air

conditioner

dust

maintenance

conditioning

brush

filter

condition

clean

dirty

home

man

wall

dirt

house

equipment

work

service

people

office

change

breathing

repair

cold

background

breath

dusty

remove

quality

person

human

maid

copd

trap

removes

cough

disease

cooling

purpose

unhealthy

lung

illness

replace

health

technology

apartment

coil

infection

captures

string