Best Indoor Propane Heaters for Emergency Heat

When the power goes out in winter, a portable propane heater can keep your family warm when nothing else works. Unlike generators that must run outside, indoor-rated propane heaters bring warmth directly into your living space.

This guide covers the safest and most effective propane heaters for emergency home heating.

Quick Picks

Critical Safety Information

Before using any propane heater indoors:

1. Verify it’s rated for indoor use (has ODS)
2. Install battery-powered CO detectors
3. Provide ventilation (crack a window 1 inch)
4. Keep away from combustibles (3 feet minimum)
5. Never leave unattended while sleeping
6. Have a fire extinguisher nearby

How to Size a Propane Heater

General rule: 20-30 BTU per square foot

For emergency heating: You don’t need to heat your whole house. Focus on one small room. A 4,000-9,000 BTU heater handles most emergency scenarios.

Top Indoor Propane Heaters

Mr. Heater Big Buddy — Best Overall

The Big Buddy is the gold standard for indoor emergency heating. It can heat large spaces and runs on 1-lb cylinders or a 20-lb tank with an adapter.

Specs:

• BTU: 4,000 / 9,000 / 18,000 (three settings)
• Heating area: Up to 450 sq ft
• Fuel: 1-lb cylinders (2) or 20-lb tank with hose
• Runtime: 5.4 hours (high) to 108 hours (low) on 20-lb tank
• Weight: 17 lbs

Why it’s the best:

• Three heat settings for versatility
• Heats larger spaces than other portables
• Can connect to bulk propane tank
• Built-in fan for better heat distribution (requires 4 D batteries)
• Swivel regulators for easy tank connection
• ODS and tip-over safety shutoff

Drawbacks:

• Larger and heavier than Buddy
• Two 1-lb cylinders required for high setting
• Fan needs batteries

Best for: Families who need to heat a living room or large bedroom during extended outages.

Mr. Heater Buddy — Best Compact

The original Buddy is the most popular indoor propane heater for good reason. It’s compact, reliable, and perfectly sized for a bedroom or small space.

Specs:

• BTU: 4,000 / 9,000 (two settings)
• Heating area: Up to 225 sq ft
• Fuel: 1-lb cylinder or 20-lb tank with hose
• Runtime: 5.4 hours (high) to 108 hours (low) on 20-lb tank
• Weight: 9 lbs

Why we like it:

• Perfect size for emergency room heating
• Easy to carry and store
• Works with single 1-lb cylinder
• Can connect to larger tank
• Fold-down handle for compact storage
• Time-tested reliability

Drawbacks:

• No fan (convection only)
• Less powerful than Big Buddy

Best for: Single room heating, couples, apartment dwellers.

Mr. Heater Little Buddy — Most Portable

The Little Buddy is the smallest Mr. Heater, perfect for personal warmth in a small space.

Specs:

• BTU: 3,800 (single setting)
• Heating area: Up to 95 sq ft
• Fuel: 1-lb cylinder only
• Runtime: 5.5 hours per cylinder
• Weight: 5.85 lbs

Why it works:

• Extremely portable and lightweight
• Simplest operation
• Good for very small spaces
• Low fuel consumption
• Affordable price point

Drawbacks:

• Single heat setting
• Limited heating capacity
• Can’t connect to bulk tank

Best for: Personal heating, very small rooms, camping, travel.

Dyna-Glo 60K BTU — Best for Garages/Workshops

For large unheated spaces like garages or workshops, you need serious BTUs. The Dyna-Glo forced-air heater delivers.

Specs:

• BTU: 30,000-60,000 (adjustable)
• Heating area: Up to 1,350 sq ft
• Fuel: 20-lb propane tank (not included)
• Runtime: 14 hours (30K) to 7 hours (60K) on 20-lb tank
• Weight: 14 lbs

Why it’s powerful:

• Heats very large spaces quickly
• Forced-air design spreads heat
• Variable heat control
• Connects directly to propane tank
• Relatively quiet operation

Drawbacks:

• Requires electricity for fan
• Not rated for tight indoor spaces
• Higher fuel consumption
• Must use in ventilated areas

Best for: Garages, workshops, well-ventilated large spaces. NOT for bedrooms or sealed rooms.

Campy Gear 2-in-1 — Budget Portable

A more affordable option that doubles as a camp stove and heater.

Specs:

• BTU: 9,000 (heater mode)
• Heating area: Up to 200 sq ft
• Fuel: 1-lb propane cylinder
• Runtime: ~4 hours per cylinder
• Weight: 3.5 lbs

Why it’s versatile:

• Works as heater AND stove
• Very lightweight
• Affordable price
• Good for camping and emergencies
• Includes carry case

Drawbacks:

• Less safety features than Mr. Heater
• Not as well-tested for indoor use
• Smaller heating capacity

Best for: Budget-conscious buyers, camping crossover, small emergency backup.

Fuel Planning

1-lb Cylinders

• Pros: Portable, easy to connect, store anywhere
• Cons: Expensive per BTU, creates waste
• Best for: Short outages, portability needed

20-lb Tank with Adapter Hose

• Pros: Much cheaper per BTU, longer runtime, less waste
• Cons: Heavier, needs adapter hose ($20-30)
• Best for: Extended outages, home base heating

Runtime comparison (9,000 BTU setting):

Recommendation: Stock 10-20 1-lb cylinders for flexibility, plus one or two 20-lb tanks with an adapter hose for extended use.

Propane Storage Tips

• Store cylinders upright in a ventilated area
• Keep away from heat sources and direct sunlight
• Don’t store in living spaces or basements
• Check for leaks periodically (soapy water test)
• Propane doesn’t expire—stores indefinitely
• 20-lb tanks should be inspected every 10 years

Heater Maintenance

Before each season:

• Inspect burner and pilot for debris
• Check hose connections for cracks
• Test ODS by intentionally limiting airflow (heater should shut off)
• Clean exterior and control knobs
• Replace batteries in fan (Big Buddy)

After each use:

• Disconnect propane cylinder
• Store in dry location
• Protect from dust and debris

Related Guides:

• Power Outage Heating
• Winter Storm Preparedness
• Best Portable Generators
• Generator vs Power Station: Which Is Right for You?