HVAC 3

Question 0

A typical 2,000-square-foot (185.8 square meters) house might have a __________ ton air conditioning system

Answer 0

5-ton (60,000-Btu), implying that you might need perhaps 30 Btu per square foot. These are rough estimates.

Question 1

A typical window air conditioner might be rated at

Answer 1

10,000 Btu.

Question 2

The energy efficiency rating (EER) of an air conditioner is

Answer 2

its Btu rating over its wattage.

Question 3

As an example of EER, if a 10,000-Btu air conditioner consumes 1,200 watts, its EER is

Answer 3

8.3 (10,000 Btu/1,200 watts). Obviously, you would like the EER to be as high as possible, but normally a higher EER is accompanied by a higher price.

Question 4

Let’s say you have a choice between two 10,000-Btu units. One has an EER of 8.3 and consumes 1,200 watts, and the other has an EER of 10 and consumes 1,000 watts. Let’s also say that the price difference is $100. To determine the payback period on the more expensive unit, you need to know

Answer 4

approximately how many hours per year you will be operating the air conditioner and how much a kilowatt-hour (kWh) costs in your area.