplace is not in use. It eliminates the need for glass doors, opening up many new design options while allowing for a larger view area of the fire and a more natural look.

The system consists of the RSHT Chimney Fan, the Manual Fireplace Damper (MFD-S) and the EFC 211 Control.


  • Can be integrated into virtually any solid fuel fired fireplace or stove design design
  • Perfect draft saves fuel, eliminates spillage & carbon emissions
  • Protects against downdrafts and spillage
  • Chimney can be closed when fireplace is not in use, saving energy
  • No need for glass doors


  • Provides ambiance
  • Ensure proper draft & safe operating conditions at all times
  • Save fuel and energy
  • Get design freedom for virtually any chimney application
  • Discreet termination 

How it works:

The Eco Damper connects a draft and safety controller, the EFC211 to an RSHT Chimney Fan, the MFD-S Manual Fireplace Damper.

EFC211 Solid Fuel Fan Controller

The EFC 211 is a draft controller that is used with wood-fired appliances such as fireplaces, stoves and pizza ovens.

It consists of a control box and a speed control unit. The control box is typically installed on the outside of the chimney or inside an attic, while the speed control unit is installed in the room where the heating appliance is located. When used with a solid-fuel fired appliance a smoke detector and an audible alarm shall be installed in accordance with NFPA 72, National Fire Alarm Code.

The control constantly monitors the chimney fan operation. It measures the motor's current draw to dertermine if there's adequate draft to the chimney. It is used with RSHT and GSV fans and is for indoor installation only. Typical uses are:

  1. controlling the speed of a chimney fan used with a wood-fired fireplace or stove; or
  2. controlling the speed of a chimney fan used with a wood-fired pizza-oven in a restaurant kitchen.


  • Safety control for monitoring of solid fuel applications.
  • Use with RS-HT Chimney Fans and GSV Grease fans.
  • Easy-to-use control display
  • Light showing proper operation
  • Warning light
  • Complies with Building Codes


RSHT 016 Chimney Fan

Tired of smoke getting into your eyes? The RSHT is the cure. It will literally suck the smoke out from the chimney flue  This high-temperature exhaust fan is typically used in venting solid-fuel fireplaces, BBQs, pizza ovens and stoves.

Installation is clean and easy - and the fan's compact design is barely visible from the ground level. The fan can be recessed or hidden behind the chimney top enclosure.


  • Quiet Operation
  • Variable-speed motor
  • Use with solid-fuel fired appliances
  • Comes in 4 sizes
  • Complete fan and control package available from a single manufacturer
  • Low operating costs
  • 6-months Performance Guarantee
    MFD-S Manual Fireplace Damper

    The MFD-S Manual Fireplace Damper for solid fuel prevents excess heat from escaping through the chimney when the fireplace is not in use, and prevents backdraft down the chimney. It is designed for chimney top installations.

    The MFD-S is a manual operated and gravity activated fireplace damper for round chimneys. Although it is designed to support and function with an ENERVEX chimney fan, it works equally well without it. It can be used as a replacement for worn-out, zero clearance fireplace dampers.

    The damper is operated with a pull chain and handle (included) mounted in the fireplace. 

    The MFD-S is designed for chimney top installations and is rated for temperatures up to 1400°F (760°C).


    • Saves energy
    • Easily operated via a pull chain
    • No power required
    • Fits most round standard chimneys


    Download EcoDamper Brochure here.



    Model EFC211, Solid Fuel Fan Controller
    Power Supply 1 x 120VAC
    Max Amperage 5.8 Amps
    Operating Temperatures -4°F to 122°F (-20°C to 50°C)
    Speed Control Output 10-120 VAC
    Listing Certification UL378 Standard for Draft Equipment
    UL508 Standard for Industrial Controls

    Model RSHT Chimney Fan
    Capacities 0-1,500 CFM (450-2,550 m3/h)
    Material Stainless Steel Housing and Axial Vane
    Drive Axial Vane
    Motor Variable Speed, TEFC, Class H
    Max. Temp Interm. 1400° (760°C), Contin. 1000°F (540°C)
    Listings UL 378 Standard for Draft Equipment
    UL 705 Standard for Power Ventilators
    CSA3-B255-M81 Standard for Mechanical Flue Gas Exhauster
    Model RSHT 016
    Discharge  Horizontal
    Fan Type Axial Vane
    Motor Type Totally enclosed, Variable speed, Class F
    Voltage   VAC 1x120V @ 60 Hz
    Amperage   Amps 4.40
    RPM  1580
    CFM at 0.0Ps 1460
    Motor Output  hp / kW  0.47 / 0.35
    Weight lbs / kg 47.2 / 21.4
    Dimensions A in / mm 15.7 / 400
    B x B in / mm 18.8 / 478
    C in / mm 17.4 / 441
    D in / mm 3.9 / 100
    E in 15.0 / 380
    Temperature Rating Interm. 1400ºF / 760ºC
    Cont. 1000ºF / 538ºC
    ***The RSHT is type-tested according to UL378 at 1000 °F flue gas temperature in 70 °F ambient temperature.

    Model MFD-S Manual Fireplace Damper
    Material Stainless Steel 316L
    Available Sizes 6
    Warranty 2-year Factory Warranty


    We complete our systems with the addition of a wide range of accessories. That is one of the advantages of working with a single manufacturer. No need to deal with multiple suppliers hoping everything will go together properly in the field.

    Click to see accessories

    MFD-S Manual Fireplace Damper

    This is an energy-saving, low profile, manually operated fireplace damper used as a component in a combined fan and damper system for use with solid-fuel applications only.

    SCA Steel Chimney Adapter

    The adapter used to provide support for the installation of an RS or RSHT chimney fan on a round steel chimney.

    ASCA Steel Chimney Adapter

    The adapter used to provide support for the installation of an RS or RSHT chimney fan on a round, air-cooled steel chimney.


    Click HERE to shop for more Accessories.