Testo 310 Combustion Analyzer - $600 (Wrentham)

Great tool and works very well, moving out of the HVAC industry and need to sell.
Printer and all accessories are included.
Precise and professional residential combustion measurements every time with the testo 310 The fully-featured testo 310 completes your residential combustion tuning and safety checks or new combustion unit installations with ease.
With its 10 hour battery and five different fuel types (natural gas, propane, fuel oil 2, biomass 5%, and wood 20%) to select from, it provides the flexibility you need for a wide variety of applications including checking furnace efficiency, boiler tuning, and water heater checks.
Productive and Professional The testo 310 is ready to test in just 30 seconds.
The bight, backlit 5-line display shows more measurements to gives you a complete picture of the task at hand while the rechargeable lithium battery allows for all day operation.
Print professional documentation on the job site with the wireless printer