I have no idea why this system has no return air ducts. These devices are connected to ducts that deliver heated air to registers throughout the house. Unlike Europeans, however, most Americans insist on central air conditioning in their homes.
UPDATED on October 2, 2014 with more information on duct system design. Different types of furnaces are manufactured to burn a variety of fuels, including natural gas, propane, oil, and firewood. It’s easier to provide whole-house air-conditioning in a home with a duct system.
The following medical conditions are some of the possible causes of Liver infection.
There are likely to be other possible causes, so ask your doctor about your symptoms.
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Furnace efficiency is usually calculated using a laboratory procedure that measures an appliance’s “annual fuel utilization efficiency,” or AFUE.
This section discusses 12 medical conditions causing Liver infection.
A simple discussion of these causes with additional information is below.
It stores bile, which is a liquid produced in the liver.
The gallbladder releases bile into the small bowel to help break down fats.