New Bosch PROTL Series

Global Protankless Supply is now carrying the full line of Bosch ProTL series gas tankless water heaters.  This is a special edition line of gas tankless water heaters Bosch has just released and will be available for a limited time.  The new Bosch ProTL series are the equivalent to the older Bosch Greentherm and Therm lines of gas tankless water heaters.  The only difference in the units from the older units is they are labeled as ProTL units and were designed to be sold directly to contractors and plumbers.  Please see below for the Bosch equivalent:

Bosch ProTL Model        Part Number     Bosch Equivalent Model
Bosch ProTL 199CL         7-736-505-107     Bosch Greentherm C1050ES LP
Bosch ProTL 199CN        7-736-505-109      Bosch Greentherm C1050ES NG
Bosch ProTL 175CL         7-736-505-106     Bosch Greentherm C950ES LP
Bosch ProTL 175CN        7-736-505-108      Bosch Greentherm C950ES NG
Bosch ProTL 199L           7-736-505-104      Bosch Therm 940ES LP
Bosch ProTL 199N           7-736-505-105      Bosch Therm 940ES NG
Bosch ProTL 175L            7-736-505-102     Bosch Therm 830ES LP
Bosch ProTL 175N           7-736-505-103      Bosch Therm 830ES NG

Please call Global Protankless Supply at 866-289-4652 for further questions or to place an order.

Bosch Greenstar Combi 151P Boiler (ZWB42-3A)

Global Pro Tankless Supply is pleased to announce we are now carrying the new Bosch Greenstar Combi 151P boiler (ZWB42-3A).  This new combi boiler is identical to the Greenstar Combi 151 boiler (ZWB42-3) except with the CRC200 thermostat, DHW tank sensor, supply sensor, expansion tank and twin pipe vent adapter removed.  These combi boilers provide both space heating and domestic hot water, while maintaining AFUE efficiencies of 95.0%.

All Greenstar Combi boilers are equipped with a high-strength stainless steel secondary exchanger and burner with double passage - ensuring consistent temperature output based on demand. The DHW hot water temperature control limit of 140°F helps prevent scale build-up within the heat exchanger.

Other features with this new boiler include a new electrical connection with a pre-wired 120V main power cable and plug. A new LP conversion kit which is easier to field convert the boiler.  All Bosch Greenstar boilers come with a Lifetime Limited warranty on the heat exchanger and a 5 year warranty on parts and labor.

Please call Global Pro Tankless Supply at 866-289-4652 for further questions or to place an order.

Replacement Parts for Bosch C800ES Gas Tankless Water Heater

Global Pro Tankless Supply is now carrying most of the replacement parts for the Bosch C800ES condensing gas tankless water heater.  The Bosch C800ES comes in Natural Gas (NG) or Liquid Propane (LP) and is a condensing heater.  Global ProTankless Supply carries most of the parts for the Bosch C800ES but if there is something we do not carry we can just have it drop shipped right from Bosch to the customer.  Please see the list below for most of the parts we carry.  Please remember that all Bosch replacement parts are non returnable.

• Ignition Group - Part #87013022490
• Control Unit - Part #87072072570
• Primary Fan - Part #87072040710
• Secondary Fan LP - Part #87072040740
• Water Valve w/engine - Part #87085050240
• Heat Exchanger - Part #87054063690
• Main Burner NG- Part #87081206420
• Mounting Bracket - Part #87013091640
• Condensing Heat Exchanger - Part #87057001610

If you do not see the part you are looking for please call us at 866-289-4652 and we can help you get the part you need.

We also carry the Bosch Greentherm C1050ES and is the direct replacement for the older C800ES.

Bosch Greenstar Floor Standing (FS) Combi & Straight Boilers

Global Protankless Supply is pleased to announce the highly anticipated Greenstar Floor Standing (FS) series boilers. The Greenstar FS Boilers are fully modulating heat only or combi floor standing gas condensing boilers with many of the same features and customer benefits of the Greenstar wall boiler, with some additional innovations.

Installation has been simplified, with two new innovations:

  a. The Greenstar FS includes an integrated supply return manifold that can be field converted into a low loss header (LLH) to accommodate existing pipe work.

  b. All line and low voltage connections have been relocated into junction boxes on
  the back of the boiler for easier access and wiring.

