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Simple, straightforward and low shipping rates for these tankless water heaters.


Bosch/Aquastar Tankless Water Heaters


Bosch is a leader in the tankless water heater industry, providing tankless water heating for a variety of applications. If you are replacing your existing water heater, why not go tankless? The benefits will be noticed the very first time you use it, and you'll wonder why you waited so long to go tankless!.

Bosch Therm 330 PN Tankless Water Heaters

The ideal tankless solution for smaller residential applications, this modern day tankless water heater provides instant hot water and doesn't waste energy when you don't need hot water

Bosch 330 PN tankless water heater
This tankless water heater features:
  • Endless hot water for residences with one shower
  • Piezo ignition system requires no electrical connection
  • 3.3 gallons per minute capacity at 35°F degree rise
  • Minimum activation flow rate of 0.5 gallons per minute
  • High to low temperature control
  • Built for durability and serviceability
  • Integral safety features include flame failure prevention and a temperature limit device to prevent overheating
  • Available in NG and LP models
  • Overall dimensions: 12.20" x 22.83" x 8.66"
  • Weight: 26 lbs.
  • View specifications
Venting
  • Natural Draft
  • Vent diameter: 4" double wall type B
  • Minimum height: 6' with no elbows
  • Vertical termination only
Water related specifications
  • Min Flow Rate: 0.5 gpm
  • Inlet Connection: 1/2" NPT
  • Outlet Connection: 1/2" NPT
  • Max Water Pressure: 150 psi
  • Min Water Pressure: 13 psi
  • Connections at bottom of heater
Gas/power related specifications
  • Gas connection: 1/2" NPT
  • Min NG/LP pressure: 5.7 / 10.5 Inch WC
  • Max NG/LP pressure: 14 Inch WC
  • Max Input: 75,000 BTU/hr
  • Min Input: 30,735 BTU/hr
  • 78%+ thermal efficiency

Important Note: these water heaters are not designed for outdoor installation, use above 4,500ft A.S.L. altitude, in mobile installations, or for space heating purposes. Also, if the inlet water temperature is higher than 140°F, then a 3-way valve or mixing valve must be installed.


Model Description Select Item(s)
330 PN NG Tankless Water Heater - Natural Gas add to quote →
330 PN LP Tankless Water Heater - Propane add to quote →
40463 Accessory: Isolation Water Valves - Set of 2 add to quote →

- Or -
Click here to view items that you would like to have quoted

Save money and get a quick price quote ... it only takes a minute and is well worth it!!!
Unlike most other products, we cannot show our low pricing on the web for these items (click here to find out why).
To request a price quote, simply select the items you are interested in by clicking the box "Add to quote →"
Then click the button to add the item(s) to your quick quote request list.




Bosch Therm 940 ES Tankless Water Heaters

This high capacity tankless water heater is designed to meet the demands of busy households and can even be used in most solar thermal and recirculation applications. Mobile home certified, this model can be installed almost anywhere thanks to its sealed combustion and dual-fan technology.

Bosch 940 ES tankless water heater
This tankless water heater features:
  • Endless hot water for up to three applications at once
  • Electronic ignition and patented burner design
  • Minimum activation flow rate of 0.5 gallons per minute
  • Default 122°F temperature is adjustable with built-in digital control panel with precise 2°F temperature increments between 100°F and 140°F
  • Built for durability and serviceability
  • Integral safety devices including overheat prevention and inlet, outlet, and backflow temperature sensors
  • Available in NG and LP models
  • Overall dimensions: 17-7/8" x 30-1/2" x 11-1/4"
  • Weight: 67 lbs.
  • Low NOx 2012 Compliant
  • View specifications
Venting
  • Requires 3" or 4" Category III stainless steel venting
  • Vents vertically or horizontally
Water related specifications
  • 9.4 gpm capacity at 35°F degree rise
  • 6.0 gpm capacity at 55°F degree rise
  • Min Flow Rate: 0.5 gpm
  • Inlet Connection: 3/4" NPT
  • Outlet Connection: 3/4" NPT
  • Max Water Pressure: 150 psi
  • Min Water Pressure: 30 psi
  • Connections at bottom of heater
Gas/power related specifications
  • Gas connection: 3/4" NPT
  • Min NG/LP pressure: 3.5 / 8 Inch WC
  • Max NG/LP pressure: 10.5 / 13 Inch WC
  • Max Input: 199,000 BTU/hr
  • Min Input: 19,900 BTU/hr
  • 83%+ thermal efficiency

Important Note: these water heaters are not designed for use above 8000ft A.S.L. altitude or for space heating purposes. Outdoor installation requires an outdoor kit (PTOK). Also, if the inlet water temperature is higher than 140°F, then a 3-way valve or mixing valve must be installed.


