Dimension of Fire Extinguisher: Sizes Chart for Garages
Fire extinguisher dimensions for a garage: what the rating, agent weight and gross weight mean, and how to measure the wall space before mounting.
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The grinder is unplugged, the solvent rags are in the metal bin, and the wall by the garage door is still bare. The dimension of fire extinguisher that fits that wall depends on the rating, the agent weight and the space the bracket needs, not on the size that looks right on a shelf.
A garage extinguisher is sized by its rating and its weight. The listings here run from a 2.5 lb unit rated 1-A:10-B:C to a commercial unit rated 4-A:60-B:C, and the height, width and gross weight decide whether it mounts where it can be reached without moving boxes or tools.
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Below: what each number on the label means, the sizes the listings state, how to measure the wall space, and the extinguishers that fit a garage.
First Alert Fire Extinguisher
A heavy duty commercial extinguisher, UL rated 4-A:60-B:C, measuring 6.0 by 6.0 by 16.5 inches and weighing 16.9 pounds, with a 12-year limited warranty.
Pros
- UL rated 4-A:60-B:C, the highest rating here
- All-metal construction with a commercial-grade metal valve
- Mounting bracket and color-coded pressure gauge included
- 12-year limited warranty stated
Cons
- Heaviest here at 16.9 pounds
- No discharge time stated
- Agent weight not stated
- Recharge needs a certified professional
Ougist ABC Dry Chemical Fire Extinguisher, 5 lb
A 5 lb ABC dry chemical extinguisher rated 2-A:10-B:C, with a carbon steel cylinder, a mounting bracket and a 6 year manufacturer warranty.
Pros
- Rated 2-A:10-B:C for Class A, B and C fires
- Carbon steel cylinder
- Mounting bracket, safety sign, operating guide and inspection card included
- 6 year manufacturer warranty stated
Cons
- No dimensions stated
- No discharge time stated
- Heavier than the Kidde at 8.27 pounds gross
- No UL rating stated
Kidde Pro 210 Commercial Fire Extinguisher
A rechargeable 4 lb dry chemical extinguisher rated 2-A:10-B:C, with a 13-15 second discharge time, a 12-18 foot range and 100 PSI operating pressure.
Pros
- Discharge time of 13-15 seconds with a 12-18 foot range
- All-metal construction with a metal valve assembly
- Rechargeable and reusable
- Rust and impact-resistant handle with easy pull safety pin
Cons
- No warranty term stated
- No bracket stated
- No dimensions stated
- Title lists 4 lb while the spec table lists 6.5 pounds
Feautte 2.5 lb ABC Dry Chemical Fire Extinguishers
A compact 2.5 lb ABC dry chemical extinguisher rated 1-A:10-B:C, with a 10-12 second discharge time, 195 PSI operating pressure and a wall-mount hook.
Pros
- Lowest gross weight here at 4.5 lb
- Wall-mount hook, arrow sticker and inspection card included
- 195 PSI operating pressure with a pressure gauge
- Rated for -40°F to 120°F operating range
Cons
- Lowest rating here at 1-A:10-B:C
- No warranty stated
- Briefest discharge time here at 10-12 seconds
- For small, incipient-stage fires only, per the listing
Dimension of fire extinguisher: what the rating and the size tell you
The rating is the first number to read. Class A covers ordinary combustibles such as wood, paper and textiles, Class B covers flammable liquids, and Class C covers energized electrical equipment. The numbers in front of the letters rank the size of fire the unit is rated for, so a 4-A:60-B:C rating outranks a 1-A:10-B:C rating on paper. A garage holds all three kinds of fire risk at once, which is why every listing here is an ABC dry chemical unit.
| Listing | Rating | Agent weight | Gross weight | Discharge time |
|---|---|---|---|---|
| Kidde Pro 210 | 2-A:10-B:C | 4 lb | 6.5 pounds | 13-15 seconds |
| Feautte 2.5 lb | 1-A:10-B:C | 2.5 lb | 4.5 lb | 10-12 seconds |
| First Alert PRO10 | 4-A:60-B:C | Not stated | 16.9 pounds | Not stated |
| Ougist 5 lb | 2-A:10-B:C | 5 lb | 8.27 pounds | Not stated |
The title weight and the spec table weight are not the same number. The title weight is the dry chemical inside the cylinder, while the spec table weight is the whole unit. The Kidde title lists 4 lb while the spec table lists 6.5 pounds, the Feautte title lists 2.5 lb against a 4.5 lb gross weight, and the Ougist title lists 5 lb against 8.27 pounds. Compare the ratings as stated, and judge the bracket by the gross weight, since the wall holds the whole unit, not the powder alone.
