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Aqua Star 240FX

The Bosch AquaStar 240FX is now obsolete and has been replaced by the Bosch AquaStar 250SX. The 250SX is smaller, more efficient and better designed than the 240FX.

The following description of the obsolete 240FX is left here for your reference only. If you purchase the 240FX we will ship you a 250SX instead.

Click here for the Installation manual

America's most versatile tankless water heater supplies two hot water outlets simultaneously. Built-in power vent lets you vent vertically or horizontally, indoors or outside in warm climates. Electronic ignition. Highest energy factor (.84) in America.

The tankless design and computerized temperature control insure that the unit will provide an endless supply of hot water at a rate of five gallons per minute. Electronic ignition means that gas is consumed only when you are using hot water. The superlative Energy Factor of .84 means that the 240FX reduces greenhouse gas emissions by half, compared to a storage tank.

May be installed in a variety of locations, indoors or outside in warm climates, thanks to a versatile, built-in power venting system that allows for vertical venting into a flue, or horizontal venting through a wall. "Intelligent" computer monitored safety controls including over-heat cut-off device, hi-limit sensor, temperature sensor, computer controlled modulating gas valve, and freeze prevention device assure the highest degree of safety and efficiency.

Power Input Natural Gas — 37,000-165,000 BTU
LP Gas — 35,000-165,000 BTU
Water Pressure Minimum — 15 PSI
Maximum — 150 PSI
Gas Connection 3/4" Male NPT
Water Connection 3/4" Male NPT
Natural Gas Pressure Minimum — 6.5" WC
Maximum — 10.5" WC
LP Gas Pressure Minimum —11" WC
Maximum — 14" WC
Electrical Supply 120 Volts / 0.8 Amps
Minimum Flow to Activate 3/4 gallon per minute
Flow Rates 90F rise / 2.9 gallons per minute
80F rise / 3.3 gallons per minute
70F rise / 3.8 gallons per minute
60F rise / 4.4 gallons per minute
50F rise / 5.3 gallons per minute
All Installation manuals are located on the Technical page located/linked at the top of every web page.

Technical Page

buynow.gif (475 bytes)$995.00 buynow.gif (475 bytes)$995.00
Aqua Star 240FX Natural Gas includes wall mounting brackets, pressure relief valve. [OBSOLETE MODEL. This model has been replaced by the Bosch AquaStar 250SX NG.] Aqua Star 240FX Propane includes wall mounting brackets, pressure relief valve. [OBSOLETE MODEL. This model has been replaced by the Bosch AquaStar 250SX NG.]


buynow.gif (475 bytes) $99.00
FXHood  Wall Vent Terminator for FX model 240.    The 125FX pricing below includes the FXhood.  The Fxhood for horizontal venting.  If you are venting out through a side wall and are purchasing the Aqua Star 240FX, you will need this part.  The FXhood has a back flow vent already included in the product.

  Temperature Remote Control $120.00

Back Flow Vent  -- Suggested to be used in addition to the Fxhood for horizontal installations in areas where the wind chill is below 5 degrees.  $89.00


Note: Model 240FX is manufactured for CEC by Takagi. The AquaStar name is trademarked and licensed by Bosch.

The 240FX water heater is warranteed by the Manufacturer (Takagi USA) through Controlled Energy Corp. (CEC). CEC will furnish a replacement heat exchanger and will furnish a replacement of any other part which fails in normal use and service within the applicable periods specified below, in accordance with the terms of this warranty. The CEC replacement will be warranted for the unexpired portion of the original warranty. This warranty will be valid only for water heaters in possession of the original purchaser as recorded on the warranty card.

If the heat exchanger fails within five (5) years after the original installation and operation, CEC will furnish a replacement heat exchanger. However, if the water heater is installed in other than a single family dwelling, or is used as a circulating heater in any application, this heat exchanger warranty is limited to two (2) years from date of original installation and operation.

If any other part fails within two (2) years after original installation and operation, CEC will furnish a replacement part free of charge.

In addition to supplying the replacement part(s), CEC will pay transportation costs for these parts to a convenient delivery point near you selected by CEC, such as a local AquaStar dealer or distributor.

This warranty does not cover any labor costs associated with service, removal or re-installation of part(s). All such costs must be borne by the Purchaser.

This warranty will not apply:

1. to defects or malfunctions resulting from failure to properly install, operate or maintain the unit in accordance with the printed instructions provided;
2. to damage or abuse, accident, neglect or freezing and other acts of nature;
3. to damage resulting from operation with any safety devices disabled;
4. to failure of the heat exchanger resulting from the operation of the water heater in a corrosive atmosphere or at water temperatures exceeding the maximum rating, or if the water heater is not supplied with potable water;
5. to defects or damage caused by any attachment or modification, including any energy-saving device.

Note: The water heater must be free of damaging scale deposits and not subject to gas pressures greater than those shown on the rating plate, which must not be altered, defaced or removed.

1. The Owner should contact the dealer who sold the water heater covered by this warranty or
2. Owner should submit the warranty claim directly to CEC at the address listed below, and they will arrange for the handling of the claim.
3. Whenever any inquiry or service request is made, be sure to include the water heater model number, the date of manufacture, date of installation, Dealer's name and the watts and voltage.
4. When returning the water heater or component part(s), they must be individually tagged and identified with the Returned Goods Authorization # issued by CEC and shipped prepaid to CEC at the address below.

No one is authorized to make any other warranties on behalf of CEC. It is expressly understood that the replacement warranty of CEC shall be in lieu of any and all other warranties, express or implied, including warranties of merchantability or fitness for a particular use or purpose, and further that CEC shall not be liable for any loss or damage directly or indirectly arising from the use of the hot water heater, or for any consequential damages arising from such use (including damages from water leakage). CEC's sole liability with respect to any defect shall be for the replacement of defective part(s). Some states do not allow such limitations and exclusions, so the above may not apply to you. This warranty gives specific legal rights. You may also have other rights which vary from state to state. In the event that warranty service is required, reasonable proof of the effective date of installation and operation must be provided; otherwise it may not be possible to honor warranty.




Electric Water Heaters, Tankless Electric Water Heaters

Electric Water Heaters, Tankless Electric Water Heaters

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