Propane heaters come as portable cylinder models, patio/tower heaters, mounted units, and whole-house systems. Output is measured in BTUs; selection depends on space, indoor vs outdoor use, and ventilation needs. Follow manufacturer instructions, use CO detectors, and check local permits for fixed installations.

Why use a propane heater?

Propane heaters give you portable, high-output heat where electric heat may be impractical: garages, workshops, patios, and temporary outdoor gatherings. Many units are self-contained and run from pressurized cylinders, so you don't need a gas line or dedicated circuit for a short-term solution.

Common types of propane heaters

Portable cylinder heaters

These run from small, removable tanks (commonly a 20-lb cylinder used for grills) and are easy to move. They include small radiant or convective models intended for spot heating in a garage or workshop.

Patio and tower heaters

Tall, freestanding patio heaters direct heat downward and radiate it across open-air seating areas. They are popular at restaurants and gatherings because they cover a wider outdoor footprint without hard wiring.

Wall, ceiling, and built-in units

Fixed units mount to a wall, ceiling, or floor. Many use forced air or ducting to distribute heat and typically need electrical power for blowers. These installations may require fuel lines, a vent or flue, and a permit or professional installation.

Forced-air and whole-house systems

Larger propane furnaces and unit heaters can serve whole garages or residences. These are permanent systems that use a stationary tank or bulk supply and must meet local building and venting codes.

Understanding output: BTUs

Propane heater output is measured in BTUs (British Thermal Units). Higher BTU ratings mean more heat, but how much you need depends on insulation, ceiling height, and whether the space is indoors or outdoors. Portable heaters can range from a few thousand BTUs to tens of thousands of BTUs; patio heaters commonly fall into the high-thousands to tens-of-thousands range .

Safety and installation notes

  • Only use heaters labeled for indoor use inside enclosed spaces. Many high-output patio and tower heaters are intended for outdoor use only.
  • Ensure adequate ventilation. Combustion appliances produce carbon monoxide; install a carbon monoxide detector in any occupied space where combustion appliances are used.
  • Permanently installed units usually require a permit, proper venting, and a licensed installer. Check local building codes before installing.
  • Follow manufacturer instructions for cylinder handling: store tanks upright, check for leaks with soapy water, and exchange or refill at reputable suppliers.

Fuel and tanks

Propane tanks range from small 20-lb cylinders (common for grills and portable heaters) up to large stationary tanks used for homes and farms. Refill and exchange options are widely available at service stations and propane suppliers.

Bottom line

Choose a heater type that fits the space and intended use: portable radiant or convective units for small spaces, tower/patio heaters for outdoor seating, and fixed or forced-air systems for permanent installations. Prioritize ventilation, carbon monoxide detection, and compliance with local codes.

  1. Confirm typical BTU ranges for portable and patio propane heaters and a safe guideline for matching BTUs to square footage or use-case.

FAQs about Propane Heater

Can I use a propane patio heater indoors?
No. Most patio and tower-style propane heaters are designed for outdoor use and should not be used in enclosed spaces. Use only units certified for indoor use and ensure adequate ventilation.
How do I choose the right propane heater size?
Match the heater's BTU output to your space, accounting for insulation and whether the area is open or enclosed. Portable units serve small areas; patio heaters cover open seating. For permanent systems, consult a professional for proper sizing and venting.
Are propane heaters safe in garages?
You can use propane heaters in garages only if the model is rated for indoor use, you provide adequate ventilation, and you have carbon monoxide detection. For attached garages and living spaces, consider alternatives or professional installation.
How do I check a propane tank for leaks?
Turn off the valve and apply a soapy-water solution to connections and valves. Bubbles indicate a leak. If you find a leak, move the tank outdoors, ventilate the area, and have a qualified technician service or replace the tank.
Do fixed propane heaters need a permit?
Often yes. Permanently installed heaters that require gas lines, venting, or electrical work commonly trigger permit and inspection requirements. Check with your local building department before installation.