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3924 East Trent Avenue | Spokane, WA 99202
1-800-745-3282 | Fax: 509-535-9064
Ventilation Rescue Chain Saw - Unifire

Ventilation Saws

Engineered specifically for the fire and rescue industry, these ventilation saws have a number of features that make them outstanding tools for the fire and rescue industry. Ventilation saws should feature an advanced carbide tipped chain and have some sort of muffler guard.
Optional equipment for a ventilation saw would be a carrying strap and depth gauge.
Click To View Features

Ventilation Saw Specifications

Cylinder Displacement 74 cc (4.5 cubic inch)
Horsepower 6.5 HP
Noise Level 104 dB(A)
Fuel Tank Volume 1.62 US Pint
Oil Tank Volume .84 US Pint
No Load RPM 13,500
Weight Without Bar or Chain 13 lbs.


Yesterday we had the opportunity to use the new ventilation saw in some pretty adverse fire conditions and it performed very well. We used it to cut a hole in almost no visibility smoke conditions and it never missed a beat. It was used until it had a total of sixteen missing teeth, it still cut very well. We put almost 2 tanks of fuel through it on the Gardner fire. A few hours later and it again worked well in extreme smoke conditions on 9th. We were on the third floor in near zero visibility and it started and performed well. It is my hope that we purchase these to replace all our Cutters Edge saws.

-Corey, SFD

Ventilation Saw Models

Model Number Description List Price  
PS-16-SB 16" Univent Pro-Saw Ventilation Saw with Sabretooth Carbide Fire Department Chain $1,591.00 Add To Cart
PS-16COBRA55 16" Univent Pro-Saw Ventilation Saw with Carbide Cobra Chain $1,695.00 Add To Cart
PS-16DG-SB 16" Univent Pro-Saw Ventilation Saw with Carbide Sabretooth Fire Department Chain and Spring Loaded Depth Guage $1,916.00 Add To Cart
PS-16DGCOBRA 16" Univent Pro-Saw Ventilation Saw with Carbide Cobra Chain and Spring Loaded Depth Guage $2,026.50 Add To Cart
PS-20-SB 20" Univent Pro-Saw Ventilation Saw with Carbide Sabretooth Fire Department Chain $1,643.00 Add To Cart
PS-20COBRA66 20" Univent Pro-Saw Ventilation Saw with Carbide Cobra Chain $1,743.00 Add To Cart
PS-20DG-SB 20" Univent Pro-Saw Ventilation Saw with Carbide Sabretooth Fire Department Chain and Spring Loaded Depth Guage $2,048.00 Add To Cart
PS-20DGCOBRA 20" Univent Pro-Saw Ventilation Saw with Carbide Cobra Chain and Spring Loaded Depth Guage $2,179.00 Add To Cart

