Choosing the best filter type for your applications, please use the following chart:

Filters 10 and 20 are  suitable for most organic vapours and acid applications. However to maximise the efficiency of your system we recommend:	Type of vapours handled		Filter Type - Chemical Filter without particulates	Filter Type - Combination For chemicals with particulates present (Particulate or HEPA see manufacturers types) See notes below also.
Filter type 10 where organic vapours predominate	ORGANIC VAPOURS secondary acids		Filter 10	Filter 10 HP
Filter type 20 for handlings where acid vapours predominate	ACID VAPOURS secondary organic vapours		Filter 20	Filter 20 HP
Filter type 30 is used when formaldehyde predominates	FORMALDEHYDE		Filter 30	Filter 30 HP
Filter type 40 is used when ammonia predominates	AMMONIA		Filter 40	Filter 40 HP
Filter type 50 is used for general purposes	MULTIPURPOSE		Filter 50	Filter 50 HP

NOTES:
1. Do you require a filter for particulates? If so, this will be selected during the the buying process for cabinets supplied by Bigneat and Erlab - this is because the 'particulate' or 'HEPA' filter is supplied in 'combination'.

2. Carbon Filters Direct is currently unable to provide particulate filters for other manufacturers of cabinets without more detailed specifications from you about your cabinet and sizes of the HEPA filter you currently have installed. Pleased note that  CFD would be pleased to advise you of a HEPA filter to suit your application and we welcome you getting in touch with us.