Takagi T-KJr2-IN-NG
The Takagi T-KJr2-IN-NG is the smallest, most affordable unit in Takagi's lineup — a compact 140,000 BTU/h non-condensing indoor gas tankless rated up to 6.6 GPM with a 0.81 UEF. It's built around a commercial-grade copper heat exchanger for good heat transfer and corrosion resistance, includes freeze protection, an overheat cutoff, inlet/outlet thermistors, and a flame sensor, and direct-vents through a 4-inch stainless pipe out a side wall or the roof. Takagi positions it for light residential use — a small apartment or home — and radiant-heating applications, where it can typically run a shower and a sink at once.
Realistically it's a one-to-two-fixture heater: it delivers its 6.6 GPM only at a small rise, about 3.9 GPM at a 60 °F rise, and closer to 3.2 GPM in deep winter. As a non-condensing unit it's inexpensive and simple, with no condensate drain, but less efficient than a condensing model. Its ~4.3-star rating reflects solid satisfaction with reliability and value. The important caveat, shared across the brand: Takagi was discontinued as of December 31, 2025 — units still ship from stock, warranties (10-year heat exchanger) are honored, and parts remain for now, but long-term support will wind down. For a small home wanting dependable, budget-friendly gas hot water today, it's a proven pick with that future caveat in mind.
Key Features
Best Use Cases
Our Verdict
Takagi's smallest and cheapest tankless — a dependable one-to-two-fixture gas unit for a small home, apartment, or radiant loop. Non-condensing and modest, but proven and well-protected. The catch is the brand's end-of-2025 discontinuation: fine on remaining stock with warranties honored, but factor in tapering long-term parts support.
What owners report
Themes summarized from verified-purchase reviews across major retailers (4.3★ average, 156 ratings). These are aggregated owner opinions — not our own bench testing.
Owners value its dependable operation and the commercial-grade copper heat exchanger in a compact, easy-to-place unit.
Reviewers are clear it suits one to two fixtures — a shower and a sink — rather than whole-home demand.
As Takagi's entry model, it's frequently praised for delivering the brand's reliability at a budget price.
Takagi's end-of-2025 discontinuation means warranties are honored and parts remain for now, but long-term support will taper.
Takagi T-KJr2-IN-NG FAQ
How many fixtures can the T-KJr2 run?+
Realistically one to two — typically a shower and a sink together. It's Takagi's smallest unit, best for light residential and radiant use, not whole-home demand.
Is Takagi still supported?+
The brand was discontinued as of December 31, 2025. Units still ship from stock, the 10-year heat-exchanger warranty is honored, and parts remain available while supplies last — but plan for support to wind down.
Is it condensing?+
No — it's non-condensing at 0.81 UEF. Simpler and cheaper with no condensate drain, but less efficient than a condensing unit and it needs 4-inch stainless venting.
Can it be used for radiant heat?+
Yes — Takagi lists it as suitable for radiant-heating applications as well as light residential domestic hot water.
Price range from leading retailers
* As an Amazon Associate, we earn from qualifying purchases
