In summer, it is necessary to supply _______ air inside the room before it enters the room.

In Winter, the outside air is cool and hence, the process of air conditioning involves filtering, preheating and _______…

The width of the seats in an auditorium should be between ______

Where people are working, there has to be __________ to cause proper ventilation of the premises.

The formation of _______ takes place when the reflecting surfaces are situated at a distance greater than 17 M or so.

A _____________ produced by sound may shatter windows and can cause damage to the Plaster of walls.

Combination system consist of supply system and ______ system.

Felt and mineral wool are examples of _______