Man, oh man. You may be opening up a huge can of worms.
First of all, what kindof gensets? huge diesel powered ones, or natural gas, propane, gas powered?
I was involved in a job doing this kindof stuff. These were big diesel generators. They were backups for power outages to power lift pumps for water towers, I think. I didn't really get into all that stuff. Tell us more about what they are and what they're for.
You'd be suprized but you may be messing with something that would be against the law to modify. The gensets I worked on had to be updated to new emission standards. The exhaust had to get up to temp very quick, and they had to be updated with load generating devices because sometimes on startup the load was too low to get the engine up to temp fast enough, and the emissions reduction stuff wouldn't work at low temps and could clog, or just pollute more than the laws allowed.
Here's a potential work around, if the emissions are regulated by laws. Make your own little device to monitor the air filters. Since this will not interfere with any emission regulation, it should be perfectly legal. How do the gensets do this? vaccuum sensor?
Perhaps add one of those dust vortex style filters they put on off road vehicles. What is getting the filters dirty? if you add something, you are technically not modifying the emissions systems already there.