Venting options have been expanded from PVC, CPVC, concentric & ridged PP to also include flexible PP venting. This provides a quick and easy venting solution for retrofit applications where the boiler and piping is not relocated.

The FW200 Weather Compensation Boiler Control (87182262150) is an optional accessory and is not included with the Greenstar Floor Standing Boilers. The New System Control (NSC), capable of controlling multiple zones, will be launched around the same time as the new Greenstar FS to provide a flexible heating combination.  Please call Global Protankless Supply at 866-289-4652 for further details and to place your order.

Bosch Neutralizers for Condensing Boilers and Water Heaters

Bosch recently has started to carry the Condensate Neutralizers for all the Bosch condensing boilers and Bosch tankless water heaters.  Condensate Neutralizers are recommended on all condensing equipment and should be serviced annually. Currently we offer 6 different JJM condensate neutralizers that cover the entire product range from the smallest output of 57,000 BTU (16kW) to the largest of 5,443,000 BTU (1,550kW).

Below is a list of what condensate neutralizer to use for each Bosch condensing boiler and Bosch tankless water heater.

The JM-2C & JM-2C PLUS can be used for any boiler or tankless water heater up to 200,000 BTU.

The JM-6C must be used for the Bosch C1210ES/ESC as it is over 200,000 BTU

Please call us at 866-289-4652 for more information and pricing.

New changes to the Bosch Greentherm C950ES & C1050ES

Bosch is always making changes to their products to help improve performance.  Below are a few changes that have recently been approved for the Bosch Greentherm C950ES & Bosch Greentherm C1050ES tankless water heaters.

There have been a lot of new accessories added and approved for the heaters:
Accessories (Bosch part #)
• Concentric termination kit 3"/5"PVC (196006)
• Concentric vent kit 80/125 PP (7738003210)
• Concentric Up and Out kit (7 738 003 210)
• Neutralizer Kit (7738001483)
• Isolation Valve Kit (7738003449)
• Optional wireless remote control to operate with the appliance
(7709003213)
• Cascading kit (7 709 003 962)
• Outdoor kit (7709003913)
• Concentric termination kit 3"/6" PVC (196016)
• Exhaust/Intake bird screen (L2594)
• Condensate drain tee (196061) [included with Concentric
termination kits]
• Pipe Cover (PTPCES)
• High temperature kit (7736500074)
• Recess box kit (7736500043)
• Pressure relief valve (7 738 001 152)

The Bosch Greentherm C950ES & C1050ES can now be vented using 2" PVC/CPVC and must use the twin pipe system for this application.  Please see the venting section in the installation manual for more details.

The Front cover for the Bosch C950ES & C1050ES is changing from Silver to White.  This will be in effect for all the Greentherm and Therm units.

The Thermal Efficiency for the Greentherm C950ES heater is 94% with an Energy Factor of .95.
The Thermal Efficiency for the Greentherm C1050ES heater is 96% with an Energy Factor of .95.

Warranty updates
For recirculation applications:
The C950ES & C1050ES heat exchanger warranty has been improved to 10 years for the following applications:
- Controlled recirculation applications
- Combination DHW and space heating applications
This warranty statement takes affect with products produced since April 2014 (FD 420). C950ES & C1050ES products produced prior to April 2014 (before FD 420) will follow the previous warranty statement.

Model Numbers Pertaining to the Bosch Greenstar Combi and Straight Boilers

Below is a table describing the model numbers that pertain to the Bosch Greenstar gas-fired wall-hung boilers and combination boilers.

Z - Central heating appliance
W - DHW heating
B - Condensing technology
R - Constant temperature control
16 - Output up to 54,600 BTU/hr (16 kW)
21 - Output and DHW output up to 71,600 BTU/hr (21 kW)
28 - Output and DHW output up to 95,500 BTU/hr (28 kW)
35 - Output and DHW output up to 119,400 BTU/hr (35 kW)
42 - Output and DHW output up to 143,300 BTU/hr (42 kW)
-3 - Version
A - Fan-supported appliance
23 - Natural gas (NG) conversion to Liquid Propane (LP) comes with boiler

So if you wanted to reference model number "ZWB42-3" this would be the model number for the Bosch Combi 151 Gas-Fired Wall-Hung Boiler for space heating and domestic hot water (DHW).
Z - Central heating appliance
W - DHW heating
B - Condensing technology
42 - Output and DHW output up to 143,300 BTU/hr (42 kW)
-3 - Version

All Greenstar boilers and Combi units are fan assisted "A" and they all come preset for Natural Gas NG "23" but also come with the conversion kit for Liquid Propane LP.

