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Half of a high alumina 10" round shelf designed for small top-loading round kilns. Measures approximately 1/2" thick.
Pressed High Alumina kiln shelves are ideal for fast and high firings and exhibit exceptional durability to cone 11. Comparable to silicon carbide in strength but at a fraction of the cost. Pressed production of these shelves creates an extremely dense and strong shelf that resists warping. Offers extra protection against thermal shock due to rapid firing and cooling. The alumina content of these shelves is 11-12% higher than the cordierite shelves most commonly used by potters today. Great to use in Gas kilns. Not recommended for salt and wood firing. Also high alumina and corderite shelves are not recommended for raku firings due to extreme and uneven temperature. Please note: there is no warranty on refractories! There are many factors that can cause shelves to fail over which we have no control. It is the nature of the material. Other than shipping damages, no claims can be made on refractories.
Orton packages small cones in pairs to minimize breakage during shipping. This video shows how to Separate a pair of conjoined Small Orton Cones. Watch the PRODUCT VIDEO below to learn how to separate them.
Pyrometric cones measure heat-work (the effect of time and temperature). They are slender pyramids made from about 100 carefully controlled compositions. Each cone number is unique in measuring temperature within a small temperature range (less than 30°C). Cones measure the amount of heat absorbed over time. As the cone nears its maturing range, it softens and the tip begins to bend, drawn down by the influence of gravity.Junior cones are designed to be used in a KilnSitter.
Warning! Do not view cones above earthenware temperature with the naked eye as this may cause cataracts. View through welders goggles - sunglasses are not suitable as they filter out UV, but not the infra-red, which is the damaging wavelength in this case!
[click on the image thumbnails below to open/download the PDF for each]
Download SDS Sheet for Orton Cones
Half of a 15-1/2" round shelf designed for top-loading round kilns. Measures approximately 5/8" thick.
Pressed High Alumina kiln shelves are ideal for fast and high firings and exhibit exceptional durability to cone 11. Comparable to silicon carbide in strength but at a fraction of the cost. Pressed production of these shelves creates an extremely dense and strong shelf that resists warping. Offers extra protection against thermal shock due to rapid firing and cooling. The alumina content of these shelves is 11-12% higher than the cordierite shelves most commonly used by potters today. Great to use in Gas kilns. Not recommended for salt and wood firing. Also high alumina and corderite shelves are not recommended for raku firings due to extreme and uneven temperature. Please note: there is no warranty on refractories! There are many factors that can cause shelves to fail over which we have no control. It is the nature of the material. Other than shipping damages, no claims can be made on refractories.
A 21" round shelf designed for top-loading round kilns. Measures approximately 5/8" thick.
Pressed High Alumina kiln shelves are ideal for fast and high firings and exhibit exceptional durability to cone 11. Comparable to silicon carbide in strength but at a fraction of the cost. Pressed production of these shelves creates an extremely dense and strong shelf that resists warping. Offers extra protection against thermal shock due to rapid firing and cooling. The alumina content of these shelves is 11-12% higher than the cordierite shelves most commonly used by potters today. Great to use in Gas kilns. Not recommended for salt and wood firing. Also high alumina and corderite shelves are not recommended for raku firings due to extreme and uneven temperature. Please note: there is no warranty on refractories! There are many factors that can cause shelves to fail over which we have no control. It is the nature of the material. Other than shipping damages, no claims can be made on refractories.
These posts are safe to fire all the way up to cone 10. Square Kiln Post prices vary with height. If you have triangle posts, you can still use square posts in the same kiln load. It is more critical to make sure all of the posts under each shelf are the same height.
A 26" round shelf designed for top-loading round kilns. Measures approximately 3/4" thick.
Pressed High Alumina kiln shelves are ideal for fast and high firings and exhibit exceptional durability to cone 11. Comparable to silicon carbide in strength but at a fraction of the cost. Pressed production of these shelves creates an extremely dense and strong shelf that resists warping. Offers extra protection against thermal shock due to rapid firing and cooling. The alumina content of these shelves is 11-12% higher than the cordierite shelves most commonly used by potters today. Great to use in Gas kilns. Not recommended for salt and wood firing. Also high alumina and corderite shelves are not recommended for raku firings due to extreme and uneven temperature. Please note: there is no warranty on refractories! There are many factors that can cause shelves to fail over which we have no control. It is the nature of the material. Other than shipping damages, no claims can be made on refractories.