Model Description Select Item(s)
940 ES NG Tankless Water Heater - Natural Gas add to quote →
940 ES LP Tankless Water Heater - Propane add to quote →
↓ Accessories ↓
PTOK Outdoor Installation Kit add to quote →
9620LA Isolation Valve Kit add to quote →
Flexible Corrugated Stainless Steel Water Connector - 3/4" FIP x 3/4" FIP - 18" Long add to quote →
Flexible Corrugated Stainless Steel Water Connector - 3/4" FIP x 3/4" FIP - 24" Long add to quote →
Flexible Corrugated Copper / Stainless Steel Water Connector - 3/4" FIP x 3/4" Nom Sweat - 18" Long add to quote →
Flexible Corrugated Copper / Stainless Steel Water Connector - 3/4" FIP x 3/4" Nom Sweat - 24" Long add to quote →

- Or -
Click here to view items that you would like to have quoted

Save money and get a quick price quote ... it only takes a minute and is well worth it!!!
Unlike most other products, we cannot show our low pricing on the web for these items (click here to find out why).
To request a price quote, simply select the items you are interested in by clicking the box "Add to quote →"
Then click the button to add the item(s) to your quick quote request list.




Bosch Greentherm C 1050 ES Tankless Water Heaters

Condensing water heaters capture the latent heat of the flue gases to essentially pre-heat the water, boosting the efficiency by approximately 10% when compared with an equivalent non-condensing heater. And that's only the tip of the benefit iceberg. Tankless water heaters are inherently more efficent than tank style heaters as they only use gas to heat the water when there is a demand, saving you from wasting money keeping water warm when you don't need it. And, speaking of large, these water heaters are not. Requiring only a fraction of the space of a traditional tank-style water heater, these fantastic condensing water heaters are wall mounted and can typically be vented right through that same wall, saving you even more space, time, and money. Need more hot water at once? No problem - this model may be link with up to four of the same model to meet higher hot water demands. All together, you really couldn't ask for a better water heater!

Bosch Greentherm C 1050 ES tankless water heater
This tankless water heater features:
  • Designed for residential or commercial applications
  • May link up to 4 units for higher hot water demands
  • Minimum activation flow rate of 0.5 gallons per minute
  • Default 122°F temperature is adjustable with built-in digital control panel with precise 2°F temperature increments between 100°F and 140°F
  • Built for durability and serviceability
  • Integral safety devices including overheat prevention and inlet, outlet, backflow, and exhaust temperature sensors
  • Built in freeze protection
  • Available in NG and LP models
  • Overall dimensions: 17-7/8" x 30-1/2" x 11-1/4"
  • Weight: 74 lbs.
  • Low NOx 2012 Compliant
  • View specifications
Venting
  • May use 3" or 4" Category III stainless steel twin pipe or concentric venting, depending on installation
  • Concentric up-and-out venting for single units
  • Linked units may use a single roof vent
  • Vents vertically or horizontally
Water related specifications
  • 10.7 gpm capacity at 35°F degree rise
  • 6.8 gpm capacity at 55°F degree rise
  • Min Flow Rate: 0.5 gpm
  • Inlet Connection: 3/4" NPT
  • Outlet Connection: 3/4" NPT
  • Max Water Pressure: 150 psi
  • Min Water Pressure: 30 psi
  • Connections at bottom of heater
Gas/power related specifications
  • Gas connection: 3/4" NPT
  • Min NG/LP pressure: 3.5 / 8 Inch WC
  • Max NG/LP pressure: 10.5 / 13 Inch WC
  • Max Input: 199,000 BTU/hr
  • Min Input: 19,900 BTU/hr
  • 94%+ thermal efficiency

Important Note: these water heaters are not designed for use above 8000ft A.S.L. altitude or for space heating purposes. Outdoor installation requires an outdoor kit (PTOK). Also, if the inlet water temperature is higher than 140°F, then a 3-way valve or mixing valve must be installed.