Extended Ventilation Saw Specifications and Features

General Specifications
  • Power head dry weight must not exceed 13 lbs.
  • Power head dry weight with 20" bar and chain loop must not exceed 19 lbs.
  • Power head must run on a 50:1 fuel oil mixture.
  • Saw must be single cylinder, 2 cycles with loop scavenging.
  • Saw must include: power head, bar, chain loop, tool kit, manual, 1 bottle of two cycle oil, 1 gallon of Hytac oil and bar scabbard.
  • Saw must have 180-day warranty.
  • Saw must meet Department of Labor General Industry Safety Standards Commission Safety Standard Part
  • 74 Fire Fighting standard R408.17442 (1) OSHA, ANSI, UL, EN, EPA-2 Standards
Powerhead Specifications:
  • Saw power head must have 4.5 cubic inch (74 cc) displacement with a 2.05-inch (52 mm) molybdenum impregnated bore and 1.34 inch (34 mm) stroke.
  • Power head must develop 6.5 horsepower at 8500 RPM
  • Power head shall idle at 2500 RPM and must obtain a maximum unloaded speed of 13,500 RPM.
  • Centrifugal clutch must engage at 3500 RPM.
  • Electronic Ignition must have lifetime warranty.
  • Carburetor must be an all position diaphragm type with integral fuel pump.
  • Carburetor must be air injected for improved performance.
  • Covered foam air filter to protect it from debris and water.
  • Carburetor must be isolated from the cylinder by vibration dampening rubber boot and isolating wall to prevent vapor lock.
  • Muffler must be side ported USFS and ANSI approved with spark arrestor.
  • Carburetor must be isolated from the cylinder by a fiberglass spacer, rubber boot and isolating wall to prevent vapor lock.
  • Muffler will not exceed 107dB at maximum RPM.
  • A heavy-duty .060" stainless steel plate must protect muffler.
  • Crankshaft shall be balanced three (3) piece drop forged.
  • Crankshaft shall be supported by two (2) drop groove ball bearings.
  • Piston shall be made from a low friction alloy.
  • Rod shall have silver plated needle bearings.
  • Cylinder shall have asymmetrical cooling fins and shall be cooled by a high capacity fan.
  • Power head must be isolated from handle assembly by six (6) "springs" to cancel vibration.
  • Saw shall have full wrap handle fro operator protection and safety.
  • Saw shall have rear hand guard.
  • Saw shall have large Billet Aluminum D-Ring handle for easy starting with gloves.
  • Saw must have safety inertia activated .10 second chain break that conforms to all ANSI standards.
  • Saw must have positive position on/off switch for safety. (Momentary switch is not acceptable.)
  • Power head shall have large fill caps.
  • Fuel tank volume shall be .71 pints.
  • Oil tank capacity shall be .41 pints.
  • Oil pump must be adjustable from 3 to 12 cc per minute.
  • Oil pump must be automatic with manual control, 3, 6, 9, 12 cc per minute.
  • Titanium roller bar.
  • Stainless Steel Depth Gauge.
  • Grease Gun & Grease
  • Fuel Tank & Tool Storage
  • Saw Strap
  • Eye Protection
  • Hearing Protection
  • Additional Chain Loops
    • 12" - 30" Bars
    • Chain Breaker
    • Chain Spinner
    • Chain Grinder
    • Bulk Chain
    • Saw Case
Bar Specifications:
  • Bar must be 1 piece precision ground with induction hardened and square polished rails.
  • Bar thickness shall be .200".
  • Slot must be milled .063 gauge.
  • Sprocket nose must be replaceable with single rivet fastening system.
  • Sprocket nose must have overlapping ear nose/body attachment.
  • Bar shall have specially designed .160" diameter oil holes to reduce plugging for fast cooler cutting.
  • Bar shall have wide tail contour.
  • Drive sprocket must be floating rim and drum, self cleaning and ported.
  • Drive sprocket must be 1.780 inches diameter.
  • Bar must be 16 or 20 inches long, with optional length bars available.
  • Bar must have 1 year wear warranty, excluding sprocket nose.
Chain Specifications:
  • Chain speed must be 121.6 Feet Per Second at 13,500 RPM.
  • Chain must be .404 pitch.
  • Chain drive link must be .063 gauge.
  • Chain must be C 11 carbide tipped.
  • Carbide must be Rockwell 92.3.
  • Carbide must have 537,000 lbs per square inch transverse rupture strength.
  • Carbide must have a 30 degree top plate angle.
  • Carbide must have a 15 degree hook angle.
  • Chain must have a .045 inch thick top plate.
  • Chain must have .060 inch thick side straps.
Depth Gauge Specifications:
  • Must be fabricated from Stainless Steel.
  • Must be spring loaded safety design.
  • Must be retrofitable to any 16" or 20" bar/powerhead combination.
  • Must be easily removed and installed with 2 nuts.
  • Nuts must be same size as bar nuts to facilitate the use of the bar scrench tool for gauge removal.
  • Gauge must cover the entire chain path.
  • Front guard must slide over back guard.
  • Must have handle to provide additional lifting position.
  • Must have angled foot to help guide the bar into the surface and to keep bar from hitting the ground in the starting position.
  • Must have maximum cutting depth of 5" on 16" bar or 7" on 20" bar.
  • Must have ruler in 1/4" increments.
  • Ruler must be printed on reflective material for night use.
  • Must be adjustable in maximum plunge depths at 1" increments.
  • Must have the ability to hold plunge depth at 1" increment from 1" - 5" on 16" bar and from 1" - 7" on 20" bar .
  • Must have the ability for minute adjustment from 0" - 5.5 "
  • Must be installed by drilling 2 holes in bar on 16" bar or 3 holes in bar on 20" bar - slotting of bar not acceptable.