Pyrometric cones measure heat-work (the effect of time and temperature). They are slender pyramids made from about 100 carefully controlled compositions. Each cone number is unique in measuring temperature within a small temperature range (less than 30°C). Cones measure the amount of heat absorbed over time. As the cone nears its maturing range, it softens and the tip begins to bend, drawn down by the influence of gravity.Standard, or Large cones are used as witness cones to monitor the firing and verify temperature uniformity. A cone pack is necessary to support the cones during firing. If you have a kiln sitter on your kiln, you should use Junior cones.
Warning! Do not view cones above earthenware temperature with the naked eye as this may cause cataracts. View through welders goggles - sunglasses are not suitable as they filter out UV, but not the infra-red, which is the damaging wavelength in this case!
[click on the image thumbnails below to open/download the PDF for each]
Download SDS Sheet for Orton Cones
Use this silicon carbide kiln shelf cleaning block to remove glaze drips from kiln shelves. If glaze drips are left on a kiln shelf, they will melt again during firing and anything that comes into contact with it could stick to the shelf.
Pyrometric cones measure heat-work (the effect of time and temperature). They are slender pyramids made from about 100 carefully controlled compositions. Each cone number is unique in measuring temperature within a small temperature range (less than 30°C). Cones measure the amount of heat absorbed over time. As the cone nears its maturing range, it softens and the tip begins to bend, drawn down by the influence of gravity.Standard, or Large cones are used as witness cones to monitor the firing and verify temperature uniformity. A cone pack is necessary to support the cones during firing. If you have a kiln sitter on your kiln, you should use Junior cones.
Warning! Do not view cones above earthenware temperature with the naked eye as this may cause cataracts. View through welders goggles - sunglasses are not suitable as they filter out UV, but not the infra-red, which is the damaging wavelength in this case!
[click on the image thumbnails below to open/download the PDF for each]
Download SDS Sheet for Orton Cones
The LTL shipping option includes a 10% packing charge. This item is only available for pick up at our store or shipping via LTL Freight Carrier. It does NOT ship via FedEx/UPS/USPS. Please note: there is no warranty on refractories! There are many factors that can cause shelves to fail over which we have no control. It is the nature of the material. Other than shipping damages, no claims can be made on refractories.
The LTL shipping option includes a 10% packing charge. This item is only available for pick up at our store or shipping via LTL Freight Carrier. It does NOT ship via FedEx/UPS/USPS. Please note: there is no warranty on refractories! There are many factors that can cause shelves to fail over which we have no control. It is the nature of the material. Other than shipping damages, no claims can be made on refractories.
This item is only available for pick up at our store or shipping via LTL Freight Carrier. It does NOT ship via FedEx/UPS/USPS.
Please note: there is no warranty on refractories! There are many factors that can cause shelves to fail over which we have no control. It is the nature of the material. Other than shipping damages, no claims can be made on refractories.
A 13" round shelf designed for top-loading round kilns. Measures approximately 5/8" thick. Recommended for firing up to Cone 6. Please note: there is no warranty on refractories! There are many factors that can cause shelves to fail over which we have no control. It is the nature of the material. Other than shipping damages, no claims can be made on refractories.
A Critical component in the longevity of your kiln!
The Vent-Sure automatic kiln vent helps prevent corrosion on the inside and outside of your kiln. It ensures that your kiln gets the longest possible life from your elements and electrical components. This is so important that, if you do not have a Vent-Sure installed on your kiln, the pro-rated element warranty is in a different category.
Vent Blower
The vent blower motor is normally mounted with the 12" outlet protruding through the wall.
This keeps the heat of the kiln away from the motor (for long motor life) and keeps the motor vibration away from the kiln (which can cause ware to move, damage to the kiln, and misfiring of cones on a Kiln Sitter - if you have one).
Vacuum is safer than pressure
The vent tubing is kept under vacuum instead of pressure.
This insures that any leak in the tubing does not blow noxious fumes into your room.
External Venting is Better
External venting is safer and surer than venting to the inside of your kiln room (even with a filter).
Large Capacity
The blower vents up to 130 CFM (cubic feet per minute).
This will handle up to a 20 cubic foot kiln (and usually larger). More than one vent can be attached to a kiln.
Minimal Electrical Power Needed
The motor only pulls 1.37 amps.
