LX-140 WITH 14,000 BTU AC AND 14,200 BTU HEATER. Yes I know its pricey at $419.89 but when you think what even a portable air-con is going to cost you, this all in one heater / air conditioner / fan and dehumidifier will cover all year round climate control for your grow room. One thing that really makes it stand out is its big capacity dehumidifier (60 pints).
The person should pass out in 6 - 20 seconds. Depending on the person, irreversable brain damage will begin somewhere around 4 to 6 minutes. At 7 minutes, the brain will be dead but the drowning person missed it all as they passed out at 6 - 20 seconds.
Less than two hours no decompression diving in the last 48 hours-wait 12 hours.2. Multi-day unlimited diving (no decompression) - wait 24 hours.3. Dives with decompression stops-wait 24 - 48 hours.My personal decision would be to wait at least 24 hours. It's better to be safe than sorry.