# How Long Does 16 oz Propane Last in a Space Heater?

A typical 16 oz propane canister can power a space heater for approximately 5.6 hours, but the exact runtime can vary depending on the specific heater model and burn rate settings. To understand the nuances of propane usage in space heaters, let’s dive into the technical details.

## Calculating the Burn Rate

The burn rate of a space heater is the key factor in determining how long a propane canister will last. We can calculate the burn rate using the following formula:

Burn Rate = (Propane Volume) / (Running Time)

For a 16 oz (473 mL) propane canister with a runtime of 5.6 hours, the burn rate would be:

Burn Rate = 473 mL / 5.6 hours = 84.5 mL/hour

This means that the heater consumes 84.5 milliliters of propane per hour.

## Estimating Runtime for Larger Propane Tanks

To find out how long a larger propane tank will last, we can use the following formula:

Running Time = (Propane Volume) / (Burn Rate)

For example, if we have a 5 lb (2.27 kg) propane tank with a volume of approximately 18.2 L (640 oz), the running time on low would be:

Running Time = 18.2 L / (84.5 mL/hour) = 215.3 hours

Therefore, a 5 lb propane tank would last approximately 215.3 hours on a space heater with a burn rate of 84.5 mL/hour.

## Propane Canister Specifications

A 16 oz propane canister typically contains 473 mL of propane and has a pressure rating of around 370 kPa (54 psi). The canister is made of steel and has a threaded connection for attaching to the heater or other propane-burning appliance.

## Safety Considerations for Propane Usage

When using propane canisters and tanks, it’s essential to handle them with care to avoid accidents. Always follow the manufacturer’s instructions for connecting and disconnecting the canister or tank, and never overfill or use a damaged canister or tank. Additionally, it’s important to store propane tanks in a well-ventilated area away from heat sources and open flames.

## Factors Affecting Propane Consumption

The burn rate and runtime of a propane-powered space heater can be influenced by several factors, including:

1. Heater Model: Different heater models may have varying burn rates and efficiency levels, affecting the propane consumption.
2. Burn Rate Setting: Most space heaters offer multiple burn rate settings, which can significantly impact the propane usage. Running the heater on a higher setting will consume more propane.
3. Ambient Temperature: Colder environments may require the heater to work harder, leading to increased propane consumption.
4. Insulation and Airflow: The insulation of the space being heated and the airflow around the heater can affect the overall efficiency and propane usage.

## Conclusion

In summary, a 16 oz propane canister can power a space heater for approximately 5.6 hours, but the exact runtime can vary depending on the specific heater model and burn rate settings. By understanding the technical details and safety considerations, you can optimize the use of propane in your space heater and ensure efficient and safe operation.