[acnaresh@hotmail.com]

this may be of some use

Kind Regards

Arish Naresh J.P, MHSc(Distinction), PG HSM, PG HSc,Dent Therapy, Adv Cert IT PhD(Hon)
Order of New Zealand
President – International Oral Health Association
Former Chairperson – NZ Dental and Oral Health Therapists Association
Director – Naresh Professional Services
President – Tairawhiti Multicultural Council
https://www.linkedin.com/in/arishnaresh/

________________________________
From: ACIPC Infexion Connexion on behalf of Lalith Ramachandra
Sent: Friday, July 23, 2021 4:58 PM
To: ACIPCLIST@ACIPC.ORG.AU
Subject: Re: [ACIPC_Infexion_Connexion] Question

Hello Kathleen

According to US CDC, there is still no clear evidence that transmission of any covid variants is possible in sufficient numbers to infect people, through the ducting of central air conditioning systems.

They have previously recommended high ventilation rates (fresh air) of around 4 air changes per hour or greater, to dilute any aerosolised particles.

Most hotels dont use central ducted plant for the guest bedrooms. And very little fresh air into the split systems or fan coil units that serve them. What they need to do is keep the toilet exhaust operational all the time to keep the each room under a slight negative pressure.

From what I have read, the delta variant makes more copies of itself in a much quicker time within the infected persons. So may require higher ventilation rates than the variants before.

But, to answer your question, I dont think there is a clear answer and certainly not without knowing the type of a/c system and the ventilation rate etc.

Regards

Lalith Ramachandra
Mech Engineer
LR Consulting Engineers
Darwin, NT

Ph 0401117423

Sent from LR Consulting Engineers

On 23 Jul 2021, at 2:32 pm, Kathleen Felstead wrote:

HI All,

Can anyone give me any direction in regards to what to do with air-conditioning/ heating systems at a Residential Aged Care site in the event of a COVID outbreak.

Given that COVID has been spread at some of the medi hotels via air-conditioning systems and in particular the Delta strain.

Is the thought that the air-conditioning would be turned off in zones affected?

Your thoughts and guidance greatly appreciated.

Kind Regards

Kathleen

Kathleen Felstead
Clinical Quality & Education Consultant
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Corporate Services
70 Dale St Port Adelaide, SA 5015
M. 0436 619 720
E. kfelstead@unitingsa.com.au
W. unitingsa.com.au
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