Anyone use these? got one you like?
Got a ghetto low cost version?
Set off smoke detectors?
Alternatives? are there sniffers which will find the vent leak w/o smoking the system? I've got 5 trips and a $1200 bill in finding two open vents in a hotel; they would not let me call the folks I use to smoke it as they were concerned (and justifiably so imho) about setting off the smoke alarms and sprinklers and/or smoking out the building.