Conversion:
Model #               Description
ZBR16-3             Bosch Greenstar Wall-Hung 57 Boiler
ZBR21-3             Bosch Greenstar Wall-Hung 79 Boiler
ZBR28-3             Bosch Greenstar Wall-Hung 100 Boiler
ZBR35-3             Bosch Greenstar Wall-Hung 131 Boiler
ZBR42-3             Bosch Greenstar Wall-Hung 151 Boiler
ZWB28-3            Bosch Greenstar Wall-Hung Combi 100 Boiler
ZWB35-3            Bosch Greenstar Wall-Hung Combi 131 Boiler
ZWB42-3            Bosch Greenstar Wall-Hung Combi 151 Boiler

New Bosch Greenstar 79 Gas-Fired Wall-Hung Condensing Boiler

Bosch has just introduced a new Greenstar 79 Gas-Fired Wall-Hung Condensing Boiler and it is very efficient and simple to set and operate.  Space heating boiler for connection to a hot water tank with unsurpassed performance and control. With special insulation to ensure ultra quiet operation and the exclusive keypad safety lock feature to prevent unwanted tampering with heating controls, this unit is the ideal "green" upgrade for detached & terraced houses and is also suitable for apartments.

The Greenstar 79 is simple to operate and some of the specifications include:

79,000 BTU 

AFUE rating of 95%

1" main heating connections

Can be vented with 2" or 3" PVC

3" PVC concentric vent kit available for vertical or horizontal installation

Telescopic Concentric Up and out vent kit available for horizontal installation 

The energy-savings and environmental features are:

Aluminum-Silicon heat exchanger delivers high efficiency with low temperature applications

Low NOx emissions ahead of 2012 SCAQMD regulations

Simple, intelligent control options optimize efficiency and fuel consumption

Low electrical consumption when the boiler is in standby mode

Electronic ignition

Anti-cycle and modulation control

This Greenstar 79 condensing space heating boiler can be used for either Natural Gas or Liquid Propane installations.   The heater comes preset for Natural Gas (NG), but can be converted to Liquid Propane (LP).  A gas conversion kit is included.

The Greenstar boiler comes with a temperature control FW 200 that can either be mounted to the heater or mounted to the wall beside the heater.  This module allows the heater to be set for different temperatures, zones and the time of day the heater comes on and goes off.  The FW 200 control also comes with a temperature probe that goes to the outside and detects and monitors the outside temperature and then allows the heater to remember the coldest and warmest times of the day and year.

The Greenstar condensing space heating boiler is specifically designed for space heating only but can also be used for Domestic Hot Water (DHW) when it is piped to an indirect tank and using a pump, aquastat and check valves.

New Bosch Greenstar Combi 131 Gas Fired Wall Hung Boiler

Bosch has just introduced a new Greenstar Combi 131 Gas-Fired Wall-Hung Condensing Boiler for space heating and DHW.  "Combi" (combination) unit with space heating and integrated water heating in one highly efficient, compact unit. With special insulation to ensure ultra quiet operation and the exclusive keypad safety lock feature to prevent unwanted tampering with heating controls, this unit is the ideal "green" upgrade for detached & terraced houses and is also suitable for apartments.

The Greenstar Combi 131 is simple to operate and some of the specifications include:

131.9K BTU 

AFUE rating of 95%

Delivers 3.2 GPM at 72 degree rise

3/4" Water connections

1" main heating connections

Can be vented with 2" or 3" PVC

3" PVC concentric vent kit available for vertical or horizontal installation

Telescopic Concentric Up and out vent kit available for horizontal installation 

The energy-savings and environmental features are:

Aluminum-Silicon heat exchanger delivers high efficiency with low temperature applications

Low NOx emissions ahead of 2012 SCAQMD regulations

Simple, intelligent control options optimize efficiency and fuel consumption

Low electrical consumption when the boiler is in standby mode

Electronic ignition

Anti-cycle and modulation control

These Greenstar Combi 131 condensing space heating boiler can be used for either Natural Gas or Liquid Propane installations.   The Greenstar units come preset for Natural Gas (NG), but can be converted to Liquid Propane (LP).  A gas conversion kit is included.

