How long will a cylinder propane last period?

Propane weighs about 4.2 pounds per gallon. So a 20#cylinder holds 4 1/2 to 4 3/4 gallons of propane. A gallon of propane stores about 92,000 BTUH’s, (+/-). So in rough figures, if the head consumes 45,000 BTUH, you can get 2 hours per gallon, (8 hours per tank) or a bit more, when using on high. It’s just math: Med is 30,000, so 3 hours per gallon, low is 15,000, so six. Mine seems to run longer times than that, so I assume it’s burning at a somewhat lower rate than listed.

will it heat a 3 stall garage?

It will heat my 30' x 25' garage with 12' ceilings no problem, I have insulated walls but nothing for the ceiling. I have to turn it down after awhile, which the lowest setting is sometimes still too high, and I have to turn down the propane at the cylinder haha. I use it to keep the temperature at around 50 degrees when it is 20 or colder outside. But, though a bit costly, it really is a great heater...just keep it several feet away from plastic items.. I know from experience.

how much propane does this use when on high

Not sure how much per minute or hour but on high for a 20lb tank it last about 8 hours

How many hours of heat on low/high from a full 20lb tank?

This unit burns a lot of propane. On high, I get about 10 hours from a 7 gallon propane tank. Doing the math this burns about 1.413 hours per pound of propane. In general, all 30,000 BTU heaters will use the same amount of propane as any other 30,000 BTU heater. The number of BTU's produced from burning propane will be the same regardless of brand.

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Mr. Heater MH450T Tank Top Heater, One Size, Chrome

Product ID: 372322751

Details

Brand
Mr. Heater
Colour
Silver
Form factor
Mounted
Indoor/outdoor use
Outdoor
Special features
Adjustable

⏳9.5-hour runtime on 20 lb tank

🔄360° radiant heat + 180° swivel

🔥Up to 45,000 BTU power

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Description

🔥 Stay warm, stay ahead — heat your outdoor moments like a pro!

LONG LASTING WARMTH - Enjoy up to 9.5 hours of continuous heat on high, perfect for extended outdoor gatherings or work shifts.
SAFETY FIRST OPERATION - Equipped with a tip-over safety shut-off switch for peace of mind during outdoor use.
ADJUSTABLE HEAT SETTINGS - Customize your comfort with high, medium, and low regulator settings ranging from 30,000 to 45,000 BTUs.
360 RADIANT HEAT COVERAGE - Experience all-around warmth with a full 360-degree burner head and an extra 180-degree swivel for ultimate heat control.
PORTABLE TANK MOUNTED DESIGN - Mounts directly on a standard 20 lb propane tank for effortless portability and quick setup wherever you go.

The Mr. Heater MH450T Tank Top Heater delivers powerful, adjustable radiant heat up to 45,000 BTUs with a 360-degree burner and 180-degree swivel bracket. Designed for outdoor use, it mounts directly on a 20 lb propane tank for easy portability and offers up to 9.5 hours of runtime on high. Safety features include a tip-over shut-off switch, making it ideal for job sites, camping, or tailgating.

Specifications

ASIN	B01BE8FVUK
Brand Name	Mr. Heater
Color	Silver
Customer Reviews	4.7 4.7 out of 5 stars (4,847)
Form Factor	Mounted
Fuel Type	Propane
Global Trade Identification Number	00089301000629
Heat Output	45000 British Thermal Units
Heating Coverage	100 square feet
Heating Element	Radiant
Heating Method	Radiant
Included Components	heater
Indoor Outdoor Usage	Outdoor
Item Dimensions D x W x H	26.4D x 26.4W x 44.5H centimeters
Item Type Name	heater
Item Weight	5.62 Pounds
Manufacturer	Enerco Group Inc.
Max Temperature Setting	900 Degrees Fahrenheit
Model Number	MH540T
Mounting Type	Wall Mount
Number of Items	1
Number of Speeds	3
Part Number	F242540
Power Source	gas_powered
Recommended Uses For Product	Outdoor
Room Type	Outdoor
Special Features	Adjustable Temperature, Adjustable Tilt Head, Noiseless, Tip-Over Protection
UPC	089301000629
Unit Count	1 Count

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1410.51 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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