Hvac Systems

noun a length of something wound or arranged in a spiral or sequence

verb to wind or arrange something in a spiral or sequence

• The copper wire was wound into a tight coil for the electrical circuit.
• I found a coil of rope in the garage that we can use for the camping trip.
• He's got a cool tattoo of a snake coil on his arm.
• The tension in the room seemed to coil and twist like a snake ready to strike.

noun a material or substance that is used to prevent heat, sound, or electricity from passing through

• The insulation in the walls helps regulate the temperature inside the building.
• Make sure to add some extra insulation in the attic to keep the house warm.
• I heard that putting in good insulation can save you a ton on your energy bills.
• Emotional insulation can protect you from getting hurt by others.