Wait wait wait, where did this falllacy come from that hooded powered respirators are more expensive!?
If you take the example of single use disposable respirators, then costs are practically even, if not cheaper to use powered hoods. If you dont believe me lets do a quick albeit rough comparison:
1 employee uses 1 mask per day*
The cost of the disposable mask is £2.50**
The employee works and needs to use a mask for 5 days a week, 40 weeks a year
= cost of 1 years P3 dusk mask supply is £500 a year, or £2500 for 5 years.
The cost of a top of the range hooded, battery powered respirator ~£500***
Filters require replacing once a month at most, costing £25 a month or £300 a year
= £500 + £1500 or £2000 total cost for a 5 year period initial outlay and a LOT of replacement filters) replacing the unit every 5 years
*in reality this could be several masks per day, as masks get damaged or dirtied and discarded during break periods
** yes you could get cheaper masks, but for one which is able to pass a fit test, has a good construction and an exhalation valve you could be looking easily at a LOT! more.
*** £180 for batteries and charger, £220 for hood, £100 for tubing and initial filters
So when comparing a extremely cheap disposable, with a extremely good powered respirator, with very conservative margins built in, the powered hood comes in cheaper.
Additional factors to consider, but again these wil be paid off the more purchased and longer used:
Storage and cleaning of powered hoods
Use of electricity
Training of users - usually free from the supplier
But this can be offset by the benefits, not just financial:
Does not require costs for face fit testing
Does not interfere with other PPE eg. safety glasses / goggles
Provides a higher level of protection, 4x rather than 20x WEL
Whilst there may be some rare occasions for replacement parts from wear or damage, a 5 year use is very conservative.
I do not make or sell these systems, but I often recommend them where users regularly require to use disposable masks and have seen many sites implement them with great sucess, both on the costs as well as the uptake and feedback from the user (cooler, not sweaty, don't fog, easier to use/fit etc..)
I would be happy to write up a case study / real workplace example using photos from one of our actual workplaces if someone from SHP gets in touch.
Des
Though also to be considered, remember PPE is the last resort, if your spending £2500 a year per employee, 5-10 employees in the area, it wont take many years to recover the initial costs of an engineering an control system, containment or ventilation.