It is a compact and highly sterilized setup containing particular air filters to control the airflow system within. Some specific types of air conditioning and air handling units are used to maximize protection against contaminants to increase the physical safety of patients. The walls and ceilings are made of pre-engineered panels and the floors are chemical resistant and antistatic making the operation theatre easier to install and clean.
Features of a Modular OT?

A continuous flow of highly filtered “Bacteria free” air into the operation theatre.
A continuous removal of contaminated air out of the operation theatre
Durable anti-bacterial paint
Easy to clean and maintain
Permeability of vapor to escape which protects against the growth of yeast and microbes
Moisture and Thaw resistance
Easy to move and get hands on the instruments
Should be able to accommodate a number of doctors inside.