Not so safe, but it all depends where you live in the city and all that. Downtown / midtown is the best, anything else is hit or miss. Areas on Moross St. by Grosse point are just as nice as anywhere else. Also, even though Detroit is arguably the most dangerous city in the country, suburbs are very safe.
Air conditioning tonnage has nothing to do with weight. A ton, as used in the HVAC field, is a term that describes how much heat the AC unit can remove from a home in one hour. The measurement for heat is the British thermal unit (BTU). One ton of air conditioning can remove 12,000 BTUs of air per hour. A four ton unit can move 48, 000 BTUs and so on. Therefore, the more tonnage an AC unit is rated at, the more air it can cool.
watt or ton of refrigeration. The SI derived unit for power is the watt. 1 watt is equal to 0.000284345136261 ton of refrigeration. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between watts and tons of refrigeration. Type in your own numbers in the form to convert the units! You can do the reverse unit conversion from ton of refrigeration to watt, or enter any two units below: I'm feeling lucky, show me some random units. The watt (symbol: W) is the SI derived unit for power. It is equivalent to one joule per second (1 J/s), or in electrical units, one volt ampere (1 VA).