Quick Answer: Bradford White’s Infiniti tankless lineup — K, L, GR, and GS Series — are all 199,000 BTU condensing gas units, but they split on flow rate, efficiency, and recirculation. The Infiniti GR Series (RTG-R-199-N1) is the best overall pick: 9.7 GPM peak flow, a built-in recirculation pump, and 0.95 UEF at $1,704.13 equipment-only (SupplyHouse.com, checked August 2026). The K Series trades flow for efficiency — 8.7 GPM but the lineup’s highest 0.96 UEF — at $1,927.76. The one fact that changes how you shop for any of them: Bradford White sells almost exclusively through plumbing wholesalers, not Home Depot or Lowes, so budget for a contractor relationship, not a big-box pickup.
Most tankless brand roundups treat Bradford White like any other retail name and rank its specs against Rheem or Rinnai without mentioning how you actually buy one. That’s the detail this guide leads with — Bradford White is a trade-channel brand first, and its four Infiniti models (K, L, GR, GS) differ enough on flow, efficiency, and recirculation that picking the wrong one for your fixture count is an easy, avoidable mistake.
Our top picks at a glance
| Model | Best for | BTU | Peak flow | UEF | Recirc pump | Price |
|---|---|---|---|---|---|---|
| Infiniti GR (RTG-R-199-N1) | Best overall whole-home | 199,000 | 9.7 GPM | 0.95 | Built-in | $1,704.13 |
| Infiniti K (RTG-K-199-N1) | Best efficiency | 199,000 | 8.7 GPM | 0.96 | None | $1,927.76 |
| Infiniti L (RTG-L-199-N1) | Best for hard water | 199,000 | 8.7 GPM | 0.95-0.96 | Optional (wired) | $1,919.15 |
| Infiniti GS (RTG-S-199-N1) | Best value high-flow | 199,000 | 9.7 GPM | 0.95 | Not confirmed | $1,475.00 |
Prices are equipment-only, SupplyHouse.com listings checked August 9, 2026 — installed totals typically run $1,000-$2,000 higher once labor, venting, and gas-line work are added, per the ranges in our tankless water heater cost guide.
The distribution gap nobody flags
Search for “Bradford White tankless water heater” and most results jump straight to specs. What they skip: you can’t walk into Home Depot or Lowes and buy one off the shelf. Bradford White runs a trade-first distribution model — its Infiniti tankless units sell through plumbing wholesalers (SupplyHouse, Ferguson-network distributors, regional supply houses like APR Supply and Masters Supply) rather than big-box retail. Every other brand in our lineup — Rheem, Rinnai, Navien, EcoSmart, even the discontinued-stock Bosch line — is on a Home Depot or Lowes shelf today. Bradford White is not.
That distinction matters for two reasons. First, it’s why Bradford White is the brand plumbers reach for and the brand most homeowners have never heard of — a trust signal in the trade, an information gap for DIY shoppers. Second, it shapes reliability expectations: a unit that ships through a professional channel and is typically installed and maintained by a licensed contractor tends to perform closer to its rated lifespan than the same hardware installed and neglected by a first-time DIYer.
By the numbers
- 15-year limited residential heat-exchanger warranty on the Infiniti tankless series, matching the top-tier warranty length Rinnai and Navien offer on their flagship condensing units. — Bradford White submittal documentation
- 0.96 UEF on the Infiniti K Series, the highest efficiency rating across Bradford White’s four tankless models and competitive with the best condensing units from any brand we’ve reviewed. — Bradford White / SupplyHouse.com specifications
- 9.7 GPM peak flow on the GR and GS Series — a full GPM higher than the K and L Series’ 8.7 GPM, enough headroom to run two showers plus a dishwasher simultaneously in most climates. — Bradford White Infiniti selection guide
1. Infiniti GR Series (RTG-R-199-N1) — Best Overall
Bradford White Infiniti GR Series (RTG-R-199-N1)
- The only model in the lineup confirmed to ship with a built-in recirculation pump — a dedicated recirc connection cuts the wait for hot water at distant fixtures without needing an internal buffer tank.
- 9.7 GPM peak flow, the highest in the Infiniti range, tied with the GS Series.
- Copper-primary, 316L-stainless-secondary heat exchanger, the same scale-resistant architecture as the L Series.
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If a family bathroom or kitchen sits far from the mechanical room, this is the model that solves it out of the box. Compare it against our best tankless water heater recirculating pump guide before adding an aftermarket pump to a different brand — the GR Series skips that compatibility question entirely.
2. Infiniti K Series (RTG-K-199-N1) — Best Efficiency
Bradford White Infiniti K Series (RTG-K-199-N1)
- Highest UEF in the Bradford White lineup at 0.96 — a meaningful gas-bill difference over a 15-20 year service life.
