I have a 2x6 with no hood and AUF, I average 33 Imperial gallons (39.6 US) an hour. not sure what type of wood i put in last night but i hit 39 Imperial 47(US) for about 10 minutes.
I fire every 10-12 minutes (small firebox)
I have a flow meter installed on my intake to very flow rates.
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2012 Year 1 - 6 taps
2013 Year 2 - 85 taps
2014 Year 3 - 150 taps - 22 gallons
2015 Year 4 200 taps - 15 Gallons
2016 Year 5 200 taps - 23 gallons
2017 Year 6 200 Buckets, 100 on 3/16 gravity)
2018 Year 7 200 Buckets , 175 on 3/16 with shurflo 4008
Patrick Phaneuf 2x6 raised flue
Polaris 6x6, 1990 Alpine Ski-doo
Sugar shack - 12X24 with 8x14 wood shed