# FAQ: How Big Of A Space Heater Do I Need?

## How do I calculate what size heater I need?

To calculate the size unit heater required for your space, use the following formula: Calculate the cubic footage of the space to be heated by multiplying building length x width x ceiling height. A 30 x 40 pole barn with 14 foot average ceilings* will have (30x40x14=) 16,800 cubic feet of space to heat.

## Is a 1500 watt heater good?

The actual performance of a 1,500 watt heater varies according to the characteristics of the room. The heater won’t perform as well in a north-facing room with little or no insulation and drafty windows that let in cold air. It won’t heat a large open room very well at all.

## What size room will a 5000 BTU heater heat?

“5000 BTU air conditioner can cool a 100 to 150 sq ft room.” Energy Star guidelines for 5000 BTU AC room sizing also recommends that you: Increase capacity for a room with high sun exposure; +10% cooling output.

## How many watts do I need to heat a room?

TWO USEFUL FORMULAS Wattage: Multiply the area in feet by 10. For a room 20 feet by 20 feet, we obtain 400 sq. ft., multiplied by 10 to give 4000 watts. The number of watts = area x 10.

## What is the difference between 2kW and 3kW heater?

The 2kW and 3kW under-sink models have capacities of 10 and 15 litres, while the 3kW over-sink units are available with capacities of 10, 15 and 30 litres. (Note: These capacities refer to the volume of cold water each unit holds; the volume of hot water delivered may be slightly less.)

## What size room will a 1500W space heater heat?

As a rule of thumb, you’ll need roughly 10 watts of heating power for every square foot of floor area in the room. This means that a 1,500-watt heater can be the primary heat source for an area measuring up to 150 square feet.

## How big a room will a 2kW heater heat?

For ease of calculation let’s call it 20m². This means that if it is a living area you will need 2kw to heat it. If it is a bedroom; 1.5kw will probably be sufficient.

## How much does it cost to run a 1500 watt heater for 24 hours?

A common wattage for space heaters is 1,500 watts. Apply the formula 1,500 x 24 ÷ 1,000 x \$0.20 to determine the cost to run the space heater for a day. (Dividing by 1,000 changes watt hours to kilowatt hours.) In this case, it will cost \$7.20 if it was running for 24 hours straight.

## Is infrared or ceramic heater better?

Infrared heaters can be hotter to touch, but better for your overall health than ceramic heaters. And, lastly, ceramic heaters come out on top when it comes to heating up larger spaces, while infrared heaters are more efficient at heating small or localized living areas.

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## What space heater uses the least electricity?

We’ve got a full article on the safety of infrared heaters, and how they work. AND they typically have the lowest wattages for any space heater. Because of all this, infrared heaters can save you up to 60% on your heating bills!

## Is 5000 BTU enough for a bedroom?

A 5000 BTU air conditioner is suitable for cooling a room that’s 100-150 sq. If placed in a bigger room, it will result in energy inefficiency because the AC will run for longer to cool the room. On the upper scale, a 12,000 BTU AC is good for a 450-550 sq. ft room.