Infection Prevention and Control/Air Disinfection - Revision history

Tobyvan: /* Installation */

2024-10-10T15:07:37Z

Installation

← Older revision		Revision as of 17:07, 10 October 2024
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	\|}		\|}

	In the typical application of 254 nm LPMV devices, occupant exposure shall not exceed and average of <math>0.10 \mu W\cdot cm^-2</math> for a period of time equivalent to 8 hours per day. The strategy for factoring equivalent acceptable exposure levels in the lower room in typical healthcare settings is represented in the table below.		In the typical application of 254 nm LPMV devices, occupant eye exposure shall not exceed and average of <math>0.10 \mu W\cdot cm^-2</math> for a period of time equivalent to 8 hours per day. The strategy for factoring equivalent acceptable exposure levels in the lower room in typical healthcare settings is represented in the table below.

	{\| class="wikitable"		{\| class="wikitable"

Tobyvan: /* Installation */ Eye exposure limits adjusted to comply with recommendation of Sliney 2013

2024-10-10T15:04:39Z

Installation: Eye exposure limits adjusted to comply with recommendation of Sliney 2013

← Older revision		Revision as of 17:04, 10 October 2024
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	\|}		\|}

	In the typical application of 254 nm LPMV devices, occupant exposure shall not exceed <math>40 \mu W\cdot cm^-2</math> for a period of time equivalent to 4 hours per day. The strategy for ~~determining~~ equivalent acceptable exposure levels in the lower room in typical healthcare settings is represented in the table below.		In the typical application of 254 nm LPMV devices, occupant exposure shall not exceed and average of <math>0.10 \mu W\cdot cm^-2</math> for a period of time equivalent to 8 hours per day. The strategy for factoring equivalent acceptable exposure levels in the lower room in typical healthcare settings is represented in the table below.

	{\| class="wikitable"		{\| class="wikitable"
	!ZONE!!EYE LEVEL<br>(m)!!ESTIMATED DAILY <br>EXPOSURE TIME <br>(h)!!IRRADIANCE LIMIT <br>(uW/cm²)		!ZONE!!EYE LEVEL<br>(m)!!ESTIMATED DAILY <br>EXPOSURE TIME <br>(h)!!IRRADIANCE LIMIT <br>(uW/cm²)
	\|-		\|-
	\|Corridors (no waiting)\|\|1.7\|\|1\|\|1.6		\|Corridors (no waiting)\|\|1.7\|\|1\|\|0.8
	\|-		\|-
	\|Indoor Waiting Areas\|\|1.7\|\|3\|\|0.5		\|Indoor Waiting Areas\|\|1.7
			1.2
			\|3\|\|0.3
	\|-		\|-
	\|ICU\|\|1.7<br>1.0\|\|4<br>6\|\|0.4<br>0.3		\|ICU\|\|1.7<br>1.0\|\|4<br>6\|\|0.2<br>0.15
	\|-		\|-
	\|Bedrooms/Offices\|\|1.7<br>1.2\|\|2<br>4\|\|0.8<br>0.4		\|Bedrooms/Offices\|\|1.7<br>1.2\|\|2<br>4\|\|0.4<br>0.2
	\|-		\|-
	\|Wards/Dormitories\|\|1.7<br>1.2\|\|2<br>4\|\|0.8<br>0.4		\|Wards/Dormitories\|\|1.7<br>1.2\|\|2<br>4\|\|0.4<br>0.2
	\|-		\|-
	\|Isolation Rooms\|\|1.7<br>1.2\|\|2<br>4\|\|0.8<br>0.4		\|Isolation Rooms\|\|1.7<br>1.2\|\|2<br>4\|\|0.4<br>0.2
	\|-		\|-
	\|Consultation Rooms\|\|1.7\|\|2\|\|0.8		\|Consultation Rooms\|\|1.7\|\|2\|\|0.4
	\|-		\|-
	\|Bronchoscopy rooms\|\|1.7\|\|2\|\|0.8		\|Bronchoscopy rooms\|\|1.7\|\|2\|\|0.4
	\|-		\|-
	\|Autopsy Rooms\|\|1.7\|\|2\|\|0.8		\|Autopsy Rooms\|\|1.7\|\|2\|\|0.4
	\|-		\|-
	\|Dining Halls\|\|1.7\|\|2\|\|0.8		\|Dining Halls\|\|1.7\|\|2\|\|0.4
	\|-		\|-
	\|Dormitories\|\|2.1\|\|8\|\|0.2		\|Dormitories\|\|2.1\|\|8\|\|0.1
	\|-		\|-
	\|Other areas\|\|1.7\|\|4\|\|0.4		\|Other areas\|\|1.7\|\|4\|\|0.2
	\|-		\|-
	\|}		\|}

