Tankless water heaters were once the wave of the future, but now they are gaining in popularity every day as homeowners and business owners alike discover the benefits of instant water heating technology. Takagi is a leader in the industry for the best in tankless water heating, and there are many units to choose from. PlumbingSupply.com is your source for Takagi tankless water heaters that are good for your energy budget, and good for the environment!

Takagi T-K3 Tankless Water Heater	Takagi T-K3-SP Tankless Water Heater	Takagi TK3-OS Tankless Water Heater
Takagi T-K Jr. Tankless Water Heater	Takagi T-K3-PRO Tankless Water Heater	Takagi Mobius TM32 Tankless Water Heaters
Accessories for Takagi tankless water heaters

Takagi Tankless Water Heater Comparison Chart
Model	Comparison Details
	Max BTU (NG)	Min BTU (NG)	Flow Rate GPM)	1st Hour Rating	Energy Factor	Thermal Efficiency	Net Weight	Dimensions (H x W x D)"
FLASH T-K Jr	140,000	19.500	0.75 - 5.8	181 gal/hr (77°F rise)	NG: 0.81 LP: 0.81	NG: 83% LP: 84%	30 lbs	20 x 14 x 6
FLASH T-K3	199,000	11,000	0.50 - 7.0	257 gal/hr (77°F rise)	NG: 0.82 LP: 0.84	NG: 86% LP: 87%	40 lbs	20.5 x 13.8 x 8.5
FLASH T-K3-OS	190,000	11,000	0.50 - 7.0	246 gal/hr (77°F rise)	NG: 0.83 LP: 0.83	NG: 82.6% LP: 83.3%	40 lbs	20.5 x 13.8 x 8.5
FLASH T-K3-SP	190,000	11,000	0.50 - 7.0	240 gal/hr (77°F rise)	NG: 0.81 LP: 0.82	NG: 82.3% LP: 83.8%	40 lbs	20.5 x 13.8 x 8.5
MOBIUS T-K3-PRO	199,000	11,000	0.50 - 7.0	252 gal/hr (77°F rise)	NG: 0.827 LP: 0.833	NG: 82.3% LP: 83.6%	40 lbs	20.5 x 13.8 x 8.5
MOBIUS T-M1 Discontinued	235,000	25,000	0.75 - 9.6	300 gal/hr (77°F rise)	NG: 0.81 LP: 0.82	NG: 82.3% LP: 84.7%	70 lbs	24 x 18 x 9
MOBIUS T-M32	240,000	24,000	0.50 - 9.0	300 gal/hr (77°F rise)	NG: 0.82 LP: 0.84	NG: 82.2% LP: 83.9%	56 lbs	23.6 x 18.5 x 8.9

Takagi Tankless Water Heater Flow Rate Guide (Temp Rise vs GPM)
Model		Temperature Rise (F°)
		35	40	45	50	55	60	65	70	75	80	85	90	95	100	105	110
FLASH T-K Jr	G P M	5.8	5.7	5.1	4.6	4.2	3.8	3.5	3.3	3.1	2.9	2.7	2.6	2.4	2.3	2.2	2.1
FLASH T-K3		7.0	7.0	7.0	6.5	5.9	5.4	5.0	4.7	4.3	4.1	3.9	3.6	3.5	3.3	3.1	3.0
FLASH TK3-OS		7.0	7.0	6.9	6.2	5.7	5.4	4.8	4.4	4.1	3.9	3.7	3.5	3.3	3.1	3.0	2.8
FLASH T-K3-SP		7.0	7.0	6.9	6.2	5.7	5.4	4.8	4.4	4.1	3.9	3.7	3.5	3.3	3.1	3.0	2.8
MOBIUS T-K3-PRO		7.0	7.0	6.9	6.2	5.7	5.4	4.8	4.4	4.1	3.9	3.7	3.5	3.3	3.1	3.0	2.8
MOBIUS T-M32		9.0	9.0	8.5	7.7	7.0	6.2	5.9	5.5	5.0	4.8	4.5	4.2	4.0	3.8	3.6	3.5

