Eemax already appears three times elsewhere on this site — as the electric point-of-use pick in our commercial roundup, as one of the brands Home Depot stocks, and as part of Paloma Industries’ family portfolio alongside Rheem itself — but it’s never had its own dedicated review. That’s a real gap: Eemax’s HomeAdvantage II series is a genuine residential electric tankless lineup, sold directly on Amazon, built by the same corporate parent that makes Rheem’s tankless units.
Our top picks at a glance
| Model | Best for | Power | Circuit | Price |
|---|---|---|---|---|
| HA008240 | Single sink / point-of-use | 8 kW / 240V | 33A double-pole | ~$232.69 |
| HA018240 | Small home / heavy point-of-use | 18 kW / 240V | 75A double-pole | ~$399.99 |
| HA036240 | Larger whole-house | 36 kW / 240V | 4x 40A double-pole | ~$866.61 |
Prices per current wholesaler listings: HA008240 $232.69 at AF Supply, HA018240 $399.99 at SupplyHouse (Lowe's lists the same model at $449.00), HA036240 $866.61 at SupplyHouse (Ferguson lists it at $1,027.09). Amazon pricing fluctuates independently of these figures — check the retailer link before buying.
By the numbers
- 2.7 GPM at a 35°F rise — the HA018240’s real usable output per Home Depot’s own detailed spec listing, despite other retailer pages headlining an unqualified “7 GPM” figure for the same unit. Flow rate on any electric tankless unit drops sharply as incoming water gets colder, so the unqualified headline number overstates what you’ll actually get in a winter groundwater scenario.
- 152 amps across four separate breakers — the HA036240’s total electrical draw, confirmed via the manufacturer’s own installation documentation and multiple wholesaler spec sheets — a genuine four-circuit project, not a single high-amp breaker.
- 1988 — the year Paloma Industries acquired Rheem Manufacturing, per our existing Paloma brand review; Eemax has been part of that same corporate family ever since, making it a Rheem sibling rather than an outside competitor.
1. Eemax HA008240 — Best Point-of-Use
Eemax HA008240 HomeAdvantage II Electric Tankless Water Heater
- The smallest model in the HomeAdvantage II line, sized for a single sink or a detached fixture rather than whole-house demand.
- Still requires a dedicated 240V double-pole breaker (33A) — unlike a 120V plug-in point-of-use unit, this is a real electrical install, not a plug-and-play swap.
- AF Supply currently lists it at $232.69; pair it against our best point-of-use water heater roundup if you're weighing it against 120V alternatives that skip the breaker install entirely.
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An 8 kW unit like the HA008240 is the right size when the problem is a single far-flung fixture — a detached sink, a bar, a workshop — not a whole house. Because it still needs a dedicated 240V circuit rather than a standard outlet, budget for an electrician’s time even on the smallest HomeAdvantage II model; that’s the real tradeoff against a 120V point-of-use unit from a brand like Atmor or Bosch.
2. Eemax HA018240 — Best for Small Homes
Eemax HA018240 HomeAdvantage II Electric Tankless Water Heater
- Home Depot's own listing title specs it at 2.7 GPM at a 35°F temperature rise — the realistic winter figure, well below the unqualified "7 GPM" some other listings headline for the same unit.
- Draws 75 amps on a single 240V double-pole circuit, a meaningfully smaller electrical project than the four-circuit 36 kW model below.
- SupplyHouse currently prices it at $399.99; Lowe's lists the same model at $449.00, so it's worth a quick price check across retailers before ordering.
The HA018240 is where HomeAdvantage II starts making sense for genuine small-home use rather than a single fixture. The GPM gap between its headline spec and its real 35°F-rise number is the same climate-dependent story every electric tankless brand on this site runs into — see our tankless water heater sizing guide for how to size flow rate against your actual incoming water temperature rather than a marketing number.
3. Eemax HA036240 — Best for Larger Homes
Eemax HA036240 HomeAdvantage II Electric Tankless Water Heater
- Eemax's largest residential HomeAdvantage II model, rated up to 8 GPM of maximum flow per Build.com's listing.
- Draws 152 amps total, split across four separate double-pole 40A breakers with four runs of 8 AWG wire — a genuine multi-circuit electrical project most homes will need an electrician to quote before ordering.
- SupplyHouse currently prices it at $866.61; Ferguson lists the same model at $1,027.09, a meaningful spread worth checking before you buy.
The HA036240’s four-breaker install is the real cost most buyers underestimate on paper — a 152A draw isn’t a single panel slot, it’s a genuine rewiring project even before the unit itself ships. For a side-by-side against Eemax’s gas-fired cousins in the same Paloma family, see our best Rheem tankless water heater review, or our full best electric tankless water heater roundup for how it stacks up against EcoSmart and Atmor at the same output tier.
How to choose an Eemax tankless water heater
- One sink or a detached fixture: the HA008240 — still needs a dedicated 240V circuit, but the smallest breaker requirement in the line.
- Small home or heavy point-of-use demand: the HA018240 — check the real 35°F-rise GPM figure, not just the headline flow-rate number, before assuming it covers your household.
- Larger home, genuine whole-house draw: the HA036240 — budget for a four-circuit electrical install, not just the unit price.
- Confirming the warranty: don’t take either the “lifetime” or “1 year” claim at face value — call Eemax or your retailer to confirm the term that actually applies to your model and purchase channel.
The bottom line
Eemax earns a real spot in the tankless conversation on brand legitimacy alone — it’s Rheem’s own sister brand under parent company Paloma Industries, not an unrelated budget import, and its HomeAdvantage II line sells through Amazon, SupplyHouse, Ferguson, Lowe’s, and Home Depot alike. The HA008240 covers a single point-of-use fixture, the HA018240 is the practical small-home pick once you size it against its real 35°F-rise flow rate rather than its headline GPM number, and the HA036240 is the whole-house tier for buyers ready to budget a four-circuit electrical install. The one thing worth doing before you buy any of them: confirm the actual warranty term directly, since retailer listings disagree on whether coverage runs one year or a lifetime. For the full brand field, see our best tankless water heater guide, or our best commercial tankless water heater review for where Eemax’s point-of-use commercial model fits a business setting instead.