Find and compare top tankless water heater heating elements to restore speed and temperature consistency. This guide highlights replacements that fit popular models from EcoSmart, Eemax, Rheem, Richmond, and iHeat/Drakken. Best for homeowners needing a cost-saving part rather than a full heater replacement, or pros replacing aging elements in multiple brands. The table below summarizes five strong options to consider.
| Product | Best For | Key Benefit |
|---|---|---|
| Upgrade HE 90240 Heating Element (2-Pack) by ATEEfaee | EcoSmart Eco 18/24/27/36 and similar models | Screw-in installation; includes O-Ring and screw |
| 2PACK HE 55220 Water Heater Element Replacement by Lisnhlin | Eco Smart ECO POU 6/8/11 and similar | Compatible with many 5.5kW/220V units; screw-in, keeps heat steady |
| HE 90240 Heating Element Upgrade (3 Pack) by Lisnhlin | EcoSmart Eco 18/24/27/36 and more | 3-pack for bulk replacement; leak-proof gasket |
| HE 90240 Heating Element (3 Pack) by Mhrxusd | EcoSmart ECO 18/27/36 and variants | 9KW 240V; screw-in design; broad compatibility |
| HE 90240 Tankless Heating Element For EcoSmart Eco 18/24/27/36 by Kscjdg | EcoSmart and iHeat/Drakken lines | 9KW 240V with new rubber ring; clear compatibility notes |
Upgrade HE 90240 Heating Element — ATEEfaee
Reference: 90240 compatible with EcoSmart ECO 18/24/27/36, Eemax, Rheem, Richmond, and more. Features screw-in installation with included O-Ring and screw. Best for buyers replacing a failed element to avoid full heater replacement, saving on repair costs. Caution: check exact model compatibility before purchase to ensure fit with your unit.
2Pack HE 55220 For Ecosmart ECO POU Units
Best for models ECO POU 6, ECO 8, ECO 11, and compatible with Eemax and Rheem variants. Includes 5500W (5.5kW) 220V or 6kW 240V options with new O-Ring and screw. Choose this if you need a bulk replacement option to minimize downtime. Limitation: verify exact part number 55220 for your heater to avoid incompatibility.
HE 90240 Heating Element Upgrade (3 Pack) — Lisnhlin
Best for replacing EcoSmart ECO 18/24/27/36 elements with a 9KW/18KW/27KW/36KW 240V rating. This 3-pack provides multiple replacements and includes a rubber gasket. Better for users who own multiple units or want stock for future replacements. Caution: ensure your unit’s required KW match the element rating to avoid under/overheating.
HE 90240 3 Pack Replacement — Mhrxusd
Best for EcoSmart Eco 18/24/27/36 and iHeat/Drakken lines, including Rheem and Richmond variants. This 3-pack features 9KW 240V screw-in elements with a leak-proof O-ring. Choose this if you want a ready-to-install set for fast maintenance. Limitation: verify compatibility with your specific model family to ensure a seamless fit.
Upgrade HE 90240 3 Pack — ATEEfaee
Best for EcoSmart ECO 18/24/27/36 and compatible brands, this 3-pack includes 9KW/18KW/27KW/36KW ratings at 240V. Screwed-in design with new O-Ring and screw makes maintenance straightforward. Caution: ensure the unit’s chamber count matches the element’s configuration to avoid fit issues.
Buying Guide
What to consider when choosing a tankless heater element
Compatibility: Verify the exact model, voltage, and KW rating (5.5kW/6kW or 9kW/18kW/27kW/36kW) to avoid mismatches. Look for models labeled as compatible with EcoSmart, Eemax, Rheem, Richmond, or iHeat/Drakken lines.
Installation and maintenance
Most elements are screw-in and come with an O-Ring and screw. A leak-proof gasket improves longevity. If you’re replacing more than one unit, consider a multi-pack to minimize downtime and future replacement costs.
Durability and warranty considerations
Choose elements with robust gaskets and reputable brand compatibility. While warranties vary, a direct replacement element is usually more cost-effective than replacing an entire heater when the unit is otherwise sound.
Cost and downtime
Bulk packs can reduce per-unit cost and downtime. Consider your service schedule and stock needs when deciding between single-unit replacements and multi-packs.
Safety and compatibility checks
Ensure the element’s correct voltage (220V vs 240V) and power rating. Mismatches can cause insufficient heating or safety concerns. Always power off the heater before replacement and inspect O-Rings for proper sealing.
FAQ
- What is a tankless water heater heating element? It is the heating coil or cartridge inside the unit that heats the water as it flows through the exchanger.
- How do I know which element fits my heater? Check the model number and KW rating printed on your current element or consult your heater’s manual for the compatible replacement part numbers (such as 90240 or 55220).
- Can I replace just one element or should I replace multiple? If only one unit shows poor heating, you can replace that element. In multi-unit systems or if wear is widespread, replacing multiple elements can be prudent.
- Is a 9KW element suitable for all EcoSmart models? No. Compatibility depends on the model and chamber configuration. Verify compatibility with your specific EcoSmart model before purchase.
- Do these elements require professional installation? They can be installed by a capable DIYer, but if you’re unsure about electrical connections or seals, consider professional service.
- Will replacing the element restore hot water immediately? Replacement often resolves lack of heating or slow heating, but ensure there are no downstream issues such as water flow restrictions or mineral buildup.