Gas and oil water heaters
When it comes to water-heater selection, two considerations are key: a unit’s fuel type and first-hour rate (FHR). Consider both, but focus most on a unit’s FHR – the number of gallons of hot water that can be produced in the first hour – to avoid the disappointment of running out of hot water.
24 Heating & Cooling provides 24-hour assistance with water heater services and repairs in Chicago and suburbs.
Recommended products
Gas water heater

Producer/brand: American Standard
Model/submodel: 75-76-AS
Energy saver: n/a
Product highlights: Show highlights
- Heavy Gauge Steel Tank for extra years of trouble-free service.
- Inner tank glass-lined with Dura-Glas™ and fired at 1600° F for optimum protection from the effects of corrosion.
- R-16.7 non-CFC foam insulated to save energy and reduce fuel costs by maximizing heat retention.
- Two anode rods to prolong tank life.
- Self-Cleaning turbulence inducing cold water inlet-tube engineered to diminish hard water area sediment deposits.
- Full size hand-hole cleanout for eased tank inspection and/or removal of sediment deposits.
- Furnished with four heavy gauge steel legs designed to maximize durability and afford rock-steady installation.
- Automatic non-electric gas thermostat adjustable to 180° F. When installed with a mixing valve, the 75-76-AS can deliver 180° F sanitizing and 140° F general purpose hot water simultaneously.
- Hinged with knob outside access combustion chamber door and sliding inner door to sequester burner and pilot area for added safety.
- Factory installed energy cut-off system and pressure/temperature relief valve.
- Small vent size and top mount 11/2″ water connections to afford universal replacement of other brands.
- AMERICAN STANDARD gas water heaters are certified at 300 PSI test pressure and for 150 PSI working pressure.
- All tanks are hydrostatically tested at the factory.
- Tested and listed with CSA International in accordance with ANSI Z21.10.3 – CSA 4.3 for up to 180° F operation as an automatic storage and/or automatic circulating tank heater. ASHRAE Standard 90.1 1999 addendum 90.1b and is NSF approved.
Gas water heater

Producer/brand: American Standard
Model/submodel: D-80-180-AS
Energy saver: n/a
Product highlights: Show highlights
- Heavy Gauge Steel Tank incorporating fewer internal flue tubes resulting in fewer critical welds to yield added years of trouble-free service.
- Inner tank glass–lined with Dura–Glas™ and fired at 1600° F for optimum protection from the effects of corrosion.
- R-8.3 non–CFC foam insulated to save energy and reduce fuel costs by maximizing heat retention.
- Four anode rods to ensure maximum tank life.
- Full size hand–hole cleanout for eased tank inspection and/or removal of sediment deposits.
- Electronic direct–spark ignition system saves fuel by eliminating the need for a standby gas pilot.
- Automatic motorized flue damper reduces tank heat loss during standby periods for lowest operating costs.
- Fully adjustable 24–volt controls provide temperature settings to 180° F.
- When installed with a mixing valve, the D-80-180-AS can deliver 180° F sanitizing and 140° F general purpose hot water simultaneously.
- Factory installed energy cut–off system and pressure/temperature relief valve.
- Top 11/2″, 2″ rear and 2″ front water connections for universal replacements, connection to circulating lines and eased multiple heater or storage tank installations.
- AMERICAN STANDARD gas water heaters are certified at 300 PSI test pressure and for 150 PSI working pressure. All tanks are hydrostatically tested at the factory.
- Tested and listed with CSA International in accordance with ANSI Z21.10.3 – CSA 4.3 for up to 180° F operation as an automatic storage and/or automatic circulating tank heater. ASHRAE Standard 90.1 1999 addendum 90.1b and is NSF approved.
Heavy duty direct spark ignition water heater

Producer/brand: American Standard
Model/submodel: D-100-250-AS
Energy saver: n/a
Product highlights: Show highlights
- Heavy Gauge Steel Tank incorporating only seven internal flue tubes resulting in fewer critical welds to yield added years of service.
- ASME Construction Model available.
- Inner tank glass-lined with Dura-Glas™ and fired at 1600° F for optimum protection from the effects of corrosion.
- R-8.3 non-CFC foam insulated to save energy and reduce fuel costs by maximizing heat retention.
- Four anode rods to ensure maximum tank life.
- Self-Cleaning turbulence inducing cold water inlet-tube engineered to diminish hard water area sediment deposits.
- Full size hand-hole cleanout for eased tank inspection and/or removal of sediment
- deposits.
- Electronic direct-spark ignition system saves fuel by eliminating the need for a standby gas pilot.
- Automatic motorized flue damper reduces tank heat loss during standby periods for lowest operating costs.
- Fully adjustable 24-volt controls provide temperature settings to 180° F. When installed with a mixing valve, the D-100-250-AS can deliver 180° F sanitizing and 140° F general purpose hot water simultaneously.
- Factory installed energy cut-off system and pressure/temperature valve.
- Top 11/2″, 2″ rear and 2″ front water connections for universal replacements, connection to circulating lines and eased multiple heater or storage tank installations.
Heavy duty direct ignition tall water heater

Producer/brand: American Standard
Model/submodel: D-100T-199-AS (TALL)
Energy saver: n/a
Product highlights: Show highlights
- Heavy Gauge Steel Tank incorporating fewer internal flue tubes resulting in fewer critical welds to yield added years of trouble-free service.
- Inner tank glass-lined with Dura-Glasand fired at 1600‹ F for optimum protection from the effects of corrosion.
- R-8.3 non-CFC foam insulated to save energy and reduce fuel costs by maximizing heat retention.
- Four anode rods to ensure maximum tank life.
- Self-Cleaning turbulence inducing cold water inlet-tube engineered to diminish hard water area sediment deposits.
- Full size hand-hole cleanout for eased tank inspection and/or removal of sediment deposits.
- Electronic direct-spark ignition system saves fuel by eliminating the need for a standby gas pilot.
- Automatic motorized flue damper reduces tank heat loss during standby periods for lowest operating costs.
- Fully adjustable 24-volt controls provide temperature settings to 180‹ F.When installed with a mixing valve, the D-100T-199-AS can deliver 180‹ F sanitizing and 140‹ F general purpose hot water simultaneously.
- Factory installed energy cut-off system and pressure/temperature relief valve.
- Top 11.2″, 2″ rear and 2″ front water connections for universal replacements, connection to circulating lines and eased multiple heater or storage tank installations.
- AMERICAN STANDARD gas water heaters are certified at 300 PSI test pressure and for 150 PSI working pressureAll tanks are hydrostatically tested at the factory.
- Tested and listed with CSA International in accordance with ANSI Z21.10.3 – CSA 4.3 for up to 180‹ F operation as an automatic storage and/or automatic circulating tank heater. ASHRAE Standard 90.1 1999 addendum 90.1b and is NSF approved.
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