Marathon (Rheem) Water Heaters Review 2026
Best lifetime tank warranty
UEF Range
0.9–0.95
Types
1
Price Range
$$$
Tank Warranty
Lifetime
Origin
USA
Why Marathon (Rheem)?
Best lifetime tank warranty. Trusted by Nassau County homeowners since 1925.
Part of Rheem Manufacturing
Our Review Process
Our reviews are fact-checked by NATE-certified HVAC professionals with 10+ years of field experience.
Marathon (Rheem) Aater heater Installation & Service Across Nassau County & Western Suffolk
Home+ Air & Heat installs and services Marathon (Rheem) water heater throughout Nassau County and Western Suffolk — from Garden City and Jericho to Massapequa and Huntington. We are a premium HVAC contractor: our pricing reflects white-glove installation standards, not a race to the bottom.
Every Marathon (Rheem) system we install is sized with a live Manual J load calculation, commissioned with digital airflow verification, and backed by a 1-year labor warranty. We do not compete on sticker price. We compete on installation quality, long-term reliability, and the peace of mind that your unit was put in by NATE-certified technicians who treat your home like their own.
Expert Review: Marathon (Rheem)
First-hand experience from our Nassau County water heater installation team.
Marathon (Rheem) Water Heaters: An Expert Review by Homets Air & Heat
Our Field Experience in Nassau County
Here at Homets Air & Heat, we’ve been installing water heaters across Jericho and wider Nassau County for years, and Marathon (Rheem) units are a product we know well. We've seen firsthand how these premium electric tank water heaters perform in the varied homes across Long Island. Our technicians appreciate their robust build and the straightforward installation process, despite their heavier weight compared to some other brands. The most common feedback we get from homeowners after installation is their satisfaction with consistent hot water and, over time, the peace of mind knowing they won't be dealing with tank corrosion.
Handling Long Island's Hard Water and Coastal Conditions
Long Island’s water, particularly in Nassau County, is known for being hard, which can be a significant challenge for conventional water heaters. This is where Marathon truly shines. Their unique polybutene tank construction means there
Blake Ruwali
NATE-Certified HVAC Technician
Pros
- Lifetime tank warranty — never rusts
- Polybutene tank construction
- Excellent insulation
- No anode rod maintenance
Cons
- Electric only
- Higher upfront cost
- Heavy unit
- No gas models
Marathon (Rheem) Key Specifications
UEF Range
0.9–0.95
Price (Installed)
$1,500–$3,000
Tank Warranty
Lifetime
Types Available
1
Marathon (Rheem) Water Heater Models We Install
Detailed specs and pricing for Marathon (Rheem) models available for Nassau County installation.
Marathon 85-Gallon Lifetime Electric Tank
Installed Price
$2,200–$3,200
The only residential water heater with a lifetime tank warranty — never rusts.
UEF
0.93
1st Hr Rating
102 gal
Capacity
85 gal
Pros
- Lifetime tank warranty
- No anode rod needed
- Will not rust, corrode, or leak
Cons
- Electric only
- Very large footprint
- Heavy (150+ lbs dry)
Marathon 50-Gallon Lifetime Electric Tank
Installed Price
$1,800–$2,600
Standard-size lifetime-warranted electric tank for typical households.
UEF
0.95
1st Hr Rating
67 gal
Capacity
50 gal
Pros
- Same lifetime warranty
- More manageable size
- High efficiency
Cons
- Electric only
- Limited availability
- Premium pricing
Marathon (Rheem) Warranty Coverage
Tank
Lifetime
Parts
Lifetime
Labor
N/A
Warranty terms require professional installation and product registration. We handle all warranty registration for our customers.
Marathon (Rheem) Cost & Pricing
Price Range (Installed)
$1,500–$3,000
Price Tier
$$$
Tier
Premium
Prices reflect typical Nassau County installations including labor, materials, and permits. Heat pump water heaters may qualify for up to $2,000 in federal tax credits.
Marathon (Rheem) Brand History
Founded in 1925
Marathon (Rheem) has been manufacturing water heaters for over 101 years. Proudly American-made.
Part of Rheem Manufacturing
Rheem Manufacturing also manufactures Rheem, Ruud, Richmond — sharing engineering and manufacturing platforms.
How Marathon (Rheem) Compares
Who Should Choose Marathon (Rheem)?
Large Families
Marathon (Rheem) tankless units provide unlimited hot water for households of 4+.
Small Homes
Marathon (Rheem)'s smaller tank models fit tight utility closets in older Long Island homes.
Energy Savings
Marathon (Rheem)'s high-efficiency models help cut energy bills with UEF ratings up to 0.95.
Marathon (Rheem) FAQs
Ready for a Marathon (Rheem) Water Heater?
Get a free, no-pressure quote from our certified technicians who install Marathon (Rheem) water heaters regularly.
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Marathon (Rheem) Heater Types
🔥 Water Heater Buying Guide
Tank vs tankless vs heat pump — find the right water heater for your Nassau County home.
Read the Guide →About This Review
Amy Milani
Writer
Blake Ruwali
NATE-Certified Reviewer
Updated:
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