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ProLine® Ultra-Low NOx Direct Vent 40-Gallon Gas Water Heater

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ProLine® Ultra-Low NOx Direct Vent 40-Gallon Gas Water Heater

ProLine® Ultra-Low NOx Direct Vent 40-Gallon Gas Water Heater

Model GDNL-40L-100

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A.O. Smith products are available through independent plumbing contractors.

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Product Description

The ProLine® Ultra-Low NOx Direct Vent residential gas water heaters offer horizontal or vertical venting options in an FVIR solution to reduce the risk of accidental fires involving flammable vapors.

Featuring a 40-gallon (nominal) tank and a 36,000 BTU gas burner, the GDNL-40L-100 Direct Vent Ultra-Low NOx delivers a first hour rating of 72 gallons and a recovery rate of 39 gallons per hour. With an 0.59 Uniform Energy Factor, this water heater is not ENERGY STAR® qualified. It carries a 6-year limited tank warranty, and meets Ultra-Low NOx emission requirements.

Where to Buy

Where to Buy

Location Unknown

A.O. Smith products are available through independent plumbing contractors.

Enter your city and state or zip code below to find a local installer.


Certifications

check mark icon

6

year

limited warranty

leaf icon

0.59

Uniform Energy Factor

UL Listed means that the product met UL's safety requirements
CSA International Low Lead Content Certification in compliance with U.S. and Canadian safety standards on gas components
AHRI Air-Conditioning, Heating and Refrigeration Institute
CSA International Design Certification The CSA Blue Star indicates the product is certified to applicable U.S. standards for appliances using gas or other petroleum fuel

Tech Specs

  • Nominal Capacity:
    ?Nominal capacity is the representative number pursuant to the safety standard certification process for water heaters
     40
  • Rated Storage Volume
    ?Rated Storage Volume = Rated storage volume is the measured storage volume defined by the Department of Energy.
     39
  • UEF 0.59
  • Maximum BTUs: 36,000
  • Power Source: Natural Gas
  • Limited Tank Warranty: 6 Years
  • Limited Parts Warranty: 6 Years
  • Anode: Coregard™ Sacrificial Anode
  • T&P Relief Valve: Yes
  • Water Connection Location: Top
  • Water Connection Size: 3/4"
  • Emissions: Ultra-Low NOx
  • First Hour Rating: 64

Dimensions & Venting

  • Type: Tall
  • Height: 50"
  • Height w/Draft Hood: 65"
  • Diameter: 22"
  • Width: 22"
  • Depth: 22"
  • Vent Type: Direct Vent

Flammable Vapor Resistant/Direct Vent Sealed Combustion System

Thru-the-Wall/Thru-the-Roof venting of combustion products, air for combustion is drawn from outside the building.

Durable, Ultra-Low Nox Burner Construction

Components of the burner system are made of a strong inconel alloy and stainless steel that is designed to withstand high temperature applications.

Non-CFC Foam Insulation

The tank is surrounded by a thick coat of non-CFC polyurethane foam to trap heat inside the tank, saving energy.

3/4" Top Water Connections and Side Space Heating Connections

Gas water heaters heat water by burning either natural gas or LP (propane). Gas water heaters need a source of air and also need to be vented properly. Cold water enters the water heater through an internal “dip tube” which forces the cold water to the bottom of the tank and pushes hot water out through the outlet connection. This arrangement provides the most hot water for a given tank size. Most gas water heaters use a pilot light. The pilot light on some models also generates the power needed to operate an electronic gas valve. When cold water enters the tank, the temperature sensor on the gas control tells the main gas valve to open. Gas flows to the burner where it is lit by the pilot light. The air needed by the burner is supplied by the room where the water heater is installed. The exhaust gases are vented to the outside. When the proper temperature is reached, the main gas valve shuts off. Because water can corrode the steel tank, we glass line the inside of the tank and install an anode rod to help reduce corrosion. The temperature and pressure relief valve is a safety device designed to open if the internal temperature or pressure of the tank exceeds certain limits. Water heaters should be large enough to provide adequate hot water even when temperatures are cold and household demand is greatest.

Rebate and incentive programs provide cash-back to consumers for the purchase of appliances that meet certain energy efficiency standards. Often, these standards are tied to the ENERGY STAR® certification program.

Cash for Appliances is designed to encourage the purchase of energy efficient appliances. Consumers who purchase ENERGY STAR® certified or CEE qualified appliances can receive cash rebates. Most states are offering rebates in the $50 to $250 range.

Is this enough hot water?

Fairfield, CT 06828

Change Location or Advanced Settings
info

Number of minutes you can enjoy a shower before running out of hot water. Assumes a 2.2 GPM flow rate.

Need to view or change our assumptions? Access the advanced settings.

Close
info
Number of minutes you can enjoy a shower before running out of hot water. Assumes a 2.2 GPM flow rate.

Need to view or change our assumptions? Access the advanced settings.

minutes

single shower length

info

Number of back-to-back showers you can take without running out of hot water. Assumes a 2.2 GPM flow rate and an 8 minute shower length.

Need to view or change our assumptions? Access the advanced settings.

Close
info
Number of back-to-back showers you can take without running out of hot water. Assumes a 2.2 GPM flow rate and an 8 minute shower length.

Need to view or change our assumptions? Access the advanced settings.

showers

back-to-back

info

Number of showers you can take at the same time without running out of hot water.Assumes a 2.2 GPM flow rate and an 8 minute shower length.

