for commercial or home to purify air: 
deal for office buildings, hospitals, schools, nursing homes, childcare facilities ,casinos, food processing facilities, manufacturing plants ,and remediation of odors from waste water treatment facilities, etc. 

for larger central conditioner systems or industrial deodorization: 
Ideal for Suitable for seafood and meat processing plant food, slaughtering plant, livestock farm, zoo and other places; can also be used for leather factory, shoe factory, furniture, glass and other 
chemical smell factory; more often used in feed processing plants, 
tobacco production and processing, garbage, etc. 

Please look at below dimension about plasma tube: