Deep review

Mr. Heater MH15T review

Radiant propane heat that screws onto a cylinder, needs no power, and costs less than a cover for a tower. It is also work equipment, and it shows.

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We have not run this heater. What follows reads Mr. Heater's published specification, does the arithmetic its figures imply, and separates the maker's numbers from ours.

A small steel burner head with a reflector and a regulator, which threads onto the valve of a propane cylinder. There is no stand, no base, no cord and no cabinet — the cylinder is the stand. Mr. Heater publishes: 10,000 to 15,000 BTU per hour adjustable, propane, direct connection to a 5–20 lb cylinder, match lit ignition, 3.3 lb, 9 x 8 in, a tip-over safety shut-off, no thermostat, no electricity required, outdoor use only, and a 1 year limited warranty.

It is sold as job-site equipment. Mr. Heater's own listed uses run to construction sites, loading docks, sporting events, hunting, fishing and camping. Patios are not on that list, which is worth knowing before it arrives.

Quick picks

Ranked for fit, not for hype. Output is the maker’s published figure; reach is computed from it or from the maker’s own radius claim, and the table says which. Tap a row for the full write-up, or go straight to the listing.

#	Product	Best for	Output	Reach	Price
1	Mr. Heater MH15TThe cheapest way to buy propane heat that behaves like infrared rather than like warm air. It screws onto a cylinder, needs no outlet, and looks exactly like the job-site equipment it is.	Radiant propane heat, cheaply	15,000 BTU	750 sq ft	$49.99 · Check on Amazon-8%

Reach marked “claimed” is the maker’s own published figure. Reach without that label is ours, computed from published output at 20 BTU per square foot for an open patio. Neither is a measurement we took.

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Top pick · Radiant propane heat, cheaply

Mr. Heater MH15T Single Tank Top Propane Radiant Heater

The cheapest way to buy propane heat that behaves like infrared rather than like warm air. It screws onto a cylinder, needs no outlet, and looks exactly like the job-site equipment it is.

Fuel

Propane

Output

15,000 BTU/h

Reach (computed)

750 sq ft · 15.5 ft radius

Cost per hour

$0.44

Reach is ours, computed from published output at 20 BTU per square foot for an open patio. Cost at $2.674 per gallon of propane. A 20 lb cylinder runs it about 28.7 hours at full output. We have not measured any of this in person.

What works

• Radiant heat with no outlet required — the one combination electric infrared cannot offer and a convective propane tower does not deliver
• Wind barely touches it, for the same reason it barely touches electric infrared: radiant energy crosses moving air largely unaffected
• Our computed runtime from the published BTU range reproduces the 28 to 43 hour figure retailers quote for a 20 lb cylinder, which is a rare case of a published claim surviving arithmetic
• 3.3 lb and no base — it goes in a truck, and there is nothing to blow over in the sense a seven-foot tower can

What does not

• It is work equipment, not patio furniture. The maker's own listed uses are construction sites, loading docks, sporting events, hunting, fishing and camping. Patios are not on that list and the thing looks it
• Outdoor use only, stated plainly by the maker. No garage with the door part-open, no screened porch, no enclosure of any kind
• Match lit on this model, which in a breeze is genuinely annoying — the spark-ignition variants exist for a reason
• It sits at cylinder height, so it radiates at knees and shins rather than at a seated upper body. Aim is fixed by wherever the cylinder stands
• No published coverage figure, so any reach number for it is computed rather than quoted

Published specification
Rated input	10,000 to 15,000 BTU/h, adjustable
Heat type	Radiant, per the maker
Use	Outdoor use only, per the maker
Ignition	Match lit
Mounting	Screws directly to a cylinder; 5 lb minimum, 20 lb typical
Size and weight	9 x 8 in, 3.3 lb
Warranty	1 year limited
Maker’s coverage claim	None published — the reach figure above is ours
Safety listing	Tip-over safety shut-off switch per the maker; no third-party listing published

Who it is for

Anyone who wants radiant propane heat cheaply on an open deck, a driveway, a tailgate or a work area, and does not care what it looks like.

What it is not for

A furnished patio where appearance matters, anything enclosed or partly enclosed, or a seated group wanting heat at chest height.

$49.99 · Check on Amazon-8%

#ad · how this site is funded · price as of October 16, 2026

Sources for this entry

• Amazon listing — Mr. Heater MH15T single tank top outdoor propane heater
• Mr. Heater — MH15T published specification (10,000-15,000 BTU/h radiant, outdoor use only, match lit, 3.3 lb, tip-over shut-off, 9 x 8 in)

This heater occupies a genuinely empty square on the grid, and it is the reason to consider it at all.