The Greenstar Combi units come with a temperature control FW 200 that can either be mounted to the heater or mounted to the wall beside the heater.  This module allows the heater to be set for different temperatures, zones and the time of day the heater comes on and goes off.  The FW 200 control also comes with a temperature probe that goes to the outside and detects and monitors the outside temperature and then allows the heater to remember the coldest and warmest times of the day and year.

All Greenstar Combi boilers are equipped with a high-strength stainless steel secondary exchanger and burner with double passage - ensuring consistent temperature output based on demand. The DHW hot water temperature control limit of 140°F helps prevent scale build-up within the heat exchanger.

Bosch Protankless C800ES Condensing unit

The Bosch Protankless C800ES Condensing tankless water heater is a top performance, fully condensing gas tankless water heater from Bosch. This 199,000 BTU heater is designed for residential applications and can deliver hot water up to 140 degrees F with a 10.5 GPM flow rate.  Not approved for space heating applications.

This Energy Star approved tankless water heater can produce enough hot water for 2-3 major applications in most homes.

Unlike traditional non-condensing models, condensing technology captures heat from the exhaust gas and uses it to preheat the incoming cold water. This increases efficiency and reduces emissions -- well ahead of the 2012 Low NOX emissions standards set by SCAQMD (California -- South Coast Air Quality Management District).

The Bosch C800ES features an electronic ignition system and can vent through either 3 inch or 4 inch diameter PVC vent pipe either through the side wall or up through the roof.  A 3" PVC concentric vent kit is available for venting vertical or horizontal and allows the unit to be vented and also have its intake air from the outside through one hole.

The Bosch C800ES does not come with the built-in Freeze Protection kit but it is available as an accessory.  The C800ES also does not come with an external water filter screen but is also available as an accessory.  The Bosch C800ES does come with a standard 3/4" PRV.  The Bosch Therm C 1050 ES tankless water heater is about the same as the C800ES except that it comes with the freeze protection kit.    The Bosch Integra 500 is also about the same as the C800ES and the C1050ES and it comes with the freeze protection, 3/4" PRV and the external water filter screen.  All three tankless heaters are 199,000 BTUs and have the same temperture rise. 

The freeze prevention kit is designed to provide protection for the water heater down to approximately 5°F for short term conditions only. It will not protect the appliance in areas where the temperature is routinely expected to be below freezing.  The freeze prevention kit will not protect plumbing outside the appliance from freezing.

The Bosch C800ES comes with a limited 15 year warranty on the heat exchanger and 5 years on all other parts.  Service and labor costs are not covered.

Bosch Evolution 500 Tankless Water Heater

The Bosch Evolution 500 Non-Condensing tankless water heater is a top performance, gas tankless water heater from Bosch. This 199,000 BTU heater is designed for residential applications and can deliver hot water up to 140 degrees F with a 9.4 GPM flow rate at a 35 degree rise.  Not approved for space heating applications.

This Energy Star approved tankless water heater can produce enough hot water for 2-3 major applications in most homes.

The Bosch Evolution 500 is almost the same as the Bosch Pro-Tankless GWH 715ES except that the GWH 715ES does not come with the freeze protection or an external water filter screen.  The Evolution 500 has a white cover and the 715ES has a silver cover.  Both heaters are 199,000 BTU and have the same temperture rise.

The Bosch Evolution 500 heater features an electronic ignition system and can vent through either 3 inch or 4 inch diameter stainless steel vent pipe either through the side wall or up through the roof. A stainless steel concentric side-wall venting option (ESHCK-Full-Kit) is available.

The Bosch Evolution 500 heater comes with built-in Freeze Protection and is almost the same as the Bosch 940ES tankless water heater except that it also comes with a 3/4" PRV and an External Water Filter.  The freeze prevention kit is designed to provide protection for the water heater down to approximately 5°F for short term conditions only. It will not protect the appliance in areas where the temperature is routinely expected to be below freezing.  The freeze prevention kit will not protect plumbing outside the appliance from freezing.

The Bosch Evolution 500, GWH 715ES and the 940ES are wholesale model heaters and sold to licensed plumbers and contractors.  The model Bosch 2700ES is a retail unit sold to end users that would be installing the heater themselves.  The Bosch AquaStar 2700ES is the same as the Bosch Evolution and features built in freeze protection and comes with a PRV and also an external water filter screen.

