would it be best to have a refrigerator set at 29 degrees or 43.5 degrees celcius?

If they are both celsius -- you don't want either setting.

http://www.texloc.com/closet/cl_cel_fah_chart.html

I do not think anyone would be interested in setting the refrigerator at 43.5° Celsius because it is hotter than most countries on earth.

According to general recommendations, it should be set between 35 to 38 degrees Fahrenheit, or 1.7 to 3.3 Celsius.

See for example:
http://home.howstuffworks.com/question121.htm

Thank yo both so much!! I think I figured it out!!

Mathmate and Ms. Sue were too nice to tell you that you misspelled celsius. They wrote it correctly but you may not have noticed. Please note the correct spelling.

When it comes to refrigerators, it is generally recommended to set the temperature in terms of degrees Celsius, not degrees Fahrenheit. The ideal temperature for a refrigerator is typically between 2 to 4 degrees Celsius (35.6 to 39.2 degrees Fahrenheit).

Setting a refrigerator at 29 degrees Celsius (84.2 degrees Fahrenheit) or 43.5 degrees Celsius (110.3 degrees Fahrenheit) would not be suitable for refrigeration purposes. These temperatures are much higher than the recommended range and can lead to several issues.

To select the appropriate temperature for your refrigerator, follow these steps:
1. Consult the manufacturer's guidelines: Refer to the user manual or manufacturer's website for specific recommendations regarding the ideal temperature range for your refrigerator model.
2. Consider food safety: Refrigerators are designed to keep perishable foods fresh by slowing down bacterial growth. The recommended temperature range helps maintain food safety and prevents spoilage.
3. Test and adjust: Place a thermometer inside the refrigerator (at the middle shelf) and let it sit for a few hours to get an accurate reading of the current temperature. If it is not within the recommended range, adjust the temperature setting accordingly.

Remember that refrigerators operate most efficiently when properly filled with food and when the door is not frequently opened for extended periods.