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6 Hour Safety Shutdown

This is a standard feature on all Ambient Technologies and Signature Command™ system remote controls. When this feature is in the ON position, the fireplaces or stove will shut down after six hours if no function is sent.

7 Day Programmable Thermostat Remote Control

This 5/2 function allows you to program your thermostat setting for Monday through Friday (5) and on the weekend (2). Program up to four On/Off times per day.

A/C Receiver

This 110V receiver for remote control systems plugs in and does not require batteries.

AFUE Rating

Annual Fuel Utilization Efficiency rating. This measures how much of each dollar spent on fuel actually goes toward heating your home. This rating is an average taken over the course of the entire heating season.

Air Control / Air Inlet Control

The way the amount of air entering the air inlet is regulated.

Air-Cooled Chimney

A double- or triple-walled system that uses outside air to reduce the surface temperature of the chimney.

Airtight Stove

A stove type that allows you to put out a large fire by closing all the air inlets.


The ratio of air to fuel in an appliance that burns solid fuel. The typical amount of air necessary to burn one pound of wood is 35 pounds.

Air Tubes

Air tubes supply secondary air for the firebox, which is required for the re-burning of gases created by the combustion process. Air tubes ensure more complete combustion for a cleaner burn.

Airwash System

An engineered process that helps keep your stove window clean automatically. The system requires 30 minutes of burning at maximum temperature to work properly.


Decorative iron posts that elevate the logs to a height just above the floor of the fireplace, supporting the logs and helping to keep them from rolling out of the firebox. Andirons also allow air to circulate around the log set, enabling proper burning with minimal smoke.

Ash Drawer / Ashpan

Provides easy cleanup for wood-burning stoves by collecting the ash in a removable pan or drawer built into the stove's design.

Back Puffing

Back Puffing occurs when a negative pressure draft is created in a venting system.


Baffles improve overall efficiency and temperature distribution by creating a secondary combustion chamber inside the firebox. Baffles help re-burn combustion gases and reflect heat back into the firebox.

Basic Wall Thermostat

Ambient Technologies offers a variety of wall thermostats that are compatible with virtually all brands and models of hearth appliances. These basic units provide a way to manually set and maintain temperature in the rooms surrounding your stove or fireplace.


A motor-driven fan that pushes warm air from your fireplace into the surrounding room.

Blower Temperature Sensor / Fan Temperature Switch

A heat-activated thermo-disc that expands and contracts to turn the blower on and off.


British Thermal Unit. Measures how much heat is required to raise the temperature of a pound of water by one degree Fahrenheit. BTU values are used to describe the heating capacity of a stove or fireplace in order to determine the amount of square feet it can warm.


A pan or tubes installed in gas stoves and fireplaces to deliver gas for combustion. The burner is placed under the log set or under the glass beads or stones that replace traditional logs in some contemporary fireplaces.

Burn Rate

The number of pounds of fuel consumed in one hour of combustion.

Cast Iron

Proudly handcrafted in the USA, all Vermont Castings cast iron hearth products are made from recycled and reclaimed metal using environmentally friendly sand molds.


Known in wood stoves as "Cat" for short, the Catalytic combustion process uses a honeycombed ceramic chamber coated with a metal catalyst to increase the rate of combustion and lower the burning temperature of the wood. Vermont Castings makes catalytic wood stoves with the highest EPA ratings in the industry.

Ceramic Fiber Logs

Ceramic fiber is a lightweight compound that is used to create realistic looking log sets for gas-burning hearth products. This delicately featured material gives off a natural red glow when exposed to gas flame.

Ceramic Glass

A superior alternative to tempered glass, which can burst at higher temperatures. Ceramic glass is tested and certified to withstand high temperatures while allowing heat to radiate through its non-glare finish.


Cubic Feet per Minute. Used as a measurement of blower strength.


A specially designed structure that encloses portions of the chimney on the exterior of a house.


The last part of a venting system, through which exhaust gases are vented to the outside of the house.

Chimney Connector

See Flue Collar.


Clearance the minimum distance required between a stove or fireplace and any combustible materials as defined in your local fire and building codes.

