Hot Water Heaters

Water heaters and boilers are residential and commercial appliances that provide a continuous supply of hot water throughout a building for conditioning or washing. The variation in names and functions of hot water heaters is attributed to their capacity to heat drinking water, usage in the a range of purposes in the domestic or industrial sphere, and their respective energy sources. Fossil fuels are commonly used for heating water, but alternative energy, backed with fossil fuels or electricity, can also be implemented instead. Electric heat pump hot water heaters are another more efficient, but more expensive, option. Hot water for the purposes of space heating is heated in a boiler.

What size water heater do I need?

Determining what size water heater is needed requires figuring out the amount of water one uses during the busiest hour, or the time of day when the most hot water usage occurs. For a general estimate, a household of 1 to 2 people requires 30-40 gallons (114-151 liters). A household of 2 to 3 people calls for 40-50 gallons (151-189 liters) and 50-60 gallons (189-227 liters) for 3 to 4 people.

How long do water heaters last?

The general lifespan of a water heater ranges from 8 to 12 years. The exact life expectancy is dependent on the quality of water and installation as well as the overall design of the unit. A water heater headed towards 10 years is typically due for a replacement.

How do you install a water heater?

For a gas water heater, disconnect the gas and water lines and detach the gas exhaust. Then, set the water heater in position. Install both the heat valves and water line connections. The last step is to attach the gas line. For an electric water heater, move it into a drain pan and install both the T&P valve and discharge pipe. After, attach the hoses and fill up the water heater by removing the aerator and turning on the water supply. Connect any wiring and check that the tank is full by turning on the faucet.

Text by
Cecile Kim
Updated on

Hot Water Heaters

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Rheem Marathon Electric Water Heater - 85 Gallon

The Rheem Marathon Electric Water Heater (85 Gallon) features a bowl-shaped tank bottom that allows for complete sediments draining and a capacity ideal for a big family. The electric water heater is durable; hence can withstand a more extended period of usage, and the tank non-metallic surface is improvised to minimize rust and corrosion. The heater is also fitted with watertight grommets that reduce condensation and formation of overheated moisture.

The Rheem Marathon Electric Water Heater (85 Gal) has an overall height of 70.25” (178.4 cm) and diameter of 28.25” (71.8 cm). The Rheem Marathon Electric Water Heater (85 Gal) weighs 134 lb (60.8 kg) and has a tank capacity of 85 gal (322 L).

Dimensioned elevation and plan drawings of the Rheem Marathon Electric Water Heater (85 Gal) with height and diameter
The Rheem Marathon Electric Water Heater (85 Gallon) features a bowl-shaped tank bottom that allows for complete sediments draining and a capacity ideal for a big family. The electric water heater is durable; hence can withstand a more extended period of usage.

The Rheem Marathon Electric Water Heater (85 Gal) has an overall height of 70.25” (178.4 cm) and diameter of 28.25” (71.8 cm). The Rheem Marathon Electric Water Heater (85 Gal) weighs 134 lb (60.8 kg) and has a tank capacity of 85 gal (322 L).

Dimensioned elevation and plan drawings of the Rheem Marathon Electric Water Heater (85 Gal) with height and diameter
Rheem Marathon Electric Water Heater - 85 Gallon
Height:
70.25” | 178.4 cm
Width:
28.25” | 71.8 cm
Length:
Depth:
28.25” | 71.8 cm
Weight:
134 lb | 60.8 kg
Area:

Tank Capacity: 85 gal | 322 L

UEF: .92

Type
Electric Tank Water Heater
Designer
Rheem

Drawings include:
Rheem Marathon Electric Water Heater (85 Gallon) front elevation, plan

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Rheem Performance Tankless Electric Water Heater - 8.8 GPM

The Rheem Performance Tankless Electric Water Heater (8.8 GPM) is mainly for residential use either in the whole house or point-to-point use for a sink, dishwasher, shower, and bathtub. Because of their small size, low cost, and maintenance, they can be installed under a sink or cabinets, on the wall, or in confined places with the bottom part of the tank being the water connection point.