Ventilation Saw Features

  • ET Series Engine (Extreme Torque)
    • High performance engine reduces fuel consumption up to 20% and emissions up to 60%. The saw produces up to 20% more horsepower than stock increasing torque over a wider RPM range when ventilating a roof or cutting/felling trees. The ET Series gives more power throughout the cut.
  • Ram Jet, Forced Air Injection
    • The specially designed flywheel removes 97% of debris from the air with centrifugal force and provides 35% more airflow around the engine than standard flywheels. The clean air is channeled to the carburetor housing, pressurizing it through force injection. The end result is higher performance, better air filtration, and a longer lasting and cooler running saw.
  • Superior Air Filtration Technology
    • The ventilation series saws combine the Ram Jet, Forced Air Injection System with a pure foam air filter, allowing 300% more airflow for heavy smoke and low oxygen environments. A pure foam air filter will not plug up in heavy smoke like paper or nylon filters.
  • Two Mass System
    • Ergonomically designed handles with, optimum spacing and an anti-vibration system minimize fatigue and provide an unsurpassed operator experience. The two-mass system isolates the saw's handles from the engine and cutting arm with steel springs, minimizing vibration transferred back to the operator. The weight of the saw is balanced evenly between the two handles.
  • Vortec-Excelerator Carburetor
    • All position Vortec-Excelerator Carburetor with ported and polished dual charged transfer ports and Vortec-Excelerator chambers. Built in auto-filter compensating system, provides extreme power and engine acceleration with low emissions and excellent fuel economy. This specialty unit is mounted using vibration-dampening system that is designed to prevent vapor locking in extreme heat situations.
  • Easy-Start Compression Relief Valve
    • The engine and starter have been designed for quick starts with minimal effort. Resistance in the starter cord is reduced by up to 40%. With the Easy-Start Compression Relief Valve, simply push the button, pull the cord, and as soon as the saw fires it is automatically reset to full compression.
  • Molytech Cylinder Head
    • Molybdenum impregnated and hardened aluminum/magnesium cylinder head with drop forged 74cc piston and moly-rings, increases compression, reduces heat and extends engine life. Allows the engine to run fuel with up to 15% alcohol content. This allows optimum performance from standard 87 to 92 octane fuels. Alcohol is added to standard fuel in order to meet emission standards set by the EPA and other city or state ordinances. Emission standards will vary depending on where you live. Alcohol burns three times hotter than gasoline.
      A proper gas and oil mix of 50:1 is recommended.
  • Exclusive Rescue Chain Technology
    • Exclusive to Unifire with over twenty-three years in the design and engineering, this chain can out-cut and out-perform any other chain on the market, period! We guarantee it. If you want safety, speed and durability, look no further. In hundreds of head to head tests, this chain won every time.
      Manufactured exclusively for Unifire and Univent by Carbide Chain of America.
  • Eliminator - Air Purge
    • The Eliminator air purge system removes air from the fuel lines, allows for faster starting and better performance. Fuel lines are alcohol resistant.
  • Hyper-Volt : Electronic Ignition
    • The smart brain of the Hyper-Volt electronic ignition senses when the saw is under load and advances the voltage to maintain higher performance through the cut.
  • Stainless Steel Muffler Guard
  • Advanced 2-Stage Air Filtration System
  • .404 .063 Heavy Duty Carbide Chain
  • Replaceable Sprocket Nosed Guide Bar
  • Inertia Activated Chain Break
  • Insulated Full Wrap Handle
  • Combined Choke and Throttle Lock
  • Dual 2 X 2 Transfer Ports
  • Side Chain Tensioning System
  • Carburetor Vapor Lock Isolation
  • Automatic Adjustable Oiler

Ventilation Chainsaw Accessories

Item Number Description List Price  
55SB 16", .404 .063 Sabretooth Chain $192.00 Add To Cart
66SB 20", .404 .063 Sabretooth Chain $237.00 Add To Cart
55COBRA 16", .404 .063 Cobra Chain $320.00 Add To Cart
66COBRA 20", .404 .063 Cobra Chain $358.00 Add To Cart
DG16 16" Spring Loaded Depth Gauge $562.00 Add To Cart
DG20 20" Spring Loaded Depth Gauge $629.00 Add To Cart
SNGB-16 16" Sprocket Nosed Guide Bar $138.00 Add To Cart
SNGB-20 20" Sprocket Nosed Guide Bar $138.00 Add To Cart
LGHT Flashlight That Attaches to Saw $39.00 Add To Cart
BRKT Flashlight Bracket, Used To Attach Flashlight To Saw $22.00 Add To Cart
STRAP Carrying Strap for Saw $72.00 Add To Cart
D-HNDL Heavy Duty D-Ring Handle, Black Molded Plastic $25.00 Add To Cart
D-HNDL-BILLET Heavy Duty D-Ring Handle, Billet Aluminum $42.00 Add To Cart
Item Number Description List Price  
M-PLT Muffler Plate $120.00 Add To Cart
MB-SAW Muffler Bolt $27.00 Add To Cart
HYTAC 1 Gallon of Bar Oil $13.00 Add To Cart
C-26PAC-1 6 Pack of 2 Cycle Oil, 2.6 oz. Bottles $14.00 Add To Cart
AF 100% Foam Air Filter for Latest Edition of the Pro-Saw $32.00 Add To Cart
TK Saw Tool Kit $41.00 Add To Cart
VSC Diamond Plate Ventilation Saw Case $667.00 Add To Cart
VSC-KIT Diamond Plate Ventilation Saw Kit
Includes: 6 pack of 2 cycle oil, 1 gallon of bar oil, bar scabbard, eye and hearing protection, tool kit, and aluminum diamond plated saw case.
$867.00 Add To Cart

100% satisfaction guaranteed: Unifire offers a 180 day limited warranty on its saws.