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

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

These units use indirect water-to-water heat transfer by circulating boiler-fed hot water through a coil inside the water tank. Ideal for applications that use boilers for space heating Whatever your hot water needs, there's a Bock, just right for you. é é é è7 year limited warranty on residential installations. S3 year limited warranty on commercial installations. C x/uw- durable and exclusive porcelain enamel glass lines all tanks and coils. Highly resistant to aggressive water. Not susce

TO VENT OUTLET G FL. TO AIR INTAKE H FL. TO T&P VALVE WATER CONN. DIA. 60 Gallon Models 57 28 1/4 42 13 53 1/2 5 52 1/2 40 1 1/2 100 Gallon Models 77 5/8 28 1/4 63 13 74 3/4 5 74.75 60 1.5 MODEL NUMBER STORAGE (GAL) RATED INPUT (BTUH) THERMAL EFF % 1ST HR DEL GAL. @ 100° F RISE RECOVERY GPH @ DEGREE RISE MAX 3” PVC, ABS & CPVC MAX 4” PVC, ABS & CPVC SHIPPING WT (LBS) 40° F 100° F 140° F 60HEC-125 60 125,000 96.0% 187 364 145 104 120 ft 170 ft 570 60HEC-150 60 150,000 93.0% 211 42

Power Direct Vent Gas Water Heaters 80% Thermal Efficient 4 80 to 100 gallons/300,000 to 360,000 BTU 4 Co-axial vent 4 Sealed combustion 4 Low NOx construction available 4 Electronic ignition and controls 4 Non-CFC foam insulation 4 Automatic blower motor 4 Glass-lined storage tank 4 Hand hole cleanout 4 Sediment reduction system 4 Standard and ASME construction 4 NSF kit available 4 Complies with SCAQMD low NOx requirements 4 Design certified by CSA International (formerly AGA/C

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