Tobyvan at 06:18, 21 July 2020

2020-07-21T06:18:59Z

← Older revision		Revision as of 08:18, 21 July 2020
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	~~{{Expand}}~~

	==Implementation of Upper Room UVGI==		==Implementation of Upper Room UVGI==
	===Introduction and context===		===Introduction and context===

Tobyvan at 06:17, 21 July 2020

2020-07-21T06:17:36Z

← Older revision		Revision as of 08:17, 21 July 2020
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	*Total maintained UVGI radiant flux <math display="inline">\bigl(\Phi_T , mW \bigr)</math> of selected devices, measured in accordance with SATS 1706:2016 as amended and the UVGI measurement and instrumentation and calibration plan		*Total maintained UVGI radiant flux <math display="inline">\bigl(\Phi_T , mW \bigr)</math> of selected devices, measured in accordance with SATS 1706:2016 as amended and the UVGI measurement and instrumentation and calibration plan
	*The selected device’s minimum equivalent clean air delivery rate <math display="inline">\bigl(CARD_e , L/s \bigr)</math>.		*The selected device’s minimum equivalent clean air delivery rate <math display="inline">\bigl(CARD_e , L/s \bigr)</math>.
	*Room volume <math display="inline">\bigl(V_r , m^3 \bigr)</math>, occupancy profile <math display="inline">\bigl(N_p , number of persons \bigr)</math> and effective mechanical ventilation rate (Qv, l/s) of considered room.		*Room volume <math display="inline">\bigl(V_r , m^3 \bigr)</math>, occupancy profile <math display="inline">\bigl(N_p , number of persons \bigr)</math> and effective mechanical ventilation rate (Qv, l/s) of considered room.

	<br>		<br>
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	[[Category: Decontamination]]		[[Category: Decontamination]]
	[[Category:Crosscutting Issues]]		[[Category:Crosscutting Issues]]
			[[Category:UVGI]]

Tobyvan: /* Acceptance criteria */

2020-06-25T10:18:37Z

Acceptance criteria

Tobyvan: /* Prescriptive design process */

2020-06-25T10:17:25Z

Prescriptive design process

← Older revision		Revision as of 12:17, 25 June 2020
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	*Total maintained UVGI radiant flux <math display="inline">\bigl(\Phi_T , mW \bigr)</math> of selected devices, measured in accordance with SATS 1706:2016 as amended and the UVGI measurement and instrumentation and calibration plan		*Total maintained UVGI radiant flux <math display="inline">\bigl(\Phi_T , mW \bigr)</math> of selected devices, measured in accordance with SATS 1706:2016 as amended and the UVGI measurement and instrumentation and calibration plan
	*The selected device’s minimum equivalent clean air delivery rate <math display="inline">\bigl(CARD_e , L/s \bigr)</math>.		*The selected device’s minimum equivalent clean air delivery rate <math display="inline">\bigl(CARD_e , L/s \bigr)</math>.
	*Room volume <math display="inline">\bigl(V_r , m^3 \bigr)</math>, occupancy profile <math display="inline">\bigl(\N_p , number of persons \bigr)</math> and effective mechanical ventilation rate (Qv, l/s) of considered room. <br>		*Room volume <math display="inline">\bigl(V_r , m^3 \bigr)</math>, occupancy profile <math display="inline">\bigl(N_p , number of persons \bigr)</math> and effective mechanical ventilation rate (Qv, l/s) of considered room. <br>

	#<math>Number of devices_\phi=\frac{14\times V_r}{\phi_T}</math>		#<math>Number of devices_\phi=\frac{14\times V_r}{\phi_T}</math>

Tobyvan: /* Prescriptive design process */

2020-06-25T10:15:34Z

Prescriptive design process

← Older revision		Revision as of 12:15, 25 June 2020
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	*Total maintained UVGI radiant flux <math display="inline">\bigl(\Phi_T , mW \bigr)</math> of selected devices, measured in accordance with SATS 1706:2016 as amended and the UVGI measurement and instrumentation and calibration plan		*Total maintained UVGI radiant flux <math display="inline">\bigl(\Phi_T , mW \bigr)</math> of selected devices, measured in accordance with SATS 1706:2016 as amended and the UVGI measurement and instrumentation and calibration plan
	*The selected device’s minimum equivalent clean air delivery rate <math display="inline">\bigl(CARD_e , L/s \bigr)</math>.		*The selected device’s minimum equivalent clean air delivery rate <math display="inline">\bigl(CARD_e , L/s \bigr)</math>.
	*Room volume <math display="inline">\bigl(V_r , m^3 \bigr)</math>, occupancy profile <math display="inline">\bigl(N_p , number of persons \bigr)</math> and effective mechanical ventilation rate (Qv, l/s) of considered room. <br>		*Room volume <math display="inline">\bigl(V_r , m^3 \bigr)</math>, occupancy profile <math display="inline">\bigl(\N_p , number of persons \bigr)</math> and effective mechanical ventilation rate (Qv, l/s) of considered room. <br>

