McArdles Cleaning and Restoration has added COVID-19 cleans to its services.

Managing director Luke McArdle said they had already done two jobs in the Central West.

He said they had cleaned the residence of a man in Bathurst who had contracted the coronavirus and had also cleaned a commercial premises in Dubbo for the virus.

"We have had a couple of positive cases that have come to us and requested a general cleaning," he said.

"It's not as bad as some [other jobs]. It's a novel virus. You don't know what is potentially down the track."

Mr McArdle said COVID-19 cleaning was different to other tasks.

"It's tricky. We're following the Australian cleaning and disinfection principles," he said.

He said key touchpoints such as door handles, power points and switches all needed to be cleaned.

Mr McArdle said staff needed to wear full protective equipment including helmets and gloves for coronavirus cleaning jobs.

Mr McArdle said he had not received any COVID-19 cleaning jobs covering rental accommodation but said it was possible estate agents would need those intensive cleans when new tenants wanted to move in.

"I dare say we probaby will," he said.

Studies have determined the coronavirus remains on different surfaces for varying times.

The New England Journal of Medicine from the US completed a study in March testing various surfaces.

"[It] was more stable on plastic and stainless steel than on copper and cardboard, and viable virus was detected up to 72 hours after application to these surfaces," the study found.

It found the virus existed for three hours in aerosols, up to four hours on copper, up to 24 hours on cardboard and up to three days on plastic and stainless steel.

A NSW Health public notice said according to the World Health Organisation, it was not clear how long the virus survived on sufaces.

"Studies suggest that coronaviruses (including preliminary information on the COVID-19 virus) may persist on surfaces for a few hours or up to several days," it said.

"This may vary under different conditions such as the type of surface, temperature or humidity of the environment."