Combustible Material

Wood, paper, natural and synthetic fibers, plastics, etc. that will ignite or burn. Combustible materials must be identified to determine minimum required clearance for walls, floors and ceilings that surround an installed stove or fireplace.


The rapid oxidation of fuel that gives off heat and light—i.e., burning.

Combustion Air

See Primary Air.

Combustion Chamber

The dedicated space in a stove or fireplace where combustion occurs. This area consists of the burner, a brick liner, and a firebox with a sealed glass door.

Convection Heat

The process that circulates heat throughout the room using the natural air currents created by the transfer of heat energy from the surface of a stove or fireplace into the cooler air of the surrounding room.


Canadian Standards Association.

DC Receiver

Receiver for remote control systems that uses batteries for power.

Dip Switch

A switch inside a remote control's transmitter that allows you to change the transmitter's frequency when you want to use two remote systems at the same time.

Direct Vent

Direct Vent Gas stoves, fireplaces and inserts eliminate the need for a conventional chimney setup. These appliances draw air for combustion in from outdoors and exhaust outdoors as well using a pipe venting system. Direct Vent hearth products can vent out through the roof or wall of the house. These units come with sealed glass doors in order to maintain proper combustion efficiency and indoor air quality.

Draft Control Rod

A manually operated control rod that regulates the amount of air in a wood-burning stove or fireplace.


Efficiency for stoves and fireplaces is expressed as the percentage of heat that goes toward actually warming the room as opposed to being vented outdoors.

Electronic Ignition

Electronic ignition systems use electric current to light the fire, rather than a live spark.


Unburned smoke and gases that remain after the combustion process is complete. Vermont Castings wood-burning stoves produce fewer emissions; in fact, we offer 6 of the top 10 cleanest-burning stoves in the industry.


A high-gloss finish baked onto the outside of a cast iron stove. These durable, high quality finishes come in five colors: Biscuit, Majolica Brown, Ebony Black and Bordeaux.

EnerGuide FE Rating

An efficiency rating for vented gas stoves and fireplaces, established by the Government of Canada and the Heating, Refrigeration and Air Conditioning Institute of Canada (HRAI). The rating is based on actual use and performance of the appliance throughout the home heating season.

EPA Standards

US Environmental Protection Agency regulations for wood-burning stoves and fireplaces mandate that products sold after July 1, 1992 must emit no more than 4.1 g/hr for catalytic units and 7.5 g/hr for non-catalytic models. Vermont Castings wood-burning stoves meet this standard, offering 6 of the top 10 cleanest-burning stoves in the industry, including the highest rated catalytic and non-catalytic stoves available.


Unused by-products of combustion.

Factory Built Fireplace

A manufactured firebox inside a steel cabinet. These units can be installed in places where a built-in masonry fireplace does not exist.


See Blower.

Fiber Brick

See Refractory Brick Liner.


Intricately patterned ornamentation that adds to the design of a fireplace. These delicate patterns can be found in a range of styles and colors.


The airtight combustion chamber found in a stove or fireplace.

Fireplace Insert

Fireplace inserts can be placed inside a masonry fireplace or within a factory-built metal firebox. They are generally used to improve the efficiency of an existing masonry fireplace.

Flue Collar

The main point of connection between the vent and the chimney.

Flue Gases

See Exhaust.

Flue / Vent

The outlet for exhaust, generally leading outdoors.

Freestanding Stove

Traditional, stand-alone stove construction, designed to be placed out away from the wall. Freestanding stoves can have legs or rest on top of a pedestal.


The radio wave bandwidth that a remote control unit broadcasts on.


Gasketing effectively seals the firebox in stoves and fireplaces, improving efficiency and promoting optimal burning of the unit's fuel.

Gas Valve

The control that regulates the flow of gas going into a stove or fireplace.


A heavy platform made of cast iron or another metal, used to hold the solid fuel or the log set in a firebox.


The area surrounding a stove or fireplace, usually made from non-combustible brick or tile.

Hearth Extension

The portion of the non-combustible hearth that extends out beyond the front of the stove or fireplace.

Hearth Pad / Floor Protection

Wood-burning stoves and fireplaces require a set amount of non-combustible material to be placed under the appliance. The protective hearth pad must extend beyond all four sides of the unit. Refer to your product manual for specific requirements and installation instructions.

