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Takagi

Takagi T-M50 Mid-Range Condensing Tankless Water Heater

Model T-M50
4.1/5 from 70 ratings
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Btu
175000
Venting
PVC Direct Vent
Fuel Type
Natural Gas
Tank Type
Tankless
Capacity Gpm
8.5
Energy Factor
0.93

Takagi T-M50 Mid-Range Condensing Tankless Water Heater Review

The Takagi T-M50 is a mid-range condensing tankless water heater in Takagi's residential lineup. Sized between the T-H1 (110K BTU) and T-H3 (199K BTU) platforms.

Specs: 180,000 BTU natural gas input, UEF 0.94 condensing, 8.4 GPM at a 35°F rise, stainless steel heat exchanger, PVC condensing venting. 12-year warranty on heat exchanger.

The 180K BTU mid-range serves 2-bath warm-climate homes or 2-bath cold-climate homes with sequential demand. Right answer for buyers wanting condensing tankless at modest capacity where 199K BTU would be oversized.

About $1,700 unit, $3,200 installed. Right buyer: 2-bath primary residence wanting mid-capacity condensing tankless through plumbing supply channels.

Pros
  • On-demand operation at 8.5 GPM — no standby heat loss; unlimited hot water if demand is within flow-rate capacity
  • Strong UEF 0.93 efficiency — approximately 20% lower annual operating cost vs 0.62 standard
  • 12-year warranty — above-average protection; most competitors offer 6
  • 8.5 GPM flow rate — sized for 2-bath simultaneous demand in warm-climate installs
Cons
  • Requires dedicated 175K BTU gas supply line — undersized gas piping is the leading cause of flow-rate shortfalls

Full Specifications

Brand
Takagi
Model Number
T-M50
Btu
175000
Venting
PVC Direct Vent
Fuel Type
Natural Gas
Tank Type
Tankless
Capacity Gpm
8.5
Energy Factor
0.93
Warranty Years
12

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