Table 3.

Maintenance suggestions for HVAC system

S. N.	HVAC system maintenance
1	Ensure proper labelling of parts of HVAC plant including the direction of airflow mentioning OA, SA, RA and EA.
2	Outside air intakes must be examined for any dust and moisture.
3	Drain pans and pipes checked for any accumulation of condensate water.
4	Clean condenser and evaporator coils.
5	Indoor air quality should be frequently checked usually every 6 months.
6	HEPA filter efficiency tests and efficiency rating label every 6 months.
7	Lubricate motors bearings, fans and moving parts.
8	Continuous monitoring of the humidity and temperature in ICU.

OA outdoor air, SA supply air, RA return air, EA exhaust air