Takagi Tankless Water Heater Quick Installation Check List
Category	Sub-Category	Description
Electrical	Voltage	120 VAC electrical ground all the way back to electrical service panel
Water	Pressure	A steady 50 - 60 PSI
	Quality	Hard water much be treaded with softener or conditioner
	Well Water	Water pressure must be checked & mineral contents treated
	Pipe Material	No galvanized supply water pipe
	Pressure Relief Valve	Pressure relief only, no T&P
	Recirculation Line	Recirculation lines should go through a small electric water heater and not directly back through the Takagi tankless water heater
Gas	Gas Type	Natural Gas or Liquid Propane - Option to specify is available when ordering
	Pipe Size	Minimum 3/4" I. D. (inside diameter)
	Pressure (NG)	7.0 WC (water column) ideally
	Pressure (LP)	10.0 WC (water column) ideally
Air	Material	Exhaust: 4" stainless steel, cat III Intake: 3" any material - seal connection
	Layout	4" exhaust must be individually run per unit all the way to outside No common venting No increase or decrease in diameter
	Venting Length	25 - 50ft depending on unit - Deduct 5ft for each elbow used in the venting
	Condensation	Must have condensation drain when linier run exceeds more than 5ft to protect heat exchanger
	Combustion Air Supply	Air supply from outside: 1sq. Inch / 15,000 BTU Air supply from inside: 1sq. Inch / 1,000 BTU

Takagi Tankless Water Heater Accessory Compatibility Chart

Gas Water Heater Accessories Takagi Tankless Water Heater Models Description Accessory Part # T-KJr T-K3SP T-K3OS T-K3 T-K3-PRO T-H1 T-M1 T-M32 T-M50 Back Flow Preventer TK-BF01 (TK-TV03) ✓ ✓   ✓ ✓ ✓ ✓ ✓   TM-BF50                 ✓ Wall Vent Terminator (Louver) TK-KPWL4-1 (TK-TV01) 4.2 - 6" wall thickness ✓ ✓   ✓ ✓ ✓ ✓ ✓   TK-KPWL4-2 5.6 - 9" wall thickness ✓ ✓   ✓ ✓ ✓ ✓ ✓   TK-KPWL4-3 8.2 - 14" wall thickness ✓ ✓   ✓ ✓ ✓ ✓ ✓   Wall Vent Terminator (Hood) TK-KPWH4-1 4.2 - 6" wall thickness ✓ ✓   ✓ ✓ ✓ ✓ ✓   TK-KPWH4-2 5.6 - 9" wall thickness ✓ ✓   ✓ ✓ ✓ ✓ ✓   TK-KPWH4-3 8.2 - 14" wall thickness ✓ ✓   ✓ ✓ ✓ ✓ ✓   Outdoor Vent Cap TK-TV04 ✓ ✓   ✓ ✓         TM-TV06             ✓     TK-TV08           ✓       TM-VC32               ✓   TM-VC50                 ✓ Direct Vent Kit TK-TV07           ✓       TK-TV09   ✓               TK-TV10       ✓ ✓         TM-TV11                   TM-DV32               ✓   TM-DV50                 ✓ Well Vent Terminator (Direct Vent) TK-TV13 ✓     ✓ ✓ ✓       Recess Box TK-RB01   ✓   ✓ ✓         TK-RB02     ✓             Pipe Cover TK-PC01   ✓ ✓ ✓ ✓         TM-PC32               ✓   TM-PC50                 ✓ Multi-Unit Controller (Includes TM-RE30) TM-MC01 (RE20 + RE30)             ✓ ✓ ✓ Remote Control TK-RE02 (TK-RE01) ✓ ✓ ✓             TM-RE30 (TM-RE10)       ✓ ✓   ✓ ✓ ✓ Installation Kit Includes Isolation Valves, Pressure Relief Valve TK-IV01 ✓ ✓ ✓ ✓ ✓ ✓       TM-IV32             ✓ ✓   TM-IV50                 ✓

How Takagi Tankless Water Heaters Work

Takagi Tankless Water Heater Single Unit Recirculation Example

Takagi Tankless Water Heater Multi Unit Recirculation Example

"What type of vent do these tankless water heaters require?" These tankless water heaters require Category III stainless steel vent only.

All Takagi Tankless Water Heaters must be installed by a licensed professional.

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