ENERGY STAR certified heat pumps have higher ratings for seasonal energy efficiency ratio (SEER), energy efficiency ratio (EER), and heating seasonal performance factor (HSPF) and use about 5% percent less energy than conventional new models.
1 8 bits that contain the Type of Service, also referred to as Quality of Service (QoS), which describes what priority the packet should have, 2  16 bits that contain the length of the packet in bytes, 3  16 bits that contain an identification tag to help reconstruct the packet from several fragments, 4  3 bits.
Bits and Bytes. Each binary digit is called a bit. Use the table above to see how many bits it takes to represent 3,897. Go ahead, we'll wait. That's right, twelve bits. The right-most bit (the one bit) is the least significant bit and the left-most bit (the two-thousand forty-eight bit) is the most significant bit. Since it is easy to lose your place when reading a long string of 0's and 1's, binary numbers are often displayed in 4-bit groups, like this: 1111 0011 1001. Two of these 4-bit groups (eight bits altogether) make a byte, which is the basic unit for measuring the size of a digital memory or storage device. What can you store in one byte? Think about how many different numbers can be encoded with one byte. (It may help to make an analogy with decimal numbers first: how many different numbers can you encode with 2 digits? how many with 3 digits?)