GhettoBlast - Revision history

Juerd at 04:51, 20 January 2024

2024-01-20T04:51:53Z

← Older revision		Revision as of 04:51, 20 January 2024
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	{{Project		{{Project
	\|Name=GhettoBlast		\|Name=GhettoBlast
	\|Picture=		\|Picture=GhettoBlast1.JPG
	\|Omschrijving=DIY air purifier based on HEPA filter from Smart Air Blast.		\|Omschrijving=DIY air purifier based on HEPA filter from Smart Air Blast.
	\|Status=In progress		\|Status=In progress
Line 12:		Line 12:
	File:P1050898.jpg\|CADR test setup (door closed of course), front panels still taped		File:P1050898.jpg\|CADR test setup (door closed of course), front panels still taped
	File:P1050899.jpg\|CADR test setup: aerosol generator and the blobs it makes :)		File:P1050899.jpg\|CADR test setup: aerosol generator and the blobs it makes :)
			File:GhettoBlast1.JPG\|Front
			File:GhettoBlast2.JPG\|Back
	</gallery>		</gallery>

Juerd: /* Comparison table */

2024-01-19T18:22:07Z

Comparison table

← Older revision		Revision as of 18:22, 19 January 2024
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	! CADR per W		! CADR per W
	\| 6.79 m³/h \|\| 28.67 m³/h \|\| +322%		\| 6.79 m³/h \|\| 28.67 m³/h \|\| +322%
			\|-
			! Noise at 1 m
			\| 50 dB(A) \|\| 45 dB(A) \|\| -68% (acoustic)<br>-30% (perceived)
	\|-		\|-
	! Weight		! Weight

Juerd: /* Why */

2024-01-18T00:43:28Z

Why

← Older revision		Revision as of 00:43, 18 January 2024
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	== Why ==		== Why ==

	We have two big air purifiers at RevSpace: one for the main space, one for the kitchen. Both are the Blast Mk II from Smart Air, which was the ideal device (at least when we bought these in 2022), in terms of CADR, noise, and CADR/€. And maybe even more importantly: you can switch them on/off with a simple external relay, in our case a Zigbee socket switch, so we can automatically turn them off when the space is closed. Most air purifiers require pressing one or more buttons after a power outage.		We have two big air purifiers at RevSpace: one for the main space, one for the kitchen. Both are the Blast Mk II from Smart Air, which was the ideal device (at least when we bought these in 2022), in terms of CADR, noise, and CADR/€. And maybe even more importantly: you can switch them on/off with a simple external relay, in our case a Zigbee socket switch, so we can automatically turn them off when the space is closed, and on when the space opens again. Most air purifiers require pressing one or more buttons after a power outage.

	Unfortunately, our lounge has negligible ventilation and no air purifier. That means opening a window to curb the spread of respiratory disease. Open windows are nice in summer, but way too cold when it's freezing outside.		Unfortunately, our lounge has negligible ventilation and no air purifier. That means opening a window to curb the spread of respiratory disease. Open windows are nice in summer, but way too cold when it's freezing outside.

Juerd: /* What */ duurde wat langer dan gepland...

2024-01-18T00:42:25Z

What: duurde wat langer dan gepland...

← Older revision		Revision as of 00:42, 18 January 2024
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	== What ==		== What ==

	An air purifier is [https://smartairfilters.com/en/blog/how-to-make-diy-air-purifier/ just a filter and a fan] and making one is a nice 10 minute DIY project. Or 10 hours, depending on how you decide to design it.		An air purifier is [https://smartairfilters.com/en/blog/how-to-make-diy-air-purifier/ just a filter and a fan] and making one is a nice 10 minute DIY project. Or 20 hours, depending on how you decide to design it.

	GhettoBlast is not a sound system, it's an air purifier! Basically, a wooden box to house a (used) Blast HEPA filter and some PC fans. It uses PC fans because they're silent, efficient, and easy to buy. Unlike the real Blast, GhettoBlast has the fans on the clean side of the HEPA filter. That will likely result in a [https://smartairfilters.com/en/blog/air-purifier-filter-on-the-front-or-back/ lower CADR], but also more durably clean fans and internal wiring.		GhettoBlast is not a sound system, it's an air purifier! Basically, a wooden box to house a (used) Blast HEPA filter and some PC fans. It uses PC fans because they're silent, efficient, and easy to buy. Unlike the real Blast, GhettoBlast has the fans on the clean side of the HEPA filter. That will likely result in a [https://smartairfilters.com/en/blog/air-purifier-filter-on-the-front-or-back/ lower CADR], but also more durably clean fans and internal wiring.