Need to view or change our assumptions? Access the advanced settings.

Close
info
Number of showers you can take at the same time without running out of hot water.Assumes a 2.2 GPM flow rate and an 8 minute shower length.

Need to view or change our assumptions? Access the advanced settings.

showers

at the same time

info

Biggest tub this water heater will fill without running out of hot water. Assumes a 5.0 GPM flow rate, and a 67% fill level.

Need to view or change our assumptions? Access the advanced settings.

Close
info
Biggest tub this water heater will fill without running out of hot water. Assumes a 5.0 GPM flow rate, and a 67% fill level.

Need to view or change our assumptions? Access the advanced settings.

gallons

maximum tub size

info

Number of minutes required to fill a 55 gallon tub. Assumes a 5.0 GPM flow rate and a 67% fill level.

Need to view or change our assumptions? Access the advanced settings.

Close
info
Number of minutes required to fill a 55 gallon tub. Assumes a 5.0 GPM flow rate and a 67% fill level.

Need to view or change our assumptions? Access the advanced settings.

minutes

time to fill tub

info

The estimated annual cost to operate this water heater in Fairfield, CT.

Need to view or change our assumptions? Access the advanced settings.

Close
info
The estimated annual cost to operate this water heater in Fairfield, CT.

Need to view or change our assumptions? Access the advanced settings.

$

estimated energy cost

Many factors affect the actual performance of a water heater. This represents our closest approximation of your likely experience with this water heater in Fairfield, CT, but actual performance may vary depending on factors beyond our ability to control or estimate. To view or adjust our assumptions of the most common factors that impact this product’s performance in Fairfield, CT, please view the advanced settings. *Annual energy costs are estimated from the energy efficiency of each water heater, your household’s estimated water usage & set temperature, the average groundwater temperature for your location, and residential energy prices as reported by the Department of Energy.

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Where to Buy

A. O. Smith water heaters are available through your local plumbing professional.

Product Features & Options

Flammable Vapor Resistant/Direct Vent Sealed Combustion System

Thru-the-Wall/Thru-the-Roof venting of combustion products, air for combustion is drawn from outside the building.

Durable, Ultra-Low Nox Burner Construction

Components of the burner system are made of a strong inconel alloy and stainless steel that is designed to withstand high temperature applications.

Non-CFC Foam Insulation

The tank is surrounded by a thick coat of non-CFC polyurethane foam to trap heat inside the tank, saving energy.

3/4" Top Water Connections and Side Space Heating Connections

How it Works

Gas water heaters heat water by burning either natural gas or LP (propane). Gas water heaters need a source of air and also need to be vented properly. Cold water enters the water heater through an internal “dip tube” which forces the cold water to the bottom of the tank and pushes hot water out through the outlet connection. This arrangement provides the most hot water for a given tank size. Most gas water heaters use a pilot light. The pilot light on some models also generates the power needed to operate an electronic gas valve. When cold water enters the tank, the temperature sensor on the gas control tells the main gas valve to open. Gas flows to the burner where it is lit by the pilot light. The air needed by the burner is supplied by the room where the water heater is installed. The exhaust gases are vented to the outside. When the proper temperature is reached, the main gas valve shuts off. Because water can corrode the steel tank, we glass line the inside of the tank and install an anode rod to help reduce corrosion. The temperature and pressure relief valve is a safety device designed to open if the internal temperature or pressure of the tank exceeds certain limits. Water heaters should be large enough to provide adequate hot water even when temperatures are cold and household demand is greatest.

Certifications

6

year

limited warranty

0.59

Uniform Energy Factor

CSA International Low Lead Content Certification in compliance with U.S. and Canadian safety standards on gas components
The Blue Diamond formula is enriched with a high level of zircon, producing a coating that is harder and more water-resistant than any other in the industry
CSA International Design Certification The CSA Blue Star indicates the product is certified to applicable U.S. standards for appliances using gas or other petroleum fuel
Green Choice is an environmentally friendly gas burner that cuts residential water heater emissions - NOx - by up to 33% and is used in both natural or propane gas water-heater models

Product Specifications


Tech Specs
Nominal Capacity:
?Nominal capacity is the representative number pursuant to the safety standard certification process for water heaters
 40
Rated Storage Volume
?Rated Storage Volume = Rated storage volume is the measured storage volume defined by the Department of Energy.
 39
UEF 0.59
Maximum BTUs: 36,000
Power Source: Natural Gas
Limited Tank Warranty: 6 Years
Limited Parts Warranty: 6 Years
Anode: Coregard™ Sacrificial Anode
T&P Relief Valve: Yes
Water Connection Location: Top
Water Connection Size: 3/4"
Emissions: Ultra-Low NOx
First Hour Rating: 64
Dimensions & Venting
Type: Tall
Height: 50"
Height w/Draft Hood: 65"
Diameter: 22"
Width: 22"
Depth: 22"
Vent Type: Direct Vent

Incentives

Rebate and incentive programs provide cash-back to consumers for the purchase of appliances that meet certain energy efficiency standards. Often, these standards are tied to the ENERGY STAR® certification program.

Cash for Appliances is designed to encourage the purchase of energy efficient appliances. Consumers who purchase ENERGY STAR® certified or CEE qualified appliances can receive cash rebates. Most states are offering rebates in the $50 to $250 range.

Photos

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Need More Hot Water?

There's no reason to run out of hot water. If you're not sure that the GDNL-40L-100 provides enough hot water for your needs, consider these:

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