Six Foot Power cord with On/Off Switch
The blower motor features a 6 foot long 120 volt 15 amp power cord. An On/Off switch is located on the cord.
240 volt models are available.
Adjustable Vent Control
A vacuum bypass on the kiln bypass/collection box adjusts the amount of venting from the system.
Don’t waste heat and energy by venting more than you need.
Adjust vent to kiln size.
15 feet of flexible aluminum duct
15 feet of flexible expandable aluminum 3" diameter duct is included along with necessary hose clamps.
Longer lengths or lengths of 3" stove pipe can be used as well.
Length can be as great as 60 feet horizontal or vertical with up to four 90 degree bends.
Three Year Limited Warranty
Because of our unique wall-mount fan we rarely replace fan motors.
MET Listed to UL499 Standards
The VENT-SURE Model VS-1 is c-MET-us listed for use with all c-MET-us listed L&L kilns. It is MET-us listed for all MET-us listed L&L kilns.
Optional Multi-Mounting Bracket
A special Multi-mounting bracket (M-V-MULT/00) is available to mount the vent motor on the floor or point the outlet vertically for ceiling installations.
Optional Vent Doubler
You can get a Vent Doubler option (M-V-VENT/DB) which allow you to vent two kilns that are each up to 10 cubic feet.
Optional Vent Controller to turn vent on and off with DynaTrol
The Vent Control will allow you to program the vent motor to turn on and off during the firing cycle.
NOTE: Vents made by manufacturers other than L&L may not be listed to UL499 standards if used with an L&L kiln. The same is true in reverse - the L&L Vent-Sure is listed to UL499 standards only with L&L listed kilns. If you have any question please contact the manufacturer of your non-L&L vent system.
Video, Specification Sheet and Instructions (PDFs downloadable through the L&L website)
VENT 2 KILNS W/ 1 MOTORNow you can vent 2 Kilns with one vent. The new 140 CFM Motor allows you to vent 2 kilns up to 12 Cubic Feet each, or one kiln between 12 and 24 Cubic Feet, with one Envirovent 2 Motor. WALL MOUNTED MEANS NO HEAT AND NO VIBRATIONThe new design is wall mounted. This moves the vent motor away from under the kiln so the motor is no longer exposed to the heat and can no longer transfer any vibration into the kiln. SPRING LOADED PLENUM CUP RETAINS SEAL THROUGHOUT FIRINGAs your kiln heats up the brick expands. When it expands the hot face of the kiln floor, the inside, expands more than the cold face or underside. This causes the slab to cup, or become slightly concave on the bottom. The result is that the center of the kiln floor moves upward at higher temperatures. The spring loaded cup follows the floor ensuring a tight seal throughout the firing process. NEGATIVE PRESSURE MEANS NO LEAKINGSince the vent is wall mounted it pulls the air through the duct work instead of pushing it. This means if you were to ever form a leak in your duct work the fumes would not be pushed into the room. ABILITY TO CONTROL WITH KILNMASTER OR GLASS MASTER CONTROLLERNow with the purchase of the new Skutt EnviroLink you can control exactly when the Envirovent 2 turns on and off during a firing on a GlassMaster or KilnMaster kiln. SAME QUALITY VENTINGThe EnviroVent 2 is a Downdraft Ventilation System designed to extract fumes from your electric kiln and vent them outdoors before they have a chance to enter the room. Because it is a DownDraft Ventilation System the EnviroVent 2 also improves the firing atmosphere in the kiln while it is protecting you from the odorous fumes that can be emitted from certain clay bodies and glazes when they are fired.
Download/view a PDF of the EnviroVent2 Installation Manual. A helpful installation video is also available in the Product Videos tab.
Here's How It Works
A designated number of holes are drilled in the lid and floor of the kiln either in the factory or on location. A spring loaded plenum cup (see diagram) is placed under the kiln and tensioned between the floor of the kiln and the floor under the kiln. The holes in the floor of the kiln are drilled in a tight pattern so the plenum cup can cover them all. The other end of the cup is connected by 3" ducting to a fan which is generally mounted on the wall. On the opposite end of the fan the air is ducted through the wall to the outside air. The plenum cup has 3 additional holes from which it draws room temperature air to mix with the heated air from the kiln. This serves 2 purposes. Since the kiln air is mixed with cooler room air the air coming out of the end of the vent is never hotter than an average hair dryer. Secondly, the holes in the plenum cup are sized to reduce the vacuum on the kiln chamber so only a small amount of air is moving through the kiln. This ensures the firing time is not affected and the ware is not at risk.
