Simplify the following text for a Grade 15 native English-speaking person.
Original: In certain applications , such as air compression , multi-stage double-acting compressors are said to be the most efficient compressors available , and are typically larger , noisier , and more costly than comparable rotary units .
Simplified: In certain applications , such as air compression , multi-stage double-acting compressors are said to be the most efficient compressors available , and are typically larger , and more costly than comparable rotary units .