Prepared with an electric tea kettle for boiling water (thank you, Grandma Joy!), a ThermaPen 5 thermometer, a timer, and a measuring cup, we began the experiment.
First, to establish the control condition, we ran the test without the Chemex cozy, taking temperature readings at 20 seconds, 5 minutes, 10 minutes, 20 minutes, and 30 minutes. (After 30 minutes, I would normally have had all the coffee I made, so keeping it warm for longer than that was unnecessary ) I used water rather than brewed coffee. However, I kept a filter with wet grounds in it as a cap on the carafe, since this is the normal way I keep the carafe covered as I'm drinking coffee in the morning.
Here's what we found:
20 seconds: 182 degrees
5 minutes: 158 degrees (-24)
10 minutes: 145 degrees (-13)
20 minutes: 130 degrees (-15)
30 minutes: 115 degrees (-15)
Total drop: 67 degrees over 30 minutes
Then we ran the experiment again, this time with the GJoy Chemex Cozy. Here's what we found:
20 seconds: 178 degrees
5 minutes: 169 degrees (-09)
10 minutes: 165 degrees (-04)
20 minutes*: 149 degrees (-16)
30 minutes: 142 degrees (-07)
Total drop: 36 degrees over 30 minutes
* Actually, this reading was taken at 21 minutes. I had some trouble with the thermometer not turning on right away. I had the same problem at 30 minutes -- it didn't turn on right away -- but I turned it on earlier to make sure it was ready to go at 30 minutes.
First, to establish the control condition, we ran the test without the Chemex cozy, taking temperature readings at 20 seconds, 5 minutes, 10 minutes, 20 minutes, and 30 minutes. (After 30 minutes, I would normally have had all the coffee I made, so keeping it warm for longer than that was unnecessary ) I used water rather than brewed coffee. However, I kept a filter with wet grounds in it as a cap on the carafe, since this is the normal way I keep the carafe covered as I'm drinking coffee in the morning.
Here's what we found:
 |
| 20 seconds 5 minutes 10 minutes 20 minutes 30 minutes |
20 seconds: 182 degrees
5 minutes: 158 degrees (-24)
10 minutes: 145 degrees (-13)
20 minutes: 130 degrees (-15)
30 minutes: 115 degrees (-15)
Total drop: 67 degrees over 30 minutes
Then we ran the experiment again, this time with the GJoy Chemex Cozy. Here's what we found:
 |
| 20 seconds 5 minutes 10 minutes 20 minutes 30 minutes |
20 seconds: 178 degrees
5 minutes: 169 degrees (-09)
10 minutes: 165 degrees (-04)
20 minutes*: 149 degrees (-16)
30 minutes: 142 degrees (-07)
Total drop: 36 degrees over 30 minutes
* Actually, this reading was taken at 21 minutes. I had some trouble with the thermometer not turning on right away. I had the same problem at 30 minutes -- it didn't turn on right away -- but I turned it on earlier to make sure it was ready to go at 30 minutes.
Admirable methodology. One data point sticks out as outside the margin of error, however... After a mere 20 seconds is it not peculiar that the un-Cozied pot would be 4 degrees cooler than the pot in the GJoy Chemex Cozy?
ReplyDeleteOne further issue not addressed in this study: the Chemex Cozy™ was designed for use without the wooden orthopedic neck brace. This was under the assumption that the Chemex Cozy™ would hug the glass more closely than the wood contraption, and hence be a more effective insulator, as well as more comfortable to grip.
ReplyDeleteIf the test were conducted without the neck brace it would perform more in alignment with the designer's expectations.
Finally, the tests never discussed the outcome of utmost importance: is the coffee-drinking experience enhanced by the addition of the Chemex Cozy™??