Better Heat Uniformity
Most people are aware of the fact that heat rises. The EnviroVent 2 helps compensate for this rising heat by creating a flow of air moving back down the kiln chamber. As the air moves in a downward direction it is also deflected by ware and shelves causing turbulence. This turbulence helps move heat to cooler areas of the kiln like the center.
Better Kiln Atmosphere
When you are firing in an electric kiln you are firing in an Oxidation atmosphere. The EnviroVent 2 helps bring in more oxygen and flush out fumes which can form a reduction atmosphere. A reduction atmosphere can be desirable in a gas or wood fired kiln however it only causes problems in an electric kiln. Your elements will last longer, your glazes will be clearer and brighter and you will help prevent glazes migrating between pieces.
Better Working Environment
Prior to the introduction of venting systems it was still necessary to vent the kiln. This was done by propping the lid open with a wedge of brick until the kiln reached 1000°F (538 °C). Not only was this inconvenient, it also radiated the fumes right into the room.
A Better Vent
A new benefit of the EnviroVent 2 is that it is now a Negative Pressure System. This means that since the motor is pulling the air instead of pushing the air, if there is ever a hole in the ducting the fumes will not escape into the room. Also since the motor is now mounted away from the kiln, the motor is not affected by heat from the kiln nor does the vibrations from the motor affect the ware in the kiln.
KILN VENTING FAQs
Why is room air venting important to people?Kiln manufacturers have always recommended that firing areas have adequate ventilation. There are many reasons why kiln venting stressed more now. Today's environmental consciousness has created more awareness of potential health hazards. Studies have shown that carbon monoxide emissions can exceed OSHA Threshold Limit Values during bisque firing of electric kilns. Formaldehyde and sulfur dioxide also may be present in lower concentrations. Because of these concerns, kiln venting is required by building code in most areas.
Why is internal kiln venting important to my ware?Ceramic and glass fusing materials, including greenware, glazes and lusters, contain organic compounds. The first phase of the firing process removes these gases or vapors from the ware before the higher temperature changes take place. These contaminants need to be removed from the kiln, and replaced with fresh air. This is especially important with red, orange, yellow and brown glazes and lusters, because they need oxygen for good results.
How does it work? It is unique because it creates a downdraft venting effect, immediately mixing fumes with cooling air in a closed plenum chamber at the bottom of the kiln. The venting requires a few very small holes to be drilled in the lid and floor of the kiln . The fan motor mounts to the wall and vents the fumes to the outside much like a household dryer.
Some specific problems related to poor venting include:
Grayish inner areas (black core) when bisque firing earthenware.
Unburned carbon in bisque ware that causes crazing, pinholes or blisters during glaze firing.
Dulled surfaces and cloudy colors caused by sulfur gases.
Weak colors in red-orange-yellow glazes.
Color migration caused by glaze fumes depositing on nearby ware.
Cones which fall improperly due to inadequate oxygen.
If your firing chamber is not properly vented, your work is likely to suffer.
Can you describe my kiln venting options? There are several options, ranked here in order of sophistication:
Natural ventilation from open doors and windows.
Room ventilation fans.
Convection canopy collection hoods.
Mechanical fan collection hoods.
Mechanical downdraft vent systems.
What is The EnviroLink?The EnviroLink is an accessory item that can be ordered for the EnviroVent and Envirovent 2 that works in conjunction with the Skutt KilnMaster or GlassMaster controller. It allows you to program the controller to automatically turn the vent on and off throughout a firing program. You simply enter an on/off setting for each segment of a Ramp and Hold program while you are programming the kiln. There are preset “vent programs” that can be run in conjunction with a ConeFire Mode or GlassFire Mode program as well.
What are the main differences between venting systems? Window ventilation and convection hoods are passive—the warm fumes rise, and hopefully, are diluted or escape. This requires very large volumes of fresh air, which is costly in the winter.
Collection hoods with electric fans do a better job of removing fumes, but fumes still enter the room air before they are collected. There is usually still a significant odor. External hoods do not help internal kiln performance.