Juerd: /* Comparison table */

2024-01-17T23:02:09Z

Comparison table

← Older revision		Revision as of 23:02, 17 January 2024
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	\|-		\|-
	! Dimensions		! Dimensions
	\| 57.3 × 33 × 123 cm \|\| 60 × 15.3 × 120 cm \|\| -52% (volume)		\| 57.3 × 33 × 123 cm \|\| 60 × 16.8 × 120 cm \|\| -48% (volume)
	\|-		\|-
	! Aesthetics		! Aesthetics

Juerd: /* Comparison table */

2024-01-17T22:55:24Z

Comparison table

← Older revision		Revision as of 22:55, 17 January 2024
Line 167:		Line 167:
	! Dimensions		! Dimensions
	\| 57.3 × 33 × 123 cm \|\| 60 × 15.3 × 120 cm \|\| -52% (volume)		\| 57.3 × 33 × 123 cm \|\| 60 × 15.3 × 120 cm \|\| -52% (volume)
			\|-
			! Aesthetics
			\| nice \|\| ugly \|\| yes
	\|-		\|-
	! Assembly time		! Assembly time
	\| none \|\| ~20 hours \|\| +Inf		\| none \|\| ~20 hours \|\| +Inf
	\|}		\|}

Juerd: /* Comparison table */

2024-01-17T22:54:16Z

Comparison table

← Older revision		Revision as of 22:54, 17 January 2024
Line 164:		Line 164:
	! Weight		! Weight
	\| 30 kg \|\| 15 kg \|\| -50%		\| 30 kg \|\| 15 kg \|\| -50%
			\|-
			! Dimensions
			\| 57.3 × 33 × 123 cm \|\| 60 × 15.3 × 120 cm \|\| -52% (volume)
	\|-		\|-
	! Assembly time		! Assembly time
	\| none \|\| ~20 hours \|\| +Inf		\| none \|\| ~20 hours \|\| +Inf
	\|-
	~~! Dimensions~~
	~~\| 57.3 × 33 × 123 cm \|\| 60 × 15.3 × 120 cm \|\| -52% (volume)~~
	\|}		\|}

Juerd: /* Comparison table */

2024-01-17T22:54:01Z

Comparison table

← Older revision		Revision as of 22:54, 17 January 2024
Line 167:		Line 167:
	! Assembly time		! Assembly time
	\| none \|\| ~20 hours \|\| +Inf		\| none \|\| ~20 hours \|\| +Inf
			\|-
			! Dimensions
			\| 57.3 × 33 × 123 cm \|\| 60 × 15.3 × 120 cm \|\| -52% (volume)
	\|}		\|}

Juerd: /* Why */

2024-01-17T11:34:07Z

Why

← Older revision		Revision as of 11:34, 17 January 2024
Line 16:		Line 16:
	== Why ==		== Why ==

	We have two big air purifiers at RevSpace: one for the main space, one for the kitchen. Both are the Blast Mk II from Smart Air, which was the ideal device (at ~~lesat~~ when we bought these in 2022), in terms of CADR, noise, and CADR/€. And maybe even more importantly: you can switch them on/off with a simple external relay, in our case a Zigbee socket switch, so we can automatically turn them off when the space is closed. Most air purifiers require pressing one or more buttons after a power outage.		We have two big air purifiers at RevSpace: one for the main space, one for the kitchen. Both are the Blast Mk II from Smart Air, which was the ideal device (at least when we bought these in 2022), in terms of CADR, noise, and CADR/€. And maybe even more importantly: you can switch them on/off with a simple external relay, in our case a Zigbee socket switch, so we can automatically turn them off when the space is closed. Most air purifiers require pressing one or more buttons after a power outage.

	Unfortunately, our lounge has negligible ventilation and no air purifier. That means opening a window to curb the spread of respiratory disease. Open windows are nice in summer, but way too cold when it's freezing outside.		Unfortunately, our lounge has negligible ventilation and no air purifier. That means opening a window to curb the spread of respiratory disease. Open windows are nice in summer, but way too cold when it's freezing outside.

Juerd: /* Build log */

2024-01-17T02:43:44Z

Build log

← Older revision		Revision as of 02:43, 17 January 2024
Line 56:		Line 56:
	* 2024-01-12/13: lasercut front plates, attached fans, tested, measured CADR		* 2024-01-12/13: lasercut front plates, attached fans, tested, measured CADR
	* 2024-01-13/14: added fan gaskets and grills, glued front plates		* 2024-01-13/14: added fan gaskets and grills, glued front plates
			* 2024-01-16: final wiring and assembly (for now at least)

	To do:		To do:

	* Wait for glue to cure
	* Find a location and a method to mount to wall or ceiling.		* Find a location and a method to mount to wall or ceiling.
	* Make/buy a fan controller with RPM warning to alert if a fan fails. MQTT?		* Make/buy a fan controller with RPM warning to alert if a fan fails. MQTT?