Heat Exchanger

A device that transfers heat between two fluid streams while keeping those streams physically separated.

Heating Capacity

The maximum number of square feet that a stove or fireplace can heat effectively.

Heat Input

The amount of heat that a stove or fireplace needs to heat a room, expressed in BTU per hour.

Heat Output

The amount of usable heat that stove or fireplace sends into the room, expressed in BTU per hour.

Heat Shield

Non-combustible material placed around a stove or fireplace or its exhaust pipes. Heat shields are used to absorb or reflect heat, reducing the minimum required clearance for installation.

Input Rate

The rate at which gas is supplied to a stove or fireplace.


Liquid Crystal Diode. Used in the display screen for remote control units.

Liquid Propane (LP)

Liquid Propane provides an excellent alternative to natural gas. Colorless and non-toxic, LP delivers a clean burn and does not damage the soil or water. You can purchase LP in pressurized cylinders for home use.


Narrow, parallel slats that overlap to allow for air circulation. Louvers add to the look of a circulating fireplace. A variety of decorative finishes are available.


A decorative shelf placed on the wall above a fireplace. Mantels can be made of brick, marble, wood, stone or concrete.


Term applied to various constructed items made from stone, brick or tile including mantels, surrounds, chimneys and hearths.

Millivolt Valve System

An ignition system found on gas stoves and fireplaces that uses a tiny internal generator (called a thermocouple) to hold the gas valve open for pilot and main burner operation. It uses the heat generated by the pilot light for energy, so appliances with a millivolt system are still operable during a power outage.

Mobile Home Approved

Signifies that a stove or fireplace is suitable for installation in a mobile home by offering reduced clearances, alternate venting systems or other special features.

Negative Pressure

Negative pressure situations can adversely affect the performance of a stove or fireplaces. These situations are usually caused by other appliances that draw air from inside the room, such as kitchen fans.


Often shortened to "Non-Cat" or "Non" — this combustion process found in wood-burning stoves uses airflow inside the firebox to re-burn smoke and gases instead of employing a catalyst. Vermont Castings makes the EPA's highest rated non-catalytic wood stove in the industry.


Oxygen Depletion Sensor.

Operating Range

The maximum distance from which a handheld remote control unit can be used to operate a stove or fireplace. Ambient Technologies offers remote controls with an operating range of up to 30 feet. These units are compatible with virtually all brands and models of gas hearth appliances.

Outside Air Kit

Install this kit to allow your stove or fireplace to combustion air from outside the house rather than from within the room. Recommended for well-insulated, tightly constructed homes.

Peninsula Fireplace

Peninsula fireplaces present a view of the flames from three sides.

Piezo Ignitor

Delivers an igniting spark by putting pressure on the crystal inside.


A small flame used to ignite the main burner on a gas stove or fireplace. "Standing" pilots stay lit at all times; however, Vermont Castings models with the Signature Command™ system allow you to ignite the pilot only when necessary. This environmentally friendly ignition method earns points for LEED certification and other "green" building programs.

Plinth / Hearth Riser

Used to raise an insert in an existing fireplace opening to create a better fit.

Primary Air

The air required for starting a fire and for maintaining optimal airflow. The flow of primary air is regulated using the stove's built-in draft control rod.

Primary Combustion

Primary combustion takes place when the stove or fireplace's fuel source is burned in the firebox, as opposed to the smoke, particles and gases that are burnt later.

Programmable Wall Thermostat

An expanded version of the basic wall thermostat, programmable models allow for different temperature levels to be set at different times throughout the day to maintain an optimal level of comfort. Ambient Technologies offers programmable wall thermostats that are compatible with virtually all brands and models of hearth appliances.

Protected Surfaces

Combustible surfaces that are covered by a non-combustible material.

Radiant Heat

Radiant heat travels outward from a central point, so the level of warmth rises the closer you get to the heat's source.


A receiver interprets the signal from a radio transmitter and indicates the desired function.

Refractory Brick Liner

Ceramic panels that line the interior of a gas fireplace, creating the look of traditional masonry. A range of brick patterns and colors are available to choose from.