Radiant heat normally requires electricity. Electric infrared is radiant — it warms objects and people directly rather than warming air — which is why it survives a breeze. But it needs an outlet, and a standard socket caps it at 1,500 W.

Propane normally gives you convection. A full-size tower burns gas and warms the air above it, which the wind then carries away. That is why towers disappoint on exposed patios no matter how many BTU they are rated for.

A tank-top burner is the combination that does not otherwise exist: radiant heat with no outlet. The element glows, the reflector points it at you, and wind barely touches it for the same physical reason wind barely touches an electric infrared unit. On a driveway, a tailgate or an open deck with no power, there is nothing else on this site that does that — the propane radiant roundup sets out the category properly.

Most people assume a cheap heater is an expensive heater to run. Here the opposite is true, and the reason is simply that it burns far less gas than a tower.

Read the bottom row twice. A full-size propane tower empties a cylinder in a single long evening and costs about $1.35 an hour. This runs three to four times longer on the same cylinder and costs about a third as much per hour — and on its low setting it is within a few cents of what a 1,500 W electric unit costs to run, without needing the outlet.

Several retailers quote 30 to 52 hours on a 20 lb cylinder. Our figures are 29 to 43, and the difference is worth naming: Mr. Heater's own product page publishes no runtime at all, so the retailer range is not a manufacturer claim and the upper end does not follow from the published BTU settings. Ours is computed from the maker's rated inputs and shown above so you can check it. The runtime page has the method for every cylinder size.

This is the limitation that decides whether it belongs on your patio, and it follows from the mounting rather than the burner.

The heater sits on top of a cylinder, so its height is fixed by the cylinder. A 20 lb tank stands roughly 18 inches tall, which puts the reflector somewhere around knee-to-thigh level. It radiates outward from there.

For someone standing — on a job site, at a tailgate, working on a car — that is fine, and it is who the product was designed for. For someone seated in a patio chair, the heat arrives at shins and calves and largely misses the torso, which is where cold is actually felt. A tower's reflector at seven feet radiates down across a whole seated person; this does not, and no amount of BTU changes the geometry.

Mr. Heater states the ignition is match lit. There is no piezo igniter and no battery spark, so lighting it means holding a flame to the burner while opening the gas.

The upside is real: there is no igniter to corrode, no battery to die, and nothing in the ignition path that can fail in year three. On an appliance this cheap, removing the most failure-prone component is not a cost saving so much as a design simplification.

The downside is equally real and arrives on the first windy evening, when a match will not stay alight next to a burner you are trying to flood with propane. A long-reach butane lighter is effectively required equipment. Mr. Heater's range includes spark-ignition tank-top models for exactly this reason, and if lighting-in-wind sounds like a daily annoyance, those exist.

The maker's specification says outdoor use only, and on this product that instruction deserves more weight than the usual boilerplate.

An unvented propane burner consumes oxygen and produces combustion products, and this one has no oxygen-depletion sensor in its published feature list — the tip-over shut-off is the safety device it does publish. There is no safe partial case to negotiate here: not a garage with the door up, not a screened porch, not a tent, not a partly enclosed patio. The clearances and ventilation page explains why those are two separate rules, and this appliance fails the second one indoors regardless of how much space is around it.

No third-party safety listing is published for it either — the maker names the tip-over switch and nothing else. If a named certification matters for where you intend to use it, that absence is the thing to weigh.

Anyone who needs radiant heat somewhere with no power: an open deck away from the house, a driveway, a workshop forecourt, a tailgate, a campsite. At 3.3 lb with no base, it goes in a truck and there is nothing to blow over in the sense a seven-foot tower can.

It is also the cheapest entry point to propane heat on this site by a wide margin — well under the bracket the under-$200 roundup covers — which makes it a low-risk way to find out whether radiant heat is what your space needed before committing to a mounted unit or a tower.

• Anyone wanting one heater for a furnished patio. Shin-height radiant heat is the wrong shape for seated people. A tower or a mounted electric unit is the single-heater answer.
• Anyone who needs it to look like patio equipment. It looks like what it is, and what it is is job-site kit.
• Anywhere enclosed or partly enclosed. Outdoor use only, and no oxygen-depletion sensor is published. This is not negotiable by degrees.
• Anyone who will resent lighting it with a match on a windy night. The spark-ignition models in the same range exist for that reason.
• Anyone who needs a named safety certification — none is published for this model.

An honest piece of equipment that does one thing nothing else here does, at a price that makes the decision easy. Radiant propane with no outlet, three to four times a tower's runtime per cylinder, about a third of its cost per hour, and a design with almost nothing in it to break.

What you accept is that it was built for people standing up outdoors, and it heats accordingly. Buy it for a deck with no power, a driveway or a truck, or as a cheap second heater aimed at the cold half of a seated group. Do not buy it expecting to furnish a patio with it.