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Quick History
In 1963 Takagi Takagi
developed an automated ignition an automatic ignition system for a gas
water heater. This was followed in 1970 with a revolutionary automatic gas
control valve system. Takagi Industrial developed a computer modulating gas
valve and safety system for its tank-less water heaters 1980 which was followed
by a microchip controlled gas water heater in 1982. These and following
milestones set by Takagi were major milestones within the tankless hot water
industry.
The thermal efficiency of
the Flash T-K2 is over 85% using natural gas and 86% on propane gas with low Nox
emission to meet AQMD (Air Quality Management District) regulation.
Because Takagi demand hot water heaters
are able to vary heat, they can be used with water pre-warmed by solar hot
water heating. Variable heat also provides the advantage of more
consistent heat , less affected by water flow fluctuations.
Flash T-K2
Natural Gas Input |
Min. 20,000 Btu |
Max. 185,000 Btu |
LPG Input |
Min. 19,000 Btu |
Max. 175,000 Btu |
Gas Connection |
3/4" NPT |
|
Water Connections |
3/4" NPT |
|
Water Pressure |
Min. 15 psi |
Max. 150 psi |
Natural Gas Pressure Inlet |
Min. 5" WC |
Max. 11" WC |
LP Gas Pressure Inlet |
Min. 11" WC |
Max. 14" WC |
Manifold Pressure |
Natural 2.3" WC |
Propane 2.5" WC |
Weight |
60 lbs. |
|
24.5" x 16.5" x 8.3" |
Electronic Ignition |
|
AC 120 V |
|
|
Dimensions |
|
|
Ignition |
|
|
Electrical Supply |
|
|
Product Comparisons
Model |
FLASH T-K Jr. |
FLASH T-KD20 |
FLASH
T-K2 |
FLASH T-K1S |
MOBIUS T-M1 |
BTU Max (NG) BTU |
140,000 |
185,000 |
185,000 |
190,000 |
235,000 |
BTU Min (NG) BTU |
19,500 |
20,000 |
20,000 |
15,000 |
25,000 |
Flow Rating (GPM) |
0.75 - 5.8 |
0.75 - 6.9 |
0.75 - 6.9 |
0.75 - 7.2 |
0.75 - 9.6 |
First Hour gallons/hour |
181 |
240 |
240 |
245 |
300 |
Rating gallons/minute |
3.0 |
4.0 |
4.0 |
4.1 |
5.0 |
(DOE) |
(77F rising) |
(77F rising) |
(77F rising) |
(77F rising) |
(77F rising) |
Net Weight (lbs.) |
30 |
60 |
60. |
46. |
70. |
Energy Factor |
NG 0.81
LP 0.81 |
NG 0.81
LP 0.84 |
NG 0.83
LP 0.84 |
NG 0.85
LP 0.87 |
NG 0.81
LP 0.82 |
Dimensions HxWxD |
20.0" 14.0" 6.0" |
24.0" 18.0" 9.0" |
24.0" 18.0" 9.0" |
24.5" 16.5" 8.3" |
24.0" 18.0" 9.0" |
Thermal |
Natural: 83% |
Natural: 82 |
Natural: 85 |
Natural: 85% |
Natural: 82.3%\ |
Efficiency |
LP: 84% |
LP: 83% |
LP: 86% |
LP: 87% |
LP: 84.7% |
Model |
Input
(Btu) |
Efficiency |
GPM Flow Rate
@ 55°F
rise |
Vent Type |
Vent Size |
Ignition System |
Activation Flow
in GPM |
Heat Exchanger
Warranty |
T-K Jr. |
140,000 |
84% |
4.2
|
Forced |
4" |
Electronic |
0.75 GPM
|
7 Years |
T-K2 |
185,000 |
86% |
5.7
|
T-KD20 |
83% |
5.7 |
Direct |
T-K1S |
190,000 |
87% |
5.7 |
Forced |
Link to
Takagi
web site
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