Best Water Heater Brands for Colorado Homes: Bradford White, Rheem, and AO Smith Compared

Why Brand Matters (Especially in Colorado)

Denver metro water has elevated mineral content — calcium and magnesium primarily — that creates hard water scale buildup inside water heaters. This scale settles on heating elements in electric units, coats the bottom of gas tank burner chambers, and clogs heat exchanger components in tankless units. Water heaters with better anode rod systems, thicker glass lining, and more robust materials last significantly longer in Colorado conditions than cheaper units.

Additionally, because water heaters have warranty claims and replacement parts tied to the manufacturer, choosing a brand with strong warranty support and locally available parts matters for total cost of ownership — not just the purchase price.

Bradford White: The Professional's Choice

Bradford White is the brand most consistently recommended by independent plumbers across the country, and for good reason. Unlike Rheem and AO Smith, Bradford White sells exclusively through licensed plumbing and HVAC contractors — you can't buy one at a big box store. This distribution model means Bradford White units are almost always installed by professionals, which significantly reduces installation-related problems.

What sets Bradford White apart:

• Vitraglas lining — A proprietary glass lining on the tank interior that's formulated to resist hard water scale buildup better than standard glass linings.
• MagneSOde self-cleaning system — A self-cleaning dip tube that stirs incoming cold water to keep sediment suspended rather than letting it settle at the bottom of the tank. Particularly beneficial in Colorado's hard water conditions.
• Hydrojet total performance system — Reduces sediment buildup and extends tank life.
• Strong warranty coverage — Most residential Bradford White units come with a 6-year warranty on the tank and parts, with commercial-grade options at 10 years.

Best for: Homeowners who want the most durable long-term option and are working with a licensed plumber.

Rheem: Strong Availability, Proven Reliability

Rheem is one of the most widely recognized water heater brands in the country, with strong distribution through both contractors and retail channels (where they're sometimes sold as Richmond). Rheem makes solid, reliable water heaters with competitive warranties and excellent parts availability nationwide.

What makes Rheem a strong choice:

• Broad product line covering standard gas and electric tanks, tankless units, and heat pump water heaters
• Strong first-hour delivery ratings across their tank lineup
• EcoNet smart connectivity on higher-end models
• Competitive warranties (6–12 years depending on model tier)
• Widely available replacement parts at local supply houses

Important distinction: Rheem's contractor-grade units are meaningfully better than their retail versions sold at Home Depot. If you're buying Rheem through a plumber, you're getting the contractor line — not the retail version.

Best for: Homeowners who want a reliable, well-supported brand with strong warranty coverage and easy parts availability.

AO Smith: Innovation and Efficiency Leadership

AO Smith is known for pushing the technology envelope, particularly with heat pump water heaters and high-efficiency tankless units. Their Voltex hybrid electric heat pump water heater is among the most efficient residential units available, and their tankless lineup is competitive with Navien and Rinnai on performance.

What distinguishes AO Smith:

• Industry-leading heat pump water heater efficiency ratings
• Strong tankless lineup for whole-home hot water demand
• iCOMM communication technology on connected models
• Solid warranty coverage (6–12 years depending on series)
• Sold through contractors and retail (where they appear as State and American Water Heaters brands)

Best for: Homeowners interested in heat pump water heaters or high-efficiency tankless systems where energy savings are the priority.

What About Big Box Store Brands?

Brands sold at Home Depot and Lowe's — including some Rheem, AO Smith, and their house brands — are generally manufactured to lower specifications than contractor-grade equivalents. Anode rods are often smaller, tank linings thinner, and burner assemblies lighter-duty. The warranty terms are similar on paper, but the actual failure rates and component quality differ.

If a plumber is supplying the unit, you're almost certainly getting contractor-grade equipment — which is one of the reasons letting the plumber supply the heater typically works out better than buying your own unit at a hardware store.

The Bottom Line for Denver Homeowners

All three brands — Bradford White, Rheem, and AO Smith — will serve you well when installed correctly by a licensed plumber. The differences in quality and longevity become most apparent in Colorado's hard water conditions over a 10+ year lifespan. Bradford White's self-cleaning and hard water resistance features give it an edge for standard tank installations. Rheem offers excellent reliability and widespread support. AO Smith leads on efficiency-focused and heat pump applications.

Ask your plumber which brand they prefer and why — a good plumber will have a clear answer based on their experience, not just what happened to show up on the delivery truck.

Frequently Asked Questions

What is the most reliable water heater brand?

Bradford White is the most consistently recommended brand among professional plumbers. Sold exclusively through licensed contractors, their units are paired with professional installation and offer features specifically beneficial in Colorado's hard water conditions.

Which water heater brand does Glaze Plumbing install?

We install Bradford White as our primary brand for their professional-only distribution, hard water performance features, and robust warranties. We also install Rheem and other brands based on the application.

Are big box store water heaters as good as contractor-grade units?

Generally no. Retail versions of name-brand water heaters are often manufactured to lower specifications than contractor-grade equivalents — lighter anode rods, thinner linings, and lighter burner components. Working with a licensed plumber means you get contractor-grade equipment.