A kiln vent removes the fumes, odors and heat that come off a firing and sends them outside. For an electric kiln in a garage, basement or studio, a kiln vent system is one of the most useful add-ons you can buy. This guide explains why to vent a kiln, how downdraft and overhead hood vents differ, and how the main downdraft vents from Skutt, Orton and L&L compare on the figures their makers publish.
We are a research site and have not installed these vents. Specs come from maker manuals, brochures and product pages listed in the Sources line.
Why vent a kiln?
Clay and glaze give off gases as they fire. Water, burning organic matter, and sulfur in some clays all leave the kiln as fumes. Kiln makers give several reasons to remove them:
- Air quality: Skutt says its downdraft vent "removes fumes, odors and vapors," which it notes matters most with metallics and high-sulfur clays. L&L describes its vent as removing harmful fumes and improving air quality.
- Kiln life: L&L states that venting prevents corrosion in and on the kiln and extends the life of elements and electrical parts.
- Firing results: L&L and Orton both say downdraft venting improves temperature uniformity, and Skutt says it helps stop glaze colors migrating between pots.
- No lid propping: Skutt points out that without a vent, potters often prop the lid during early firing, which releases fumes straight into the room.
A carbon monoxide alarm in any room with a kiln is a cheap extra layer of protection, vent or not.
Downdraft or hood: how they differ
There are two main ways to vent a kiln.
A downdraft vent mounts under the kiln (or on the wall beside it). A small fan pulls a very small amount of air through holes drilled in the lid and floor, then out through a duct to the outdoors. Fumes leave from inside the kiln before they reach the room.
An overhead hood (a kiln vent hood, or simply kiln hood) hangs above the kiln and draws hot air and fumes from around it. Hoods move much more air and also remove radiant heat from the room, but they only catch what escapes the kiln, and they are larger to install.
| Feature | Downdraft vent | Overhead hood |
|---|---|---|
| Where fumes are caught | Inside the kiln | Above and around the kiln |
| Airflow (published examples) | 73 to 140 CFM | 265 or 500 CFM (Vent-A-Kiln) |
| Removes room heat | Little | Yes |
| Duct size (published examples) | 3 in | 5 in or 6 in |
| Kiln changes | Small holes drilled in lid and floor | None |
| Best for | Most home and garage kilns | Schools, hot rooms, several kilns |
Many studios use both: a downdraft vent for fumes and a hood or exhaust fan for heat.
Downdraft kiln vents compared
| Vent | CFM | Power | Duct | Kiln size | Warranty | Price |
|---|---|---|---|---|---|---|
| Skutt EnviroVent 2 | 140 | 115V, 1.4A | 3 in; 8 ft included | Up to 12 cu ft (24 with dual kit) | 2 years | Check price |
| Orton VentMaster | 73 | 115V, 1.1A or 208 to 240V, 0.5A | Not published in the brochure | One kiln (two with expansion kit) | Not published in the brochure | Check price |
| L&L Vent-Sure | Up to 130 | 120V, 1.37A or 220 to 240V | 3 in; 8 ft included | Up to 20 cu ft (two 10 cu ft kilns with Vent Doubler) | 3 years | Check price |
Skutt EnviroVent 2
The EnviroVent 2 is picked for its detailed manual and wide fit. Skutt says it fits Skutt 16, 12, 10 and 8-sided kilns and many other brands, and it can be added later without taking the kiln off its stand. A spring-loaded collection cup keeps a seal as the kiln expands and contracts.
The manual gives a hole-drilling chart by kiln size and says the duct can run up to 60 ft in 3 in duct before stepping up to 4 in. Skutt also says the exhaust outlet must be at least 4 ft from any window or door.
- Airflow: 140 CFM
- Electrical: 115V, 1.4A, 50/60 Hz; plugs into a standard outlet; in-line switch on the cord
- Kiln size: up to 12 cu ft; two kilns up to 12 cu ft each with the Dual Intake Kit
- Duct: 3 in; 8 ft flexible aluminum included
- Stand clearance: kiln stand needs at least 8 in under the kiln for the cup
- Warranty: 2-year limited
- Price band: not captured in our research; check the live price at Skutt dealers
Pros
- Highest CFM of the three
- Detailed install chart
- Fits many brands
Cons
- 115V only
- Needs 8 in of space under the kiln
Who should skip it: owners of kilns over 12 cu ft who do not want the dual kit, or kilns on low stands with no room for the cup.
Orton VentMaster
Orton, best known for pyrometric cones, makes the VentMaster. It is picked for flexible mounting: Orton says the motor mounts on the wall or floor with no kit, and the collector cup can attach to the kiln's side if the underside is blocked. It comes in 115V and 208 to 240V versions.
Its published 73 CFM is the lowest of the three. Downdraft vents only need to pull a small amount of air through the kiln, so a lower figure is not automatically a problem, but it leaves less margin on big kilns. Orton's brochure says no makeup air system is needed.
