So we are in our last week in Germany and we have temperatures reaching up to 38°C (100°F). These temperatures always bring up the argument about air conditioning between my girlfriend and I. Even though she has lived in Germany for several years now, she still does not understand why there are so few places in Germany with air conditioning. Particularly public transport, private houses and apartments are being debated during these arguments. And it is true, German houses and apartments rarely have air conditioning. Same goes for most public transport like busses and subways or streetcars. Even most of the older regional trains do not have air conditioning and those who have it (including the German bullet train ICE) sometimes can’t handle the temperature and you hear about air conditioning that collapsed on the train on the news.
However, most commercial buildings, like convenience stores and malls as well as a couple of public buildings like libraries and some offices in Germany do have air conditioning and I admit, that with temperatures above 30 to 35°C I am very happy that these places are keeping a cooler temperature. I will also say that sometimes I also wish for public transport to have air conditioning. It is just a much more pleasant ride when you are not sitting in a metal box which heats up like an oven in addition to your and the other peoples body odor which I would gladly like to spare myself from. But for myself, I can say that below temperatures of 30°C I do not see the benefit of an air conditioning unit. When your apartment is warm, just close the windows and curtains during the day and let some fresh air in as soon as the sun goes down (this is the German way). That normally should keep your apartment at a nice temperature. Even when it gets really hot for one or two days, this method generally works just fine. If it stays hot however, the whole building will just heat up and even the cooler temperatures at night won’t help. In these cases I would not be opposed to having air conditioning and I am always happy to be in places which have it.
However, according to the German Weather Service (http://www.dwd.de) the general average of days which have been over 30°C from 1981 to 2010 is 6,5 days per year. So my main question in all these arguments is: “Is it worth buying expensive air conditioning units and using huge amounts of energy for just about one or two weeks of convenience?” Of course it is hard to just argue with the average for all of Germany when there are so many different places which count into that number. Germanys highest mountain (the Zugspitze) and its 0 days of 30°C and above in 30 years is just as much a part of this average as two places with over 20 days of such high temperature per year. In the region we currently live, for example, the records show 12 days per year as the average for temperatures reaching above 30°C. So we have to handle this number with caution and be aware that it does not necessarily display the actual situation in Germany. Especially this year 6.9 days or even 12 days above 30°C seems like a joke. We had at least three weeks until now which were constantly above this temperature and will most likely see a fourth or fifth in the future.
There are of course places where I would wish for a proper air conditioning. The university my girlfriend and I studied at is the first place that comes to my mind. Sitting in a room with 80 people for 2 or even 4 hours straight is too much for just opening the windows really quick during the break and in between classes. Especially in the summer, and I am not just talking about the really hot temperatures, it is almost unbearable to stay in such a room for a long time and pay attention throughout. Same goes for most restaurants in Germany (yes most of them do not have air conditioning). It would be just so much more enjoyable even during warm temperatures to have your meal in an acclimatized room and not sweat so profusely (in addition to all the other people in there) that you have no appetite anymore after five minutes.
So how can you, based on actual facts and not just preference, decide if it is worth having an air conditioning or not? How can you justify buying a unit and spending a lot of energy and therefore money on it? From my perspective the answer seems to be: You can’t. You cannot base your decision for or against an air conditioning on the number of hot days per year. This is because everybody defines “hot” differently and the number of days varies from region to region and year to year. It is all just a question of preference and convenience. This statement is setting aside of course places like universities, where air conditioning would be more then beneficial to increase productivity thought the year. Some people might say now that this is also the case for your own house or apartment where you want to be productive as well when the temperatures rise. But are two or three weeks of decreased productivity a year at home so much that you have to have air conditioning? I guess when we ask this way, we are back at your own personal preference. Some people might not care about these weeks while others do.
When you are used to having constant air conditioning and a steady temperature in your apartment throughout the year, I can understand how not having air conditioning might be annoying or plain unacceptable (I don’t want to go into too much detail on those convenience stores in the US which cool down a large building in the middle of summer so that you have to wear a sweater inside, which is just a waste of energy in my opinion). However, when you are used to not having air conditioning in your house or apartment at all, you don’t miss it, except of course those few really hot days a year. But from my perspective it is not worth spending money on a unit and use a lot of energy in the process just for your personal convenience for three weeks a year (maximum).
So in conclusion, I think that neither the overly excessive use of air conditioning in the US is the way to go, nor the German way of having almost none at all. If we could find a way which takes both countries to a similar level of air conditioning use, we could save quite a bit of money and a lot of energy on one end, have a more pleasant summer on the other and less arguments in cross-national relationships