Condensation type gas water heater

The utility model relates to a condensation type gas water heater which comprises a combustion chamber, a condenser, a smoke exhaust pipe connector, an atomization assembly and an exhaust assembly. The water inlet end of the atomization assembly communicates with a water outlet of the condenser and is used for atomizing condensate water. The exhaust assembly is arranged between the condenser and the smoke exhaust pipe joint and comprises a body, a contraction channel and a diffusion channel which are communicated with each other are arranged in the body, the air inlet end of the contraction channel is communicated with the smoke outlet of the condenser, the air outlet end of the diffusion channel is communicated with the smoke exhaust pipe joint, and the diffusion channel is communicated with the air outlet end of the atomization assembly. According to the water heater, the exhaust assembly can quickly exhaust the smoke and the atomized condensate water from the smoke suction pipe, an external drainage pipe i