- Airflow: 73 CFM
- Electrical: 115V, 1.1A; or 208 to 240V, 0.5A
- Kilns: one; two at once with the Expansion Kit
- Hose: high-temperature hose included; up to 25 ft total with the Extender Kit
- Weight: 10 lb
- Listings: ETL and CE certified, UL listed motor
- Price band: typically $700 to $800 for the kit at Orton's list in October 2026
Orton's brochure lists a "4-foot High Temperature Hose" in its feature list but says one 3-foot hose is included in the box contents. Confirm the length with Orton or your dealer before planning the run.
Pros
- 115V and 240V versions
- Wall, floor or side mounting
- Light at 10 lb
Cons
- Lowest published CFM
- Shorter maximum duct run
- Warranty not stated in the brochure
Who should skip it: owners of large kilns or anyone with a long duct run to the outside wall.
L&L Vent-Sure
L&L's Vent-Sure is picked for its capacity and warranty. L&L rates it at up to 130 CFM for up to 20 cu ft of kiln, the most of the three, with a 3-year limited warranty. It is ETL listed to UL 499. A Multi-Mount bracket allows floor or ceiling mounting.
- Airflow: up to 130 CFM
- Electrical: 120V model draws 1.37A on a 6 ft, 15A cord with switch; 220 to 240V model also offered
- Kiln size: up to 20 cu ft; Vent Doubler handles two kilns up to 10 cu ft each
- Duct: 3 in; 8 ft flexible aluminum included; up to 60 ft with 4 bends
- Warranty: 3-year limited
- Price band: typically $830 to $960 at L&L's list in October 2026 (120V lower, 240V higher)
Pros
- Largest kiln capacity
- Longest warranty here
- 120V and 240V versions
Cons
- Highest list price
- Sold through L&
- L dealers, not mass retail
Who should skip it: owners of small test kilns, where a lower-cost vent covers the volume.
Kiln vent hood option: Vent-A-Kiln overhead hoods
Vent-A-Kiln builds overhead hoods sized to the kiln's diameter. Its models range from a 27 in hood for 19 to 23 in kilns up to a 54 in hood for 41 to 50 in kilns, at 265 or 500 CFM on 110V, with 5 in or 6 in duct and 10 ft of flexible hose included. Pricing is by quote.
Pros
- Removes heat as well as fumes
- No holes in the kiln
- Fits any kiln shape
Cons
- Larger install
- Catches only what escapes the kiln
- Quote-based pricing
Who should skip it: most single-kiln home studios, where a downdraft vent is simpler.
We did not find a Bailey-branded electric kiln vent on Bailey's site in October 2026. Olympic offers a vent hood as an option on some gas raku kilns through dealers.
How to vent a kiln safely
Follow the vent maker's manual for every step. In outline, a downdraft install involves:
- Unplug the kiln or switch off its breaker before any work on it.
- Drill the small vent holes in the lid and floor using the maker's chart. Skutt's chart uses 3/16 in or 1/4 in holes depending on kiln size, kept away from the thermocouple.
- Mount the collection cup under the kiln and the fan where the manual allows.
- Run duct to an outside wall. Keep the outlet at least 4 ft from windows and doors (Skutt's rule) and follow the maker's limits on length and bends.
- Plan makeup air. Skutt says a fresh-air source to replace vented air is essential; Orton says the VentMaster needs no makeup air system. Follow your own vent's manual.
- Close the lid and plug the peepholes during firing, as Skutt instructs, and keep the bottom shelf at least 1 in off the floor.
These vents plug into a standard outlet, but if you need a new receptacle, a wall penetration near wiring, or a vent control wired to the kiln, have a licensed electrician do it. Never run the kiln or the vent on an extension cord. Check local mechanical and building codes for exhaust outlets.
Kiln location matters as much as the vent; see our kiln placement and clearance guide and garage pottery studio guide.
Common kiln venting mistakes
- Venting into a garage, attic or crawl space instead of outdoors.
- Drilling holes bigger or more numerous than the chart says, which can cool the kiln unevenly.
- Placing pots right under a vent hole, which Skutt says can cause glaze discoloration or thermal shock.
- Exceeding the duct length or bend limits.
- Forgetting to switch the vent on before the firing starts.
What you need
If you are still choosing a kiln, buy the vent at the same time; Skutt, for one, says the holes can be drilled at the factory. Our best electric kilns guide compares the main models, and our Skutt and L&L brand guides cover their vent-ready options. For electrical needs, see best kilns for home pottery.
Sources: Skutt EnviroVent 2 product page and EnviroVent 2 installation manual; Orton VentMaster product page and VentMaster brochure; L&L Kilns Vent-Sure product page; Vent-A-Kiln overhead kiln ventilation systems page; Bailey Pottery home page; Clay-King listing for Olympic 23 Raku (vent hood option). Specs checked October 2026.