The Rheem Performance Tankless Electric Water Heater (8.8 GPM) has an overall height of 18.25” (46.4 cm), width of 21.625” (54.9 cm), and depth of 3.5” (8.9 cm). The Rheem Performance Tankless Electric Water Heater (8.8 GPM) weighs 22.7 lb (10.3 kg) and has a maximum flow rate of 8.8 gallons per minute.

Set of dimensioned plan and elevation drawings of the Rheem Performance Tankless Electric Water Heater (8.8 GPM)
The Rheem Performance Tankless Electric Water Heater (8.8 GPM) is mainly for residential use either in the whole house or point-to-point use. Because of their small size, low cost, and maintenance, they can be installed under a sink or cabinets, on the wall, or in confined places.

The Rheem Performance Tankless Electric Water Heater (8.8 GPM) has an overall height of 18.25” (46.4 cm), width of 21.625” (54.9 cm), and depth of 3.5” (8.9 cm). The Rheem Performance Tankless Electric Water Heater (8.8 GPM) weighs 22.7 lb (10.3 kg) and has a maximum flow rate of 8.8 gallons per minute.

Set of dimensioned plan and elevation drawings of the Rheem Performance Tankless Electric Water Heater (8.8 GPM)
Rheem Performance Tankless Electric Water Heater - 8.8 GPM
Height:
18.25” | 46.4 cm
Width:
21.625” | 54.9 cm
Length:
Depth:
3.5” | 8.9 cm
Weight:
22.7 lb | 10.3 kg
Area:

Max GPM: 8.8

EF: .99

Type
Tankless Electric Water Heater
Designer
Rheem

Drawings include:
Rheem Performance Tankless Electric Water Heater (8.8 GPM) front elevation, side, plan

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Rheem Professional Prestige Hybrid Water Heater - 50 Gallon

The Rheem Professional Prestige Hybrid Water Heater (50 Gallon) has features similar to the 65 gallons and 80 gallons but has a low profile, which makes it easily accessible and spots a top-mounted washable air filter. The heater is the smartest, quietest, and is safe for the environment as it emits fewer greenhouse gases. The EcoNet Wi-Fi-connected technology and Rheem EcoNet mobile app give users control over the water heater system, allowing homeowners to customize various settings and even receive alerts via messages.

The Rheem Professional Prestige Hybrid Water Heater (50 Gal) has an overall height of 61” (154.9 cm) and diameter of 22.25” (56.5 cm). The Rheem Professional Prestige Hybrid Water Heater (50 Gal) weighs 218 lb (98.9 kg) and has a tank capacity of 50 gal (189 L).

Collection of elevation and plan drawings of the Rheem Professional Prestige Hybrid Water Heater (50 Gallon) with dimensions
The Rheem Professional Prestige Hybrid Water Heater (50 Gallon) has features similar to the 65 gallons and 80 gallons but has a low profile, which makes it easily accessible and spots a top-mounted washable air filter. The heater is the smartest, quietest, and is safer for the environment.

The Rheem Professional Prestige Hybrid Water Heater (50 Gal) has an overall height of 61” (154.9 cm) and diameter of 22.25” (56.5 cm). The Rheem Professional Prestige Hybrid Water Heater (50 Gal) weighs 218 lb (98.9 kg) and has a tank capacity of 50 gal (189 L).

Collection of elevation and plan drawings of the Rheem Professional Prestige Hybrid Water Heater (50 Gallon) with dimensions
Rheem Professional Prestige Hybrid Water Heater - 50 Gallon
Height:
61” | 154.9 cm
Width:
22.25” | 56.5 cm
Length:
Depth:
22.25” | 56.5 cm
Weight:
218 lb | 98.9 kg
Area:

Tank Capacity: 50 gal | 189 L

UEF: 3.55

Type
Hybrid Tank Water Heater
Designer
Rheem

Drawings include:
Rheem Professional Prestige Hybrid Water Heater (50 Gallon) front elevation, plan

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Rheem Marathon Electric Water Heater - 50 Gallon

The Rheem Marathon Electric Water Heater (50 Gallon) is made with unmatched toughness, strength, and durability, hence reducing the recurring cost of reinstalling a water heater. The heater is insulated with polyurethane foam to prevent rust and corrosion and reduce energy consumption. The heater has a self-cleaning action feature at the bottom of the bowl-shaped tank and inlet tube, thus avoiding the build-up of sediments.