A pressure device used to regulate the flow of gas.

Remote Control

A wireless handheld unit that conveniently allows you to operate a gas stove or fireplace from anywhere in the room. These units are available in 3 categories, including On/Off models, Thermostats and exclusive Signature Command™ system models that offer secondary control of other fireplace features. Ambient Technologies offers a wide variety of remote controls that are compatible with virtually all brands and models of hearth appliances.


An electrical switch that alters the speed of a blower fan by varying the amount of current flowing into it.

R Value

An expression of the insulation value of a material. For example, concrete possesses an R value of zero.

Safety Shutoff

This standard safety feature shuts off the supply of gas to the pilot and main burner if the ignition fails to light. Powered by a thermocouple, this system will work even in the event of a power failure.

Seasoned Wood

Properly seasoned wood has been allowed to dry anywhere from 6 to 12 months. Seasoned wood burns more easily and emits fewer particulates than freshly cut wood.

Secondary Air

Separate from primary air, secondary air is used to burn gases, smoke and particles inside the combustion chamber. Secondary air does not influence the rate of primary combustion.


A type of metal heat shield which affixes to a gas or wood stove to absorb heat and reduce clearances.

Signature Command™ System

An exclusive system that offers the most enhanced features and energy efficiency components on the market today. Signature Command™ features electronic ignition, a cold climate pilot option, automatic battery backup, and additional blower speed and accent lighting control. An innovative touchscreen thermostat remote control delivers complete convenience, and its unique Smart Mode® feature offers maximum efficiency.

Smart Mode®

Featured on Ambient Technologies Signature Command™ remote models TSFSC, TSFRSL and TSTSC, Smart Mode® adjusts flame height and spread automatically based on the current room temperature.

Spark Screen

Place this screen on the front of a wood-burning stove to allow for open-door fire viewing while still protecting the room from sparks and ash.

Spill Switch / Safety Shut Off Device

This temperature-sensing device automatically shuts off the pilot and main burner on gas appliances when a blocked flue or downdraft situation occurs.


The point of exit for combustion exhaust. This is the very last segment of the chimney system.

Termination Cap / Chimney Cap

A finished end cap that is mounted on a roof or wall chimney termination. Provides a finished look to the chimney while protecting the chimney system from intrusion by birds and other small animals.


A unit of heat measurement equivalent to 100,000 BTUs.

Thermal Efficiency

Thermal efficiency is expressed as the percentage of heat generated by combustion that is radiated through the appliance and out into the room as useful warmth.


The 30 MV thermocouple installed in some gas appliances acts as a small generator, using the heat of the pilot to power the appliance's safety shut-off device.


A small, disc-shaped temperature sensor that sends electrical current to the blower motor by bending when heat is applied.


A 750 MV internal generator that creates electrical current when heat is applied. It allows the valve coil to operate open or closed to send gas to the main burner.


See Basic Wall Thermostat and Programmable Wall Thermostat.


The touch-activated interface screen found on Ambient Technologies "T-series" remote controls.


A device that sends a radio signal to a receiver.

Trim Kit

Trim kits feature decorative bars that can be attached to the inside edge of a fireplace. Available in many different styles and finishes, these trim kits can create a distinctive look to match any décor.

Vent Free

Vent Free or Unvented gas appliances do not require an outside venting system to operate. They draw combustion air from inside the room and are designed to burn up to 99.9% efficiently, eliminating the need for outside exhaust. Vent Free stoves, fireplaces and inserts are approved for installation in most areas of the United States. Check with local building officials for approval in your area. These appliances are not approved for use in Canada.

Warming Shelves

These decorative and functional stove accessories can be attached to either side of a stove. The shelves come with mitten racks that can be used to warm clothes and other items by the stove.

Zero Clearance Fireplace

Zero clearance fireplaces are designed to be installed where there is no existing masonry fireplace. "Zero Clearance" denotes that these fireplaces can be installed in direct contact with combustible walls and floors. Their inner and outer shell construction allows for maximum heat insulation. They can be placed on any inner wall that allows for proper venting, making them quite popular for both renovations and new home construction. Zero clearance fireplaces are a relatively inexpensive way to add value to a home.