The Bosch Evolution 500 comes with a limited 15 year warranty on the heat exchanger and 5 years on all other parts.  Service and labor costs are not covered.

Bosch Greenstar Gas-Fired Condensing Boilers

Bosch has a new line of Greenstar Gas-Fired Wall-Hung Condensing Boilers and they are all very efficient and simple to set and operate.  Space heating boiler for connection to a hot water tank with unsurpassed performance and control. With special insulation to ensure ultra quiet operation and the exclusive keypad safety lock feature to prevent unwanted tampering with heating controls, this unit is the ideal "green" upgrade for detached & terraced houses and is also suitable for apartments.

There are 5 different model Greenstar Boilers designed for space heating only and they are sized by thier BTU capacity. 

• Bosch Greenstar 57, (57.2K BTU), 98.7% efficiency
• Bosch Greenstar 79, (79.2K BTU), 98.7% efficiency
• Bosch Greenstar 100, (100.8K BTU), 98.5% efficiency
• Bosch Greenstar 131, (131.9K BTU), 97.5% efficiency
• Bosch Greenstar 151, (151.6K BTU), 96.8% efficiency

The energy-savings and environmental features are:

Aluminum-Silicon heat exchanger delivers high efficiency with low temperature applications

Low NOx emissions ahead of 2012 SCAQMD regulations

Simple, intelligent control options optimize efficiency and fuel consumption

Low electrical consumption when the boiler is in standby mode

Electronic ignition

Anti-cycle and modulation control

These Greenstar condensing space heating boilers can be used for either Natural Gas or Liquid Propane installations.   The heaters come preset for Natural Gas (NG), but can be converted to Liquid Propane (LP).  A gas conversion kit is included.

The Greenstar boilers come with a temperature control FW 200 that can either be mounted to the heater or mounted to the wall beside the heater.  This module allows the heater to be set for different temperatures, zones and the time of day the heater comes on and goes off.  The FW 200 control also comes with a temperature probe that goes to the outside and detects and monitors the outside temperature and then allows the heater to remember the coldest and warmest times of the day and year.

The Greenstar condensing space heating boilers are specifically designed for space heating only but can also be used for Domestic Hot Water (DHW) when they are piped to an indirect tank and using a pump, aquastat and check valves.

New Bosch Tankless Universal Control Board

Bosch has released a new Universal Control Board (part number 87072073680) for their "World Two" tankless water heaters.

The board comes with three jumpers and instructions as to where to place those jumpers to make the board model-specific.

One jumper specifies if the heater is a 175,000 BTU or a 199,000 BTU appliance, another jumper specifies the gas type - NG or LP, and another jumper specifies if the heater has a surface-mounted outlet temperature sensor or is using a newer immersed sensor that is included on some recent production heaters.

Additionally, the world two universal control board is able to automatically determine if it is being used on a condensing or non-condensing tankless water heater.

This universal control board can be used on the following Bosch tankless water heaters for both natural gas and propane:

• C1050ES, C950ES, 940ES, 940ESO, 830ES
• C800ES, 715ES
• Integra 500, Evolution 500
• AquaStar 2700ES, AquaStar 2400ES

Call us at 866.289.4652 for more details or to place your order.

Bosch Integra 500 Tankless Water Heater

The Bosch Integra 500 Condensing tankless water heater is a top performance, fully condensing gas tankless water heater from Bosch. This 199,000 BTU heater is designed for residential applications and can deliver hot water up to 140 degrees F with a 10.5 GPM flow rate.  Not approved for space heating applications.

This Energy Star approved tankless water heater can produce enough hot water for 2-3 major applications in most homes.

Unlike traditional non-condensing models, condensing technology captures heat from the exhaust gas and uses it to preheat the incoming cold water. This increases efficiency and reduces emissions -- well ahead of the 2012 Low NOX emissions standards set by SCAQMD (California -- South Coast Air Quality Management District).

The Bosch Integra 500 features an electronic ignition system and can vent through either 3 inch or 4 inch diameter PVC vent pipe either through the side wall or up through the roof. A concentric venting option is available.

The Bosch Integra 500 comes with built-in Freeze Protection and is the same as the Bosch Therm C 1050 ES tankless water heater except that it also comes with a 3/4" