Commercial/Industrial Water Heaters Featuring Bock's Legendary Turb@flue Multiple heat exchangers inside each unit with hundreds of turbofins to boost heat transfer -heating water faster with fess fuei. 166 to275Gallon Capacities 400,000to1,500,000BTU Wet Leg Design - Combustion chamber is surrounded by water on aii sides for continuous operation and additionalheat transfer © ^ Iass Coba/t-enriched Glass-Lined Tank Mu/tip/e Magnesium Anode Rods (from 4 to 11 by mode/) to Inhibit Corrosio

BCS sidewall venting offers these benefits: ^ Air is warmed before entering burner to improve combustion efficiency ^ Burner operation is unaffected by room exhaust fans or negative air issues ^ Corrosive aerosols near water heater are not drawn into burner 5-Year limited warranty on residential installations 3-Year limited warranty on commercial installations 80023.indd 1 5/20/2008 2:24:25 PM Drain Valve/ Return 20e-BCS T3 n EH 32E/PG-BCS, 51E/PG-BCS TZJ [ZT 40E/PG-BCS 120E/PG-B

BCS sidewall venting offers these benefits: ^ Air is warmed before entering burner to improve combustion efficiency ^ Burner operation is unaffected by room exhaust fans or negative air issues ^ Corrosive aerosols near water heater are not drawn into burner 5-Year limited warranty on residential installations 3-Year limited warranty on commercial installations 80023.indd 1 5/20/2008 2:24:25 PM Drain Valve/ Return 20e-BCS T3 n EH 32E/PG-BCS, 51E/PG-BCS TZJ [ZT 40E/PG-BCS 120E/PG-B

BCS sidewall venting offers these benefits: ^ Air is warmed before entering burner to improve combustion efficiency ^ Burner operation is unaffected by room exhaust fans or negative air issues ^ Corrosive aerosols near water heater are not drawn into burner 5-Year limited warranty on residential installations 3-Year limited warranty on commercial installations 80023.indd 1 5/20/2008 2:24:25 PM Drain Valve/ Return 20e-BCS T3 n EH 32E/PG-BCS, 51E/PG-BCS TZJ [ZT 40E/PG-BCS 120E/PG-B

BCS sidewall venting offers these benefits: ^ Air is warmed before entering burner to improve combustion efficiency ^ Burner operation is unaffected by room exhaust fans or negative air issues ^ Corrosive aerosols near water heater are not drawn into burner 5-Year limited warranty on residential installations 3-Year limited warranty on commercial installations 80023.indd 1 5/20/2008 2:24:25 PM Drain Valve/ Return 20e-BCS T3 n EH 32E/PG-BCS, 51E/PG-BCS TZJ [ZT 40E/PG-BCS 120E/PG-B

alve or anti-scald valve be installed and used according to the manufacturer's directions to prevent scalding. v110 South Dickinson Street, Madison, Wisconsin 53703 Toll Free 800.794.2491 • Phone 608.257.2225• Fax 608.257.5304 80023 Rev 2/08 80023.indd 2 5/20/2008 2:24:28 PM

BCS sidewall venting offers these benefits: ^ Air is warmed before entering burner to improve combustion efficiency ^ Burner operation is unaffected by room exhaust fans or negative air issues ^ Corrosive aerosols near water heater are not drawn into burner 5-Year limited warranty on residential installations 3-Year limited warranty on commercial installations 80023.indd 1 5/20/2008 2:24:25 PM Drain Valve/ Return 20e-BCS T3 n EH 32E/PG-BCS, 51E/PG-BCS TZJ [ZT 40E/PG-BCS 120E/PG-B

BCS sidewall venting offers these benefits: ^ Air is warmed before entering burner to improve combustion efficiency ^ Burner operation is unaffected by room exhaust fans or negative air issues ^ Corrosive aerosols near water heater are not drawn into burner 5-Year limited warranty on residential installations 3-Year limited warranty on commercial installations 80023.indd 1 5/20/2008 2:24:25 PM Drain Valve/ Return 20e-BCS T3 n EH 32E/PG-BCS, 51E/PG-BCS TZJ [ZT 40E/PG-BCS 120E/PG-B

BCS sidewall venting offers these benefits: ^ Air is warmed before entering burner to improve combustion efficiency ^ Burner operation is unaffected by room exhaust fans or negative air issues ^ Corrosive aerosols near water heater are not drawn into burner 5-Year limited warranty on residential installations 3-Year limited warranty on commercial installations 80023.indd 1 5/20/2008 2:24:25 PM Drain Valve/ Return 20e-BCS T3 n EH 32E/PG-BCS, 51E/PG-BCS TZJ [ZT 40E/PG-BCS 120E/PG-B

BCS sidewall venting offers these benefits: ^ Air is warmed before entering burner to improve combustion efficiency ^ Burner operation is unaffected by room exhaust fans or negative air issues ^ Corrosive aerosols near water heater are not drawn into burner 5-Year limited warranty on residential installations 3-Year limited warranty on commercial installations 80023.indd 1 5/20/2008 2:24:25 PM Drain Valve/ Return 20e-BCS T3 n EH 32E/PG-BCS, 51E/PG-BCS TZJ [ZT 40E/PG-BCS 120E/PG-B