Heat exchange system with siphon for draining a condensate

A heat exchange system comprising:

• a heat exchange main unit having a gas channel and a fluid channel configured such that a fluid in the fluid channel can exchange heat with a flue gas in the gas channel in use,
• a housing accommodating the heat exchange main unit;
• a drain collecting part arranged inside the housing to collect condensate from the flue gas;
• and
• a siphon detachably attached to the drain collecting part to prevent release of the flue gas from a condensate outlet formed therein,
• the siphon having a tubular body, a condensate inlet formed on one end side of the tubular body, and the condensate outlet formed on an other end side of the tubular body,
• the tubular body having
• an attaching part arranged on the end side of the tubular body on which the condensate inlet is formed that is usable to detachably attach the tubular body to the drain collecting part through a hole formed within a wall of the housing, and
• a grip arranged on the other end side of the tubular body on which the condensate outlet is formed to be located outside the housing when the tubular body is attached to the drain collecting part.