	#<math>Number of devices_\phi=\frac{14\times V_r}{\phi_T}</math>		#<math>Number of devices_\phi=\frac{14\times V_r}{\phi_T}</math>

Tobyvan: /* Prescriptive design process */

2020-06-25T10:12:20Z

Prescriptive design process

← Older revision		Revision as of 12:12, 25 June 2020
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	*Total maintained UVGI radiant flux <math display="inline">\bigl(\Phi_T , mW \bigr)</math> of selected devices, measured in accordance with SATS 1706:2016 as amended and the UVGI measurement and instrumentation and calibration plan		*Total maintained UVGI radiant flux <math display="inline">\bigl(\Phi_T , mW \bigr)</math> of selected devices, measured in accordance with SATS 1706:2016 as amended and the UVGI measurement and instrumentation and calibration plan
	*The selected device’s minimum equivalent clean air delivery rate <math display="inline">\bigl(\CARD_e , L/s \bigr)</math>.		*The selected device’s minimum equivalent clean air delivery rate <math display="inline">\bigl(CARD_e , L/s \bigr)</math>.
	*Room volume <math display="inline">\bigl(V_r , m^3 \bigr)</math>, occupancy profile <math display="inline">\bigl(\N_p , number of persons \bigr)</math> and effective mechanical ventilation rate (Qv, l/s) of considered room. <br>		*Room volume <math display="inline">\bigl(V_r , m^3 \bigr)</math>, occupancy profile <math display="inline">\bigl(N_p , number of persons \bigr)</math> and effective mechanical ventilation rate (Qv, l/s) of considered room. <br>

	#<math>Number of devices_\phi=\frac{14\times V_r}{\phi_T}</math>		#<math>Number of devices_\phi=\frac{14\times V_r}{\phi_T}</math>

Tobyvan: /* Prescriptive design process */

2020-06-25T10:11:37Z

Prescriptive design process

← Older revision		Revision as of 12:11, 25 June 2020
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	The following set of device and application data is required:<br>		The following set of device and application data is required:<br>

	*Total maintained UVGI radiant flux ~~(ФT, mW)~~ <math display="inline">\bigl(\Phi_T , mW \bigr)</math>of selected devices, measured in accordance with SATS 1706:2016 as amended and the UVGI measurement and instrumentation and calibration plan		*Total maintained UVGI radiant flux <math display="inline">\bigl(\Phi_T , mW \bigr)</math> of selected devices, measured in accordance with SATS 1706:2016 as amended and the UVGI measurement and instrumentation and calibration plan
	*The selected device’s minimum equivalent clean air delivery rate (~~CADRe~~, l/s).		*The selected device’s minimum equivalent clean air delivery rate <math display="inline">\bigl(\CARD_e , L/s \bigr)</math>.
	*Room volume (Vr, m³), occupancy profile (Np, number of persons) and effective mechanical ventilation rate (Qv, l/s) of considered room. <br>		*Room volume <math display="inline">\bigl(V_r , m^3 \bigr)</math>, occupancy profile <math display="inline">\bigl(\N_p , number of persons \bigr)</math> and effective mechanical ventilation rate (Qv, l/s) of considered room. <br>

	#<math>Number of devices_\phi=\frac{14\times V_r}{\phi_T}</math>		#<math>Number of devices_\phi=\frac{14\times V_r}{\phi_T}</math>

Tobyvan: /* Prescriptive design process */

2020-06-25T10:09:18Z

Prescriptive design process

← Older revision		Revision as of 12:09, 25 June 2020
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	The following set of device and application data is required:<br>		The following set of device and application data is required:<br>

	*Total maintained UVGI radiant flux (ФT, mW) of selected devices, measured in accordance with SATS 1706:2016 as amended and the UVGI measurement and instrumentation and calibration plan		*Total maintained UVGI radiant flux (ФT, mW) <math display="inline">\bigl(\Phi_T , mW \bigr)</math>of selected devices, measured in accordance with SATS 1706:2016 as amended and the UVGI measurement and instrumentation and calibration plan
	*The selected device’s minimum equivalent clean air delivery rate (CADRe, l/s).		*The selected device’s minimum equivalent clean air delivery rate (CADRe, l/s).
	*Room volume (Vr, m³), occupancy profile (Np, number of persons) and effective mechanical ventilation rate (Qv, l/s) of considered room. <br>		*Room volume (Vr, m³), occupancy profile (Np, number of persons) and effective mechanical ventilation rate (Qv, l/s) of considered room. <br>

