Takagi T-K2 as a Hydronic and Radiant Heat Source

An application note describing how Takagi T-K2 as a Hydronic and Radiant Heat Source is used in practice.

Indirect Applications for Takagi T-K2 Tankless Water Heater

High Demand Water Heater Applications and Open/Closed Loop Hydronic and Radiant Heat Systems

Volume Indirect Water Heating for Residential & Commercial. Applications

The Takagi T-K2 Tankless Water Heater can be used as an indirect water heater in conjunction with a storage tank for high volume situations. The Storage tank should be 30 gallons or larger. The standby losses that are associated typical gas water heaters are eliminated because there is no flue dumping the stored heat out of the storage tank. Recovery time can be over 5 to 6 times faster than a typical gas water heater due to the high recovery rate of the Takagi T-K2. Efficiency is also maintained over time, which is not the case with a storage tank water heaters. You can use a typical electric tank water heater for the storage tank - you disconnect the heating elements and use the lower aquastat to activate the circulator relay to turn the circulator so when the tank's aquastat calls for hot water - it activates the circulator that will pump water from the tank to the Takagi T-K2 tankless water heater and then back to the tank. You can use different size tanks to accommodate up to 5 bathrooms or more. For those of you using multi-shower heads - this is an excellent and efficient way to use multi-shower heads and still get the efficiency of a tankless water heater. Also - if you want to use this in an open or closed loop heating system - you can heat your radiant floors with this also as show with the optional domestic hot water recirculating line. sells all the components needed for this system.

Components for an Indirect Water Heating System

Taco 0011 Bronze Pump Bronze 3/4 inch flange set Bronze 3/4 inch flow check Circulator Relay Please Note You should obtain the electric hot water storage tank from a local source as the cost to ship one of these is generally more than the cost of tank it self.

Components for an Open or Closed Loop Heating System

Since the Takagi T-K2 has a built in aquastat - the T-K2 can be used in a closed loop heating system or with a heat exchanger with or without a tank.