If you are just doing air under the grates it doesn't need to be a high pressure blower like a bouncy house blower. Any squirrel cage blower would work. If you did go with the bouncy house blower, definitely have a way to adjust the air flow like a pvc ball valve.
Camp Wokanda
Peoria Park District
2020 - 210 taps 3/16 shurflo, upgraded hp pump on RO - 66 gallons
2019 - 150 taps 3/16 shurflo, Deer Run 125 dolly RO - 73 gallons
2018 - 120 taps 3/16 hybrid (shurflo), 2x6 raised flue w/hood, homemade arch w/ AUF & AOF - 34.5 gallons
2017 - 60 taps 3/16 gravity, oil tank arck w/ steam pans - 12.5 gallons