10 minutes, 10 months, 10 years. Nobody knows. But the better it was installed and the the better you take care of it the longer it will last. I see systems that are 30 years old and operating like new and I see them 8 years old that need to be replaced.
With that caveat in mind, systems in the southern US, running most of the year, can be expected to last 8-10 years. In the middle to upper portion of the US, running 4-5 moths a year, 10-15 years. And in the upper states and lower provinces of Canada, running just a couple months a year, 15-20 years or more.
http://energyguild.hubpages.com/hub/How-Long-Will-My-Central-Air-Conditioner-Last
15 yrs
They should last as long as the house if they don't get wet.
It should be beneficial financially for you to run two air conditioning units at one time. By doing this you should be able to cool or heat the facility quickly so they will not have to run as long.
How long do house flies live
The amount of time it takes to cool down a house after turning air conditioning on would be dependent upon a number of factors. Some of those factors include the size of the home, insulation and outdoor temperature.
I have certainly seen air conditioners and attic vent fans last 20 years or more with proper service and maintenance. However, the typical life span of this equipment being manufactured today would be 5 to 10 years.
700 years
The most efficient and cost-effective air conditioning units for hotels are typically central air conditioning systems or variable refrigerant flow (VRF) systems. These systems are able to cool large spaces efficiently and can be controlled centrally, making them ideal for hotels. Additionally, they are energy-efficient, which can help reduce operating costs in the long run.
as long as any other modern house
They last 2 weeks
To determine how long a 100 mL vial will last when taking 80 units per day, you first need to know the concentration of the solution (i.e., how many units are in each mL). For example, if the concentration is 100 units/mL, then the vial contains 10,000 units total. Dividing 10,000 units by 80 units per day means the vial would last 125 days. Adjust the calculation based on the actual concentration to get the correct duration.
"Jardines" (Garden) (Yard of a house) "Patios" (Yard of a house) "Yardas" (Units of measure three feet long each)