Model Description Select Item(s)
C 1050 ES NG Condensing Tankless Water Heater - Natural Gas add to quote →
C 1050 ES LP Condensing Tankless Water Heater - Propane add to quote →
↓ Accessories ↓
PTOK Outdoor Installation Kit add to quote →
9620LA Isolation Valve Kit add to quote →
Flexible Corrugated Stainless Steel Water Connector - 3/4" FIP x 3/4" FIP - 18" Long add to quote →
Flexible Corrugated Stainless Steel Water Connector - 3/4" FIP x 3/4" FIP - 24" Long add to quote →
Flexible Corrugated Copper / Stainless Steel Water Connector - 3/4" FIP x 3/4" Nom Sweat - 18" Long add to quote →
Flexible Corrugated Copper / Stainless Steel Water Connector - 3/4" FIP x 3/4" Nom Sweat - 24" Long add to quote →

- Or -
Click here to view items that you would like to have quoted

Save money and get a quick price quote ... it only takes a minute and is well worth it!!!
Unlike most other products, we cannot show our low pricing on the web for these items (click here to find out why).
To request a price quote, simply select the items you are interested in by clicking the box "Add to quote →"
Then click the button to add the item(s) to your quick quote request list.




Please note: For potential safety reasons, we do not recommend using PVC to vent gas tankless water heaters.
For the best results, always follow the manufacturer's recommendations regarding metal venting pipe.




Looking for parts for your Aquastar/Bosch?

Note: if you're replacing multiple water heaters (old tank style),
you may want to order a water heater drain pump to reduce labor by quickly/easily removing the water.




Help save our environment by saving energy.
Stand-by heat loss wastes a LOT of energy.
Installing tankless water heaters saves
energy, as well as your pocket book in the
long run. Think future! Think green.
Think Tankless!
Frequently Asked Questions

Q. "Aquastar specifies the 'temp. rise' based on the GPM flow; what do you mean by this?"
A. Temperature rise is the amount the heater raises the temperature of the incoming water, based on the flow rate shown of that water.

Q. "A friend of mine has a model 170 Aquastar. I don't see it listed on your site?"
A. They are no longer available anywhere. For higher btu than the above, we recommend the very efficient Takagi tankless water heaters.

Q. "Will an instantaneous water heater save me money on my utility bills?"
A. In many applications you can see a savings. There are some variables that could reduce the amount you save. One example is you will not run out of hot water, so longer showers could cut into your savings. Also, the cost of electricity, propane and natural gas in your area will affect the amount of money saved. The higher the cost for the energy type used to heat your water, the quicker you can recover the higher initial cost of installing a tankless versus tank style water heater.

Positives:

    You will never run out of hot water. "You want an hour long shower? No problem!"
    Electric units can be installed at the point of use.
    You're not paying energy costs to heat water 24 hours a day.
    They're easy to install.
    Our electric units don't require a T&P valve (no tank!) - if code allows
    Installing a tankless water heater can indeed be a bonus to the environment (why should we choose wastefulness when we're talking about finite natural resources?)

Negatives:

    They all need a minimum flow rate & pressure to turn on.
    The faster water flows through them, the lower the temperature rise. So, if you expect to take a shower while the clothes washer is running, you will need to select a unit sized to your maximum hot water flow requirements. (Gas units generally handle this a little better than electric models)
    Electric units need heavy gauge wire. Example: the 9.5kw must have 8ga wire and a 50amp breaker.
    Gas units need a much larger, special flue pipe and larger gas supply than a conventional water heater.
    At times they can produce very hot water. It's easier to get scalded.
    Gas units are more complicated than a conventional water heater.
    With some brands, parts are hard to find (not a negative if you originally purchase from us, as we like to carry parts for the units that we sell).

Summary:
Tankless water heaters have their place. They're not "the answer" to every hot water need, but if they're used correctly they can be the solution to many of them.



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