Patio heaters
Mr. Heater Big Buddy PRO Specs: 18,000 BTU, Propane Runtime
Quick answer
The Mr. Heater Big Buddy PRO 18,000 BTU Portable Heater is rated at 18,000 BTU. On a 20 lb propane tank it runs about 23.9 hours on high and roughly 47.8 hours at half output. It listed at $146.48 when this page was compiled.
On this page
- What are the Mr. Heater Big Buddy PRO 18,000 BTU Portable Heater specs?
- What is the Mr. Heater Big Buddy PRO 18,000 BTU Portable Heater sized for?
- What features does Mr. Heater list?
- Who is the Mr. Heater Big Buddy PRO 18,000 BTU Portable Heater a good fit for?
- What are the alternatives to the Mr. Heater Big Buddy PRO 18,000 BTU Portable Heater?
- How do they compare on specs?
What are the Mr. Heater Big Buddy PRO 18,000 BTU Portable Heater specs?
| Spec | Value |
|---|---|
| Output | 18,000 BTU |
| Heat area | 450 sq ft |
| Mount | freestanding |
| Outdoor only | No |
From Mr. Heater's published specifications and the product listing.
What is the Mr. Heater Big Buddy PRO 18,000 BTU Portable Heater sized for?
| Tank | On high | At half output |
|---|---|---|
| 1 lb cylinder | 1.2 hr | 2.4 hr |
| 20 lb tank | 23.9 hr | 47.8 hr |
| 30 lb tank | 35.9 hr | 71.8 hr |
One pound of propane holds about 21,548 BTU. Only use cylinder sizes the manufacturer approves for this heater.
What features does Mr. Heater list?
Mr. Heater lists these features for the Mr. Heater Big Buddy PRO 18,000 BTU Portable Heater:
- Heats up to 450 square feet
- Low, Medium, and High heat settings: 4,000 / 9,000 / 18,000 BTU
- Heats up to 216 hrs. on two 20lb Propane tanks with optional hose (low setting)
- Big Buddy dual heating system combines radiant heat comfort with convection heat air flow
- Built-in high powered fan
- The use of un-authorized accessories/attachments with this heater are expressly prohibited, may cause serious injury, and will void the warranty.
Who is the Mr. Heater Big Buddy PRO 18,000 BTU Portable Heater a good fit for?
Best for garages, porches and enclosed patios. A portable radiant and convection heater with 4,000, 9,000 and 18,000 BTU settings rated to heat up to 450 sq ft, with a built-in fan. It sits in the Beginner tier of our patio heaters coverage. See how it ranks against the rest in the best patio heaters.
What are the alternatives to the Mr. Heater Big Buddy PRO 18,000 BTU Portable Heater?
Cuisinart Portable Tabletop Patio Heater, 11,000 BTU
$149.99An 11,000 BTU tabletop heater rated to warm about 30 sq ft, with an anti-tilt shutoff, burner screen guard and adjustable dial.
Best for: small balconies and tailgates
Check price on Amazon
Fire Sense 61130 Standing Propane Patio Heater, 48,000 BTU
$131.24A 48,000 BTU mushroom heater rated for an 18 ft heat diameter, with piezo ignition, a tilt shutoff valve and roughly 10 hours per 20 lb tank.
Best for: warming a dining set outdoors
Check price on Amazon
Amazon Basics 46,000 BTU Propane Patio Heater with Wheels
$162.74A 46,000 BTU freestanding heater rated for an 18 ft diameter with one-touch ignition, a tilt shutoff and a water box to weigh down the base.
Best for: a low-cost standing heater
Check price on AmazonHow do they compare on specs?
| Model | Price | Output | Mount | Heat area | Heat radius | Tank size |
|---|---|---|---|---|---|---|
 Mr. Heater Big Buddy PRO 18,000 BTU Portable Heater | $146.48 | 18,000 BTU | freestanding | 450 sq ft | - | - |
| Cuisinart Portable Tabletop Patio Heater, 11,000 BTU | $149.99 | 11,000 BTU | tabletop | 30 sq ft | - | - |
| Fire Sense 61130 Standing Propane Patio Heater, 48,000 BTU | $131.24 | 48,000 BTU | freestanding | - | 9 ft | 20 lb |
| Amazon Basics 46,000 BTU Propane Patio Heater with Wheels | $162.74 | 46,000 BTU | freestanding | - | 9 ft | 20 lb |
Frequently asked questions
Where do these Mr. Heater Big Buddy PRO 18,000 BTU Portable Heater specs come from?
The figures on this page come from Mr. Heater's published specifications and the product listing's own feature list. Sizing tables are our estimates from standard formulas, not measurements of a unit, and real results vary with conditions. Confirm details against the operator manual before you buy or use it.
Researched, not professional advice. This page is compiled from published specifications, manuals, labels and owner-review consensus, not hands-on testing. Follow the manufacturer's instructions and product label, and consult a qualified professional where safety, chemicals, fuel or structures are involved. As an Amazon Associate we earn from qualifying purchases.