Flash T-K Jr.

Released in 2003, the T-K Jr. is the smallest water heater in the Takagi tankless line. But this small, but powerful unit - with gas inputs up to 140,000 BTU per hour - can meet all the hot-water needs of a small American home or apartment with one or two bathrooms, as well as smaller commercial applications. Designed to virtually do anything a 40-gallon tank-type water heater can do and more, the compact, wall mounted T-K Jr. can support hydronic baseboard or radiant floor heating applications, as well as provide domestic hot water to plumbing fixtures and appliances. The T-K Jr. has an efficiency rating of 83%, using natural gas, and 84% with propane. At an average ∆T (rise in temperature) of 60°F in warmer areas - where the winter ground water is 60°F and with the output set at 120°F - the unit will provide 3.8 GPM, or 228 GPH. In colder areas where the input temperature may be 40°F or less you can expect a flow rate of about 2.7 GPM or 162 GPH.

Cost-efficient and environmentally friendly, the T-K Jr. can be converted into a direct-vent unit by using the optional TV09 conversion kit for installation in a garage, a utility closet or any confined space in which makeup air may be limited. Please refer to "Accessories" for more information on venting options.

Using the average of 60°F input water cited above, the T-K Jr. can provide enough hot water for one shower and a lavatory basin at a time; or one low-flow shower (2.5 GPM or less) and an appliance, such as a dishwasher or washing machine, at the same time. For much colder input temperatures, such as 40°F or lower, this unit can provide endless hot water for consecutive uses; that is, running only one major fixture at a time. Please refer to the flow charts for specific rates.

The four preset temperatures on the unit are: 113°F, 122°F, 140°F, and 182°F. To achieve any temperatures other than those presets, your client will require the TK-RE20 temperature controller.

Flash T-K3-SP

Released in 2008, the T-K3-SP is one of Takagi's residential tankless water heaters. At 13.8 inches wide and weighing only 40 pounds, its ultra-compact design allows it to be mounted on a wall or installed between two wall studs using Takagi's TK-RBO1 recess box, so it's even more inconspicuous.

The T-K3-SP features a built-in power venting system and requires Category III venting or vent caps. It can provide an unlimited supply of hot water continuously because there is no storage tank to heat and reheat.

The T-K3-SP starts heating water at 0.5 gallons per minute (GPM), and can keep that endless supply of hot water running up to a maximum flow rate of 7.0 GPM. The T-K3-SP also offers four separate temperature settings, ranging from 113 to 167 degrees Fahrenheit, so it does not require the use of a separate remote control. Unlike other Takagi models, the T-K3-SP is not linkable or direct vent convertible.

Flash T-K3

There are many features that make this unit stand out from the rest:

Compact Size: Only 13.8 inches wide, the T-K3 can be recessed between wall studs for even more space savings! A special recess box is available for outdoor installations.

Lower Activating Flow Rate: The T-K3 activates at only 0.5 GPM, which allows the use of smaller water flows in bathroom sinks and showers. This reduces water waste and allows for stable temperatures.

Parallel Installation: Using Takagi's Easy Link technology, the T-K3 can be installed in parallel with up to three other units without the use of an additional control box, generating more flow while saving money, space and installation time. Four T-K3 unites will deliver a total of 21.6 GPM at 60 degrees F delta T; or 26 GPM at a 50 degree F delta T.

Direct-Vent Conversion: The T-K3 can be easily converted into a direct vent model for inside installations that need to import combustion air from outside.

Eight Temperature Settings: Instead of the usual four settings, the T-K3 offers eight separate temperatures, set by dip-switch: 104 degree F, 113 degree F, 122 degree F, 131 degree F, 140 degree F, 158 degree F, 176 degree F, and 185 degree F. This versatility reduces the need for a separate remote control. However, setting temperatures other than the eight presets requires the TM-RE10 temperature controller.

Longer vent runs: The T-K3 can have a vent pipe run up to 50 feet with five elbows, instead of the normal 35 with three elbows.

As you can see, the T-K3 incorporates all those "why-don't-you-have-this?" features into this one new product. Its larger flow capacity through parallel connections will meet the hot-water needs of most high-volume residential applications and many commercial projects, too. In short, the T-K3 fills the gap between the single residential heater and multiple commercial T-M1 units. Performance depends on the temperature of the ground water of course: At a delta T of 60 degrees F in warmer areas - for example, where the winter ground water is 60 degrees F and with the output set at 122 degrees F - the T-K3 will provide a 5.4 GPM, or 324 GPH. In colder areas where the input temperature may be 40 degrees F or less, expect a flow rate about 4.1 GPM, or 246 GPH.