How Much Propane Does A 18000 BTu Heater Use?

Here’s a simple chart that shows how much energy furnaces and heaters of various sizes consume. What is the propane consumption of a 30,000 BTU heater? Look at the graph!

Tip 1: Is the capacity of your heater not included on the chart? If the size isn’t listed, use the numbers to figure out how much propane your heater or furnace needs.

A 90,000 BTU furnace, for example, requires three times as much as a 30,000 BTU furnace, thus 3 x.328 =.98 gallons per hour.

A 120,000 BTU furnace consumes twice the amount of energy as a 60,000 BTU heater, therefore 2 x.656 = 1.3 gallons.

Tip 2: Consider whether the unit is always on. Also, do the math, which is detailed below. It will assist you in determining the length of time the heater will run dependent on the size of the bottle or tank it is powered by.

If you have a Mr. Heater Little Buddy without a thermostat or something similar, it will run continuously, hour after hour.

However, if your unit has a thermostat, and it ultimately heats the space to the desired temperature, it will turn off until the area cools and more heat is required.

In well-insulated homes, furnaces should operate three to six times each hour, with cycles ranging from four to twelve minutes. The fewer times it comes on, the longer the cycle is. In a home with adequate insulation, a furnace will operate roughly 24-36 minutes per hour on a 40-degree day.

You may only need to time the cycles of your furnace for an hour or two to get a true sense of how much it runs per hour.

Then you’ll have to do some math. Divide the length of time it runs in a normal hour, if one exists, by 60 to get the percentage of an hour it runs.

Then double that figure by the number of BTUs per hour used by a heater or furnace of that size. Consider the following scenario:

On a 20000 BTU heater, how long will a 20lb propane tank last?

Propane is a common fuel choice for folks who cook outside, whether on a camping vacation or just on a Sunday afternoon barbecue. A large 20lb propane tank is great if you are camping with your family or a large group and plan to carry a propane tank. But you’re probably wondering how long a 20-pound gas tank will last.

The 20lb Propane tank will last 21 hours at full burner flame when used with a standard 2-burner camping stove with a 20,000 BTU output. With a 20lb tank, this is the most usual equipment.

The run time will vary substantially if you use other devices with differing BTU rates. The run time of a full 20lb propane tank at most common BTU ratings is summarized in the table below.

If you want to utilize your propane tank at different BTU rates, I’ve designed a simple googlesheet tool to calculate the run time. Here’s where you can find the calculator.

,000 BTU furnace

In an hour of continuous usage, a 30,000 BTU RV furnace will use 1/3 gallon of propane. As a result, using a gallon of propane will take 3 hours.

Of course, the size of your propane tanks has an impact on how rapidly you utilize it.

Because this changes from rig to rig, you’ll have to figure it out for yourself.

We have two 20-pound propane tanks in our rig.

Using our RV furnace for 60 hours with a 30,000 BTU furnace will deplete one of our propane tanks.

One propane tank will be depleted in 5 days if we use our RV furnace for 12 hours every day.

The tank will be empty in 10 days if we use our furnace for 6 hours per day.

,000 BTU furnace

A smaller furnace will consume propane more slowly. This furnace will burn around 1/4 gallon of propane in an hour of continuous usage, according to the preceding equation. So, with a 20,000 BTU furnace, draining a gallon of propane will take closer to 4 hours.

,000 BTU furnace

Propane will be consumed more quickly with a larger unit. It will take two and a half hours to use a gallon of propane at a burn rate of 90,000-100,000 BTUs per hour.

How long can a 20-pound gas tank keep a heater running?

The amount of propane you’ll need for your particular application will be determined by factors including fluctuating outside temperatures, the size and setting of your heater, and whether or not your workstation is insulated or otherwise protected from the elements.

Outdoor spaces, such as a deck or patio, provide unique issues when it comes to heating. Patio and portable heaters function to raise the ambient temperature of a small area, rather than an enclosed place like a garage or workspace, because the location is open to the weather. On the maximum setting, most patio heaters emit around 40,000 BTUs per hour, which means a 20-pound propane tank will give upwards of 10 hours of heat.

How much gas does a propane heater use?

It would be wonderful if the sole consideration was for appearances, but it is much more than that. The amount of fuel you may expect to use is one of the most significant considerations.

I’ll answer the question of how much gas an outdoor heater uses today. There’s also some more helpful information.

Most portable propane patio heaters feature a 20-pound tank that holds roughly 4.7 gallons of propane, but they’re only filled to 80 percent capacityabout 16 poundsfor safety reasons. Refills for 20lb tanks can last up to 10 hours and cost $3.25 to $4 per gallon.

At 15000 BTU, how long will a 20 pound propane tank last?

A soft nose P.O.L. is included, as well as an adjustable regulator with three heat settings: 10,000, 12,500, and 15,000 BTUs. Mounts directly to a 20-pound propane tank and has a run time of up to 29 hours on high.

How long would a 100-pound gas tank keep you warm?

Your 100-pound bottle will fuel your propane fireplace for roughly 84 hours at a consumption rate of 26,000 BTU per hour, which is equivalent to 3.5 days of continuous 24/7 running.

How long would a propane tank of 250 gallons last?

Winter heating is mostly accomplished using 250-gallon propane tanks. You can heat the entire house with a 250-gallon household tank. The most important question here is:

A 250-gallon propane tank can last anywhere from 26 days to 7 months and 2 days depending on usage. That’s a really broad range. The utilization of a 250-gallon propane tank determines its longevity (how much propane per day you burn). This is related to the size of the house you want to heat with a 250-gallon propane tank in an indirect way.

You must evaluate how long a household propane tank will last if you intend to use it for heating. There are two methods for calculating this (we’ll use both later on), namely:

We must also consider that a full 250-gallon propane tank carries 200 gallons of propane. The 80 percent limit applies to all home tank sizes as a safety precaution.

Let’s start by looking at how to figure out how long a 250-gallon propane tank will last for heating purposes using heating demand. After that, we’ll see how long this tank will last for dwellings of 500, 1000, 1500, 2000, 2500, 3000, 3500, and 4000 square feet:

What is the average amount of propane used per hour by a furnace?

The way you utilize propane will have an impact on how long it lasts.

Consider the most popular propane applications:


As previously stated, 20-pound propane tanks are used for small chores such as cooking single meals. If you’re grilling on a medium-sized barbecue, one tank of propane will normally last between 18 and 20 hours. Larger barbecues, on the other hand, can consume 20 pounds of propane in as little as 10 hours.

If you use a medium-sized grill on high heat, you’ll need one or two pounds of fuel per meal on average. That works out to about 8 grilling sessions per tank.


The industry standard for measuring the heating efficiency of domestic equipment is the British Thermal Unit, or BTUs. One gallon of propane equals 92,000 BTUs, and the average house furnace uses 100,000 BTUs. The average house furnace consumes about one gallon of propane each hour.

Depending on how often you turn on your furnace, a house furnace might burn anywhere from 500 to 1,200 gallons of propane every year.

Hot Water Heaters

The amount of hot water you use depends on how many bathrooms you have and how many people are in and out of your home. The average residence uses approximately 1.5 gallons of propane per day for conventional hot water heating.

For hot water, the average homeowner will use between 200 and 300 gallons of propane each year.

The average homeowner will consume about 2.5, 500-gallon propane tanks for house heating and cooking each year.

How long can 96 gallons of propane keep you warm?

On your current propane fuel supply, multiply 96 gallons by 1.09 gallons per hour, and you’ll have 104.64 hours of heat and energy left.