Mechanical downdraft systems, such as the Skutt EnviroVent, were developed to address both needs:
Improved kiln firing chamber heat distribution and circulation for more consistent firing results; and
Removal of fumes directly from the firing chamber before they can post a health hazard. Little or no odor can be detected.
How much does heat distribution vary?A one-cone difference is common from top to bottom of an unvented kiln. You can observe this difference with cone groups set at different levels. The difference can grow great with larger electric kilns, especially when firing to low temperatures. For example, cone 03 has bent on a top shelf when only cone 05 has bent on a bottom shelf. Tests have shown a 30° difference top to bottom on high fires and 80° difference when low firing.
How much does the EnviroVent help heat distribution?Heat naturally rises therefore the bottom of the kiln can fire cooler than the top, especially at lower temperature ranges. On tests conducted on a 10 cu. ft. kiln with pyrometers at six levels, it was found that the EnviroVent can cut temperature differences to about half of normal. The top-to-bottom differential was cut from 79° to 45°. Some users have reported even greater improvement in heat distribution.
Does this require major Modifications to my kiln? No. You can use the twist drills we provide to bore though the soft firebrick by hand. The holes are quite small, shown here at actual size. As an example, the Skutt 1018 needs only two 15/64” holes in the floor and lid. We can pre-drill the kiln in the factory at the time it is ordered. Be sure to tell your distributor when ordering your new kiln that you want it drilled.
Is installation difficult? No. You drill the few holes needed for your kiln, place the EnviroVent 2 spring loaded plenum cup under your kiln and mount the motor to the wall. We supply the aluminum drier ducting that is used between the plenum cup and the motor. Skutt even supplies the stainless sleeve that is needed to pass through the wall.
It runs on 115V household current. If you install the EnviroVent on a kiln with a metal floor plate, you will need an electric drill.
Must I always turn on the EnviroVent when I fire? Yes. The airflow is necessary to cool the EnviroVent's electric motor. However, you will want to use the EnviroVent for all types of firings in any case.
Can I do burn-out firings?The EnviroVent was designed for conventional pottery techniques. A large load of burn-out pieces may momentarily overload the EnviroVent. We recommend smaller loads of burn-out pieces.
Can I rearrange my kiln area easily? Certainly, The vented air is cool enough to allow you to use flexible ducting away from the kiln. There are no overhead brackets or pulleys to restrict -your locations.
Does the EnviroVent change firing times? There may be a slight increase of 10 to 15 minutes to shut-off in an 8 hour firing. However, your total kiln firing cycle will probably be shorter because the EnviroVent removes heat from the kiln after shut-off without causing thermal shock.
What does the UL listing of a kiln vent system mean?It means that the manufacturer has submitted the vent unit, properly installed on specific kiln models, to Underwriters' Laboratories for rigorous testing under actual high-heat firing conditions. When installed on Skutt UL kilns, the EnviroVent is the only UL listed downdraft vent system.
Some kiln vents use an electric motor which may have been UL listed for general room temperature use. This does not make their vents UL listed.
Overview
7.0 Cubic feet
Double wall construction
Kanthal A-1 Elements
Sectional Design
208 or 240 Volts
60 Amp breaker required
3 Zone Control at NO EXTRA CHARGE
New Lid lifter Design at NO EXTRA CHARGE
The Cone Art Kiln model BX2327D is the most popular kiln that Cone Art produces!The large 7 cubic foot capacity makes it an ideal kiln for the busy home studio or school classroom.It is a double insulated kiln with 2.5" of premium firebrick plus 1" of block insulation around the outside circumference of the kiln. This double insulation saves approximately 30% in electricity costs and the jacket remains cooler. The perfectly designed Kanthal A-1 elements allow it to fire to come 10 with ease and the unique floor element ensures an even firing.Three-zone control with the Bartlett electronic controller comes at NO EXTRA CHARGE so the kiln will fire perfectly time after time. Now, also a standard feature, the Cone Art Lid Lifter at NO EXTRA CHARGE. Lift the lid with one finger!There is no kiln on the Market today that has as many excellent features at such a good price as the Tuckers Cone Art BX2327D.
Overview
5.83 Cubic feet
23.5″ wide X 22.5″ deep
Double wall construction
Kanthal A-1 Elements
Sectional Design
208 or 240 Volts
60 Amp breaker required
New Lid lifter Design at NO EXTRA CHARGE
CSA Approved
The 5.83 cubic foot capacity makes it an ideal kiln for the home studio or smaller school classrooms.