← Older revision		Revision as of 12:18, 25 June 2020
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	*Total maintained UVGI radiant flux <math display="inline">\bigl(\Phi_T , mW \bigr)</math> of selected devices, measured in accordance with SATS 1706:2016 as amended and the UVGI measurement and instrumentation and calibration plan		*Total maintained UVGI radiant flux <math display="inline">\bigl(\Phi_T , mW \bigr)</math> of selected devices, measured in accordance with SATS 1706:2016 as amended and the UVGI measurement and instrumentation and calibration plan
	*The selected device’s minimum equivalent clean air delivery rate <math display="inline">\bigl(CARD_e , L/s \bigr)</math>.		*The selected device’s minimum equivalent clean air delivery rate <math display="inline">\bigl(CARD_e , L/s \bigr)</math>.
	*Room volume <math display="inline">\bigl(V_r , m^3 \bigr)</math>, occupancy profile <math display="inline">\bigl(N_p , number of persons \bigr)</math> and effective mechanical ventilation rate (Qv, l/s) of considered room. <br>		*Room volume <math display="inline">\bigl(V_r , m^3 \bigr)</math>, occupancy profile <math display="inline">\bigl(N_p , number of persons \bigr)</math> and effective mechanical ventilation rate (Qv, l/s) of considered room.

			<br>

	#<math>Number of devices_\phi=\frac{14\times V_r}{\phi_T}</math>		#<math>Number of devices_\phi=\frac{14\times V_r}{\phi_T}</math>
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	*A UVGI equivalent ventilation rate of the product of 80 l/s per person and the typical peak number of room occupants. This CADRe rate determines the total required UV-c output.		*A UVGI equivalent ventilation rate of the product of 80 l/s per person and the typical peak number of room occupants. This CADRe rate determines the total required UV-c output.

	Any shortfall between the required and the actual ventilation rate or MRU should be corrected for increasing by the number of UVGI devices installed, as determined using the formulae in section [[#PrescriptiveDesign-UVGI\|§ Prescriptive Design Process]]. The number of devices required should not be less than the minimum number determined, or exceed this value by more than 1. Alternatively, for rooms with unknown occupancy levels, the CADRe resulting from the number of devices determined by the prescribed MRU could be used to define the safe occupancy limit for that room		Any shortfall between the required and the actual ventilation rate or MRU should be corrected for increasing by the number of UVGI devices installed, as determined using the formulae in section [[#PrescriptiveDesign-UVGI\|§ Prescriptive Design Process]]. The number of devices required should not be less than the minimum number determined, or exceed this value by more than 1.

			Alternatively, for rooms with unknown occupancy levels, the CADRe resulting from the number of devices determined by the prescribed MRU could be used to define the safe occupancy limit for that room
	The UV dose should inactivate airborne infectious agents by at least 90% (D90) or a percentage equivalent of the ventilation rate of 80 l/s/per person as recommended by the WHO.		The UV dose should inactivate airborne infectious agents by at least 90% (D90) or a percentage equivalent of the ventilation rate of 80 l/s/per person as recommended by the WHO.

			<br />

	[[File:Upper Room UVGI Decision Tree.png\|none\|thumb\|Design Decision Tree for Upper Room UVGI]]		[[File:Upper Room UVGI Decision Tree.png\|none\|thumb\|Design Decision Tree for Upper Room UVGI]]
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	The system start-up should commence after the installation process is complete. Prior to start-up and the initial verification testing, lamps must be cleaned and seasoned according to the manufacturer’s instructions.		The system start-up should commence after the installation process is complete. Prior to start-up and the initial verification testing, lamps must be cleaned and seasoned according to the manufacturer’s instructions.
	Device performance should be verified independently, by switching all devices off then measuring each device’s output individually. The output must concur with the initial specification stipulated in the procurement bid.		Device performance should be verified independently, by switching all devices off then measuring each device’s output individually. The output must concur with the initial specification stipulated in the procurement bid.
	The 1m and 2m maximum irradiance (measured at 1m and 2m from the external front face of the device) for each device must comply with the manufacturer’s declared performance values. Using declared lifetime low performance values, each new or refurbished device will be independently accepted for service when it is proven to exceed the declared minimum or depreciated performance values by at least 43% (100/70).		The 1m and 2m maximum irradiance (measured at 1m and 2m from the external front face of the device) for each device must comply with the manufacturer’s declared performance values. Using declared lifetime low performance values, each new or refurbished device will be independently accepted for service when it is proven to exceed the declared minimum or depreciated performance values by at least 43% (100/70).

	<u>Example:</u>		<u>Example:</u>