Bosch · Updated July 2026

Bosch Greentherm T9900i SE 199: price & specs

Name: Bosch Greentherm T9900i SE 199
Brand: Bosch
Price: 3583.27 USD
Availability: InStock

The Bosch Greentherm T9900i SE 199 costs $3583.27, the most expensive tankless water heaters (median $1295.62). It earns a Bronze Deskmark — 36/100 pay-blind standing, #6 of 8 in class.

Verified Jul 11, 2026 · figures linked to their source in the table below

See Bosch Greentherm T9900i SE 199 on Amazon Recorded 2026-07-11 — live price may differ. As an Amazon Associate we earn from qualifying purchases.

Bosch Greentherm T9900i SE 199. Every price and spec below is linked to its source and dated — no guesses.

Source: bosch-homecomfort.com verified 2026-07-11 ✓ corroborated verify in ledger

Bosch Greentherm T9900i SE 199 — Bosch — Image: bosch-homecomfort.com (© Bosch)

Is the Bosch Greentherm T9900i SE 199 a good buy?

At $3583, the Bosch Greentherm T9900i SE 199 is the most expensive of the 7 tankless water heaters we track, where the median is $1295.62. On the spec sheet, its max flow rate gpm of 11.2 is the highest of the 8, its heat exchanger warranty yrs of 15 is the highest of the 7, and its weight of 85 lb is the highest of the 6.

Specifications

Price (US)	$3583.27 Craft Supply (thecraftsupply.com) lists the exact model — "Bosch Greentherm T9900i SE 199 NG/LP Tankless Water Heater With WiFi", SKU 7736503732 — at $3,583.27 (verbatim on the fetched page). No manufacturer MSRP was published on any fetchable page, and retailer street prices vary widely (e.g. Anderson-Bolds $2,499.00), so the exact-model retailer figure is used.
Brand	Bosch
Released	—
Fuel type	natural-gas
Max flow rate gpm	11.2
Max btu per hour	199000
Power input (kW)	—
Uniform energy factor	—
Condensing type	condensing
Min activation flow gpm	0.45
Vent type	pvc
Max temp f	140
Heat exchanger warranty yrs	15
Wi-Fi enabled	Yes
Weight (lb)	85

Source: bosch-homecomfort.com (verified 2026-07-11) · corroborated by thecraftsupply.com. The official Bosch Home Comfort Greentherm 9000 Series page confirms the "premium Greentherm 9900i SE" as the model that "comes standard with a glass front and integrated Wi-Fi control," uses "ultra efficient condensing technology," and carries an "industry-leading 15-year warranty on the heat exchanger and a full 5-year limited warranty on parts." Craft Supply's product page for the exact model (title "Bosch Greentherm T9900i SE 199 ... With WiFi", SKU/MPN 7736503732 — the same part number Home Depot lists for the T9900i SE 199, distinguishing it from the non-Wi-Fi T9900 SE 199) supplies the verbatim spec table: Natural Gas/Liquid Propane, 11.2 GPM at 35°F rise, 199,000 BTU maximum input, 0.45 GPM activation flow, 100–140°F temperature range, PVC condensing venting, 85 lb dry weight, priced at $3,583.27. uniformEnergyFactor is null because the manufacturer states only a series-level "UEF up to 0.95" while retailer listings variously cite 0.96 UEF or ".99 Energy Factor," so no unambiguous DOE UEF for this exact model could be sourced verbatim.

Is the Bosch Greentherm T9900i SE 199 worth it vs cheaper tankless water heaters?

Bosch Greentherm T9900i SE 199 against its closest cheaper and pricier tankless water heaters on the specs that matter — every value sourced. See all 7 ranked →

Product	Price	Fuel type	Max flow rate gpm	Max btu per hour	Condensing type	Min activation flow gpm
Bosch Greentherm T9900i SE 199 this	$3583.27	natural-gas	11.2	199000	condensing	0.45
Navien NPE-240A2	$2099	natural-gas	11.2	199900	condensing	0.5

Frequently asked questions

How much does the Bosch Greentherm T9900i SE 199 cost?

The Bosch Greentherm T9900i SE 199 has a US price of $3583.27 (Craft Supply (thecraftsupply.com) lists the exact model — "Bosch Greentherm T9900i SE 199 NG/LP Tankless Water Heater With WiFi", SKU 7736503732 — at $3,583.27 (verbatim on the fetched page). No manufacturer MSRP was published on any fetchable page, and retailer street prices vary widely (e.g. Anderson-Bolds $2,499.00), so the exact-model retailer figure is used.), as of 2026-07-11.

How does the Bosch Greentherm T9900i SE 199 compare on price?

At $3583, the Bosch Greentherm T9900i SE 199 is the most expensive of the 7 tankless water heaters we track, where the median is $1295.62.

What are the Bosch Greentherm T9900i SE 199's key specs?

Bosch Greentherm T9900i SE 199 (Bosch): fuelType natural-gas, maxFlowRateGpm 11.2, maxBtuPerHour 199000, condensingType condensing, minActivationFlowGpm 0.45. Full sourced spec sheet verified 2026-07-11.