Char-Broil 45,000 Btu Gas Grill with an average price of $250.

In addition to the bunk system and the optional 20,000 BTU furnace, it also has the following additional features.

A good rule of thumb is to buy 28 to 40 BTU per square foot of space you want to cool.

So in a kitchen for example, you probably want to figure more towards 40 BTU per square foot.

To get the optimum benefit for your purchase, select the best BTU choice for the amount of square footage you need to cool.

BTU (British Thermal Units) serve as a way to calculate the amount of energy needed in order to raise room temperature by one degree.

The basic BTU guidelines are based on square footage, so if you don't know the size of your room, break out the measuring tape.

This 7,000 BTU unit comes with a remote control with six settings and an exhaust kit.

The BTU is designed to cool a small space of up to 160 square feet.

With a suggested retail price of about $600, this 13,000 BTU unit does it all.

Capable of cooling up to 400 square feet of space, the 12,000 BTU A120E model costs about $500.

This 13,000 BTU portable air conditioner uses water-to-air technology to cool the air without the use of a refrigerant.

This 12,000 BTU unit can cool up to 400 square feet of space, and it uses eco-friendly coolant.

The APC NetworkAIR AP7003 has an operating range of 61 to 86 degrees Fahrenheit and a cooling capacity of 7200 BTU.

With a cooling capacity of 12,966 BTU and an air flow of 600 CFM, this model has more versatility than the 7200 BTU model.

This is one of the APC portable air conditioners that has a cooling capacity of 7200 BTU.

This unit offers 12,966 BTU of power for any office.

Don't purchase a 12,966 BTU unit when a 7200 BTU unit will provide the cooling power you need.

The cooling output for this model measures 8,000 BTU.

The 18,000 BTU Maytag M6Y18F7C offers easy cooling for any apartment or home.

This 12,000 BTU model also has an energy-save function, 24-hour timer, full-featured remote control device, electronic controls and a lightweight construction that makes installation easy.

This Maytag portable air conditioner model has a 9,000 BTU cooling capacity and a slide-out filter for easy maintenance.

This 7,500 BTU portable air conditioner has a reusable filter and 195 CFM air flow for high-powered cooling at an affordable price.

The BTU designation is one of the most important considerations when selecting a portable A/C unit.

The higher the BTU, the more cooling capacity the air conditioner has.

As far as miraculous heating properties, Heat Surge claims the heater produces an "amazing" 5,119 BTU, when in reality; all 1500-watt space heaters generate that amount, regardless of the cost.

Danby has a wide range of portable air conditioner models to choose from, from cost-efficient 5,000 BTU units to high end 13,000 BTU units.