- STEADISET technology holds outlet temperature steady and virtually eliminates the "cold water sandwich" without an internal buffer tank, unlike some competing brands' buffer-tank workarounds.
- No built-in recirculation pump — the tradeoff for the efficiency lead, and the reason it costs more than the higher-flow GR Series despite lower peak GPM.
If your household runs one shower at a time rather than two simultaneously, the K Series’ 8.7 GPM ceiling is rarely a real limitation, and the 0.96 UEF pays back over the unit’s life. Check our sizing guide to confirm 8.7 GPM covers your fixture count before choosing efficiency over flow.
3. Infiniti L Series (RTG-L-199-N1) — Best for Hard Water
Bradford White Infiniti L Series (RTG-L-199-N1)
- Copper-primary, 316L-stainless-secondary heat exchanger paired with Scale Reduction Technology (SRT), Bradford White's answer to hard-water mineral buildup.
- Built-in freeze protection and a pressure relief valve at an integral port — fewer separate parts to source and install.
- Wired for an optional external recirculation pump kit rather than shipping with one built in, unlike the GR Series.
Hard-water regions are exactly where tankless heat exchangers scale fastest — see our descaling guide for why annual maintenance matters regardless of which model you buy. SRT reduces but doesn’t eliminate that maintenance requirement.
4. Infiniti GS Series (RTG-S-199-N1) — Best Value High-Flow
Bradford White Infiniti GS Series (RTG-S-199-N1)
- Matches the GR Series' 9.7 GPM peak flow at roughly $230 less, the cheapest of the four Infiniti models.
- Product listings don't confirm a built-in recirculation pump the way the GR Series' spec sheet does — treat this as the flow-focused, budget-focused pick rather than the recirculation pick.
- Same 0.95 UEF and ENERGY STAR qualification as the GR Series.
For a straightforward whole-home swap where high flow matters more than recirculation or peak efficiency, the GS Series is the value pick of the lineup — same peak GPM as the GR Series for less money, provided you don’t need the recirc pump.
What the mixed reviews actually mean
Bradford White earns real trust from licensed plumbers — contractors report 20-to-30-year service life on tankless units under normal water conditions with annual maintenance. But consumer complaint sites paint a rockier picture: a low average rating on aggregator sites, with recirculation-pump failures and slow warranty response among the recurring tankless-specific complaints. That split isn’t necessarily a contradiction — it likely tracks who installed and maintains the unit. A trade-channel brand installed by a licensed pro and descaled on schedule behaves differently than the same hardware bought online and self-installed without the maintenance routine our maintenance guide covers. Budget for professional installation and annual descaling if you go with Bradford White, and the odds shift back in your favor.
How to choose
- If you want the best all-around whole-home unit: the Infiniti GR Series — highest flow tied with GS, plus the only confirmed built-in recirc pump.
- If gas-bill efficiency is the priority and you don’t need a recirc pump: the Infiniti K Series — 0.96 UEF, the lineup’s best.
- If you’re in a hard-water region: the Infiniti L Series — SRT scale resistance plus built-in freeze protection.
- If budget matters most and you still want 9.7 GPM: the Infiniti GS Series — same peak flow as the GR Series for less.
- If you want a brand you can buy at a big-box store and self-install: skip Bradford White and see our best tankless water heater roundup instead — Rheem, Rinnai, and Navien are all retail-shelf brands. Our best A.O. Smith tankless water heater guide is another option in that category — a big-name tank-heater brand whose tankless line, gas and electric, is genuinely stocked on Lowe’s and Amazon.
- If you want another wholesale-only brand, this one badge-shared with a retail name: see our best State tankless water heater guide — A.O. Smith’s own trade-channel brand, same GTS platform sold through the same wholesalers Bradford White uses.
The bottom line
Bradford White’s Infiniti tankless lineup is genuinely competitive on paper — 0.95-0.96 UEF, a 15-year heat-exchanger warranty, and up to 9.7 GPM peak flow put it in the same tier as Rinnai and Navien. The Infiniti GR Series ($1,704.13) is the best overall pick for most whole-home installs, and the K Series ($1,927.76) is the one to choose if efficiency outranks flow rate. What separates Bradford White from every other brand on this site is distribution: it’s a trade-channel product built around a licensed-installer relationship, not a Home Depot pickup, and that shapes both the buying process and the reliability you should expect. Budget for a professional install and the annual descaling our maintenance guide covers, and the mixed consumer reviews stop looking like a red flag and start looking like a maintenance gap.
Check the Bradford White Infiniti GR Series price on Amazon →