The Rheem Marathon Electric Water Heater (50 Gal) has an overall height of 47.25” (120 cm) and diameter of 28.25” (71.8 cm). The Rheem Marathon Electric Water Heater (50 Gal) weighs 95 lb (43.1 kg) and has a tank capacity of 50 gal (189 L).

Collection of elevation and plan drawings of the Rheem Marathon Electric Water Heater (50 Gal) with height and diameter
The Rheem Marathon Electric Water Heater (50 Gallon) is made with unmatched toughness, strength, and durability, hence reducing the recurring cost of reinstalling a water heater. The heater is insulated with polyurethane foam to prevent rust and corrosion and reduce energy consumption.

The Rheem Marathon Electric Water Heater (50 Gal) has an overall height of 47.25” (120 cm) and diameter of 28.25” (71.8 cm). The Rheem Marathon Electric Water Heater (50 Gal) weighs 95 lb (43.1 kg) and has a tank capacity of 50 gal (189 L).

Collection of elevation and plan drawings of the Rheem Marathon Electric Water Heater (50 Gal) with height and diameter
Rheem Marathon Electric Water Heater - 50 Gallon
Height:
47.25” | 120 cm
Width:
28.25” | 71.8 cm
Length:
Depth:
28.25” | 71.8 cm
Weight:
95 lb | 43.1 kg
Area:

Tank Capacity: 50 gal | 189 L

UEF: .93

Type
Electric Tank Water Heater
Designer
Rheem

Drawings include:
Rheem Marathon Electric Water Heater - 50 Gallon front elevation, plan

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Rheem Performance Platinum Gas Water Heater - 50 Gallon

The Rheem Performance Platinum Gas Water Heater (50 Gallon) is ideal for medium-sized households. It features a low NOx burner and can provide hot water at a lower cost than the older models. A self-diagnostic gas control valve helps improve monitoring and servicing of the heater, and the push-button ignition system provides safety during startups.

The Rheem Performance Platinum Gas Water Heater (50 Gallon) has an overall height of 50.5” (128.3 cm) and diameter of 23.75” (60.3 cm). The Rheem Performance Platinum Gas Water Heater (50 Gallon) weighs 160 lb (72.6 kg) and has a tank capacity of 50 gal (189 L).

Collection of elevation and plan drawings of the Rheem Performance Platinum Gas Water Heater (50 Gallon) with dimensions
The Rheem Performance Platinum Gas Water Heater (50 Gallon) is ideal for medium-sized households. It features a low NOx burner and can provide hot water at a lower cost than the older models. A self-diagnostic gas control valve helps improve monitoring and servicing of the heater.

The Rheem Performance Platinum Gas Water Heater (50 Gallon) has an overall height of 50.5” (128.3 cm) and diameter of 23.75” (60.3 cm). The Rheem Performance Platinum Gas Water Heater (50 Gallon) weighs 160 lb (72.6 kg) and has a tank capacity of 50 gal (189 L).

Collection of elevation and plan drawings of the Rheem Performance Platinum Gas Water Heater (50 Gallon) with dimensions
Rheem Performance Platinum Gas Water Heater - 50 Gallon
Height:
50.5” | 128.3 cm
Width:
23.75” | 60.3 cm
Length:
Depth:
23.75” | 60.3 cm
Weight:
160 lb | 72.6 kg
Area:

Tank Capacity: 50 gal | 189 L

UEF: .67

Type
Gas Tank Water Heater
Designer
Rheem

Drawings include:
Rheem Performance Platinum Gas Water Heater (50 Gallon) front elevation, plan

Details & Downloads

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