It is a double insulated kiln with 2.5" of premium firebrick plus 1" of block insulation around the outside circumference of the kiln. This double insulation saves approximately 30% in electricity costs and the jacket remains cooler. The perfectly designed Kanthal A-1 elements allow it to fire to come 10 with ease and the unique floor element ensures an even firing.Three-zone control with the Bartlett electronic controller comes at NO EXTRA CHARGE so the kiln will fire perfectly time after time. Now, also a standard feature, the Cone Art Lid Lifter at NO EXTRA CHARGE. Lift the lid with one finger!There are no kilns on the Market today that has as many excellent features at such a good price as Cone Art Kilns.
Orton received the Original patent in 1988 for Downdraft venting of Electric Kilns. Today Orton offers their most advanced Venting System “VentMaster” that is easy to install, prevents fumes from entering the workspace, makes sure there is enough oxygen in the kiln for colors to fully develop, improves the temperature uniformity inside the kiln and helps increase the life of the heating elements. Includes: Motor and Housing 4 ft. length of 2” diameter high temperature hose cast aluminum collection cup with spring loaded and threaded pedestal gasket instruction manual kiln safety manual ¼” drill bit vent cap samples of Orton Self-supporting pyrometric cones Cones and Firing pamphlet Motor Specs 115 Volt, 60 Hz, 1.1 amp household current, 73 CFM, shipping weight 10 lbs. CE Certified /ETL listed. Able to vent two kilns simultaneously with the addition of the Orton Expansion Kit. In 1988, Orton received a patent for downdraft venting of electric kilns. Since that time, downdraft venting has become the standard method used to vent fumes from electric kilns. With downdraft venting, gases are pulled out of the kiln near the bottom of the kiln and then mixed with room air and exhausted to the outside through a duct. Downdraft venting systems are considered better than hoods because they improve firing conditions in the kiln while removing essentially all fumes from the kiln room. VentMaster is capable of venting two kilns at once and is easy to install! The motor / blower is built from a non-corrosive, lightweight plastic that allows you keep it on the floor, or mount VentMaster to the wall! Why Vent My Kiln? All products fired in electric kilns contain organic materials that make carbon monoxide and other fumes when they are burned. Fumes released may contain sulfur oxides, hydrogen fluoride and metal vapors, depending on the products fired. Carbon monoxide and other fumes can affect the color and properties of the fired product if they are not removed from the kiln earlier in the firing. Red, green, gold and similar products are particularly affected by carbon monoxide at temperatures where the color develops. Removing released fumes from your work environment is very important, since these are unhealthy to breathe on a regular basis. Carbon monoxide can cause headaches and nausea and other potentially serious health problems. Why VentMaster? During operation, the KilnVent system keeps the kiln under a slight negative pressure. This pulls the fumes out of the kiln and pulls in a small amount of fresh air. Firing times are essentially the same. The fumes are exhausted directly into a duct system and removed from the kiln room. Improved air flow in the kiln results in more uniform temperatures, reducing hot and cold spots. Temperature Uniformity During several test firings without VentMaster, total temperature variances of 77° were produced due to the lack of air circulation. While firing with VentMaster, the temperature variance is reduced to 30°, over 38% more uniform. With the use of VentMaster, the hot air typically at the top of the kiln, is pulled to the bottom. The variance can be seen above for both scenarios. The firing cones (circled) can be visually compared to determine the approximate variance from top to bottom. Health and Safety Issues OSHA has set standards for carbon monoxide exposure of 35 ppm (parts per million) for long- term exposure and 200 PPM for short-term exposure. Independent testing has shown that fumes near the kiln can exceed 200 PPM near the kiln during the firing of greenware. This can cause headaches, fatigue, sore throats and nausea. When properly installed and operated, a downdraft vent removes ALL harmful fumes and provides a safer working environment. Regulations Most states and localities have set venting requirements for firing kilns in public places. Your local and state health board should have this information. The Uniform Mechanical Code lists accepted venting methods. The downdraft system made by Orton is listed in the 1992 approved Code. Orton downdraft vents have been certified by ETL (Intertek Testing Services NA, Inc.), an Internationally Recognized Testing Laboratory). VentMaster has earned the right to bear the ETL mark in the US, CETL in Canada and CE in European Markets.