Discharge time and range decide how the unit behaves in use. The Kidde lists a discharge time of 13-15 seconds with a range of 12-18 feet at 100 PSI, while the Feautte lists 10-12 seconds at 195 PSI and tells the user to aim from about 6 ft away. The First Alert and Ougist listings state no discharge time, so compare them on rating and weight instead.
How to measure the space before you buy
Measure the wall space before ordering, not after the box arrives. The First Alert PRO10 measures 6.0 by 6.0 by 16.5 inches, so it needs a tall, clear stretch of wall. The other listings state no dimensions, so check the listing for the size you choose before planning the mount.
- Pick the spot by the exit. Mount the extinguisher near the garage door, visible, with the gauge facing out, so it can be reached on the way out.
- Check the bracket. First Alert, Feautte and Ougist include a bracket or hook; the Kidde listing states no bracket. The Feautte kit adds a wall-mount hook, an adhesive location arrow sticker and a monthly inspection record card, while the Ougist kit adds a mounting bracket, a safety sign, an operating guide and an inspection card.
- Check the gauge. The Feautte listing supports monthly inspection with its pressure gauge, safety pin, tamper seal, hose and label. A gauge that has dropped needs attention before the next job, not after.
- Mind the cold. Feautte states an operating range of -40°F to 120°F and Ougist states storage temperatures from -40°F to 120°F, so a garage that freezes in winter stays inside the listed range.
- Match the weight to the wall. The First Alert PRO10 weighs 16.9 pounds, against 4.5 lb gross for the Feautte, so the heavy unit needs a solid mount, while the light unit puts less load on its hook.
Fire extinguishers for the garage
The measurements above decide the fit, and these are the units the listings describe, from the compact 2.5 lb Feautte to the 16.9 pound First Alert PRO10.
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FAQ: garage tools
What size fire extinguisher do I need for a garage?
It depends on the garage and the fires it may hold. The listings here run from a 2.5 lb unit rated 1-A:10-B:C to a commercial unit rated 4-A:60-B:C, with 4 lb and 5 lb units in between. A larger rating covers a larger rated fire, and a heavier unit needs a stronger mount.
What does 2-A:10-B:C mean on a fire extinguisher?
The letters name the fire classes: A for ordinary combustibles such as wood, paper and textiles, B for flammable liquids, and C for energized electrical equipment. The numbers rank the size of fire the unit is rated for in each class. A 2-A:10-B:C unit is rated for common, flammable liquid and electrical fires, as the Kidde listing states.
How big is a 5 lb fire extinguisher?
The Ougist 5 lb unit weighs 8.27 pounds gross, and the listing states no height or width. The 5 lb figure is the dry chemical inside, not the whole unit. Check the listing for dimensions before planning the wall space, since the bracket holds the gross weight.
Where should a fire extinguisher be mounted in a garage?
Near the exit door, visible, with the gauge facing out, so it can be reached on the way out. The Feautte kit includes an adhesive location arrow sticker and the Ougist kit includes a safety sign, both meant to mark the spot. Keep it clear of boxes and tools so nothing blocks the reach.
How long does a fire extinguisher discharge?
It depends on the unit. The Kidde lists a discharge time of 13-15 seconds with a range of 12-18 feet, while the Feautte lists 10-12 seconds. The First Alert and Ougist listings state no discharge time. Seconds run out fast, so aim at the base of the fire and sweep side to side, as the Feautte instructions describe.
Do garage fire extinguishers need a gauge check?
Yes. The Feautte listing supports monthly inspection with its pressure gauge, safety pin, tamper seal, hose and label, and includes a monthly inspection record card. First Alert and Ougist also list a pressure gauge on the unit, so the gauge is the check to make. A gauge that has dropped needs attention before the next job.
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