1 How can I change my privacy settings so only my friends can... 2  How can I change my privacy settings so only my friends can... 3  Related Help Center FAQs. 4  How do I control who can see posts that friends make on my T... went to privacy settings and set the default privacy to only friends but people who are not my friends can still see my wall and all my photos and everything on my facebook. Privacy.
It should be 3 feet from the gas meter vent, and not the actual gas meter itself. The gas company can come out later to extend this vent further away from the meter if it is within 3 feet. But the chance that anything actually happening because of the ac too close to the vent is insanely remote.
Centre for Atmospheric Science. Standard optical particle counters are not able to measure particles much below 50nm. To count smaller particles still Condensation Particle Counters are used, and can count all particles down to 2nm (depending on specific model).chematic of a Condensation Particle Counter. In a counter using the diffusional thermal cooling method, particle laden air passes through a heated porous block or wick in contact with the working fluid, which is usually butanol, and becomes saturated.