Rheem offers 8 40 gallon water heaters models in the lineup we track. This page is the Rheem-specific cut of the broader 40-Gallon Water Heaters water heaters category — same product class, narrowed to the Rheem catalog only.
<p>If you've been researching water heaters, Rheem has almost certainly come up. Their catalog spans the full price tier from value picks to flagship models, and their warranty terms are among the most generous in the category. This page is built to help you navigate the Rheem water heaters lineup specifically — which model belongs in which use case, where Rheem wins against its closest competitors, and where you should consider an alternative.</p> <h2 id="brand-overview">About Rheem in water heaters</h2> <p>Rheem's position in the water heaters category is reinforced by three structural adv...
For the complete Rheem lineup across all sub-types and capacities, see the Rheem Water Heaters hub.
If you're cross-shopping 40 gallon water heaters beyond Rheem, the following brands also ship in this category:
The 40-gallon water heater is the volume size for 2–3 person households — second only to 50-gallon in residential install volume. The 40G saves $30–$80 upfront vs the 50G and fits the same standard 22"-diameter footprint with slightly less height. For 1-bathroom homes and smaller households, 40G is often the right sizing.
Explore Rheem from other angles: