You may have a hard time finding a more affordable counter flow wort chiller. For the homebrewer on a budget, these heat exchangers are one the fastest ways to chill wort. Similar in efficiency to the Chillout plate chiller, but much easier to clean. Plate chillers have the disadvantage of getting gunked up in their small crevasses due to trapped hop material. This unit, on the other hand, can be easily and effectively flushed after use.

Copper is a great conductor of heat, making it more efficient than a stainless chiller of similar design. These units are 9" in diameter and about 7" high. The input and output are approximately 3/8" outer diameter (10mm). They can be used with gravity, but we recommend using a pump.

This copper counter flow chiller is probably one of the fastest ways to chill wort. This unit is similar in efficiency to the Chillout plate chiller, with the added benefit that it is easier to clean. Whereas a plate chiller has small crevasses to trap hop material, the counterflow chiller can be more effectively flushed out after use.
 
These units are 9" in diameter and about 7" high. The input and output are approximately 3/8" outside diameter (10mm). These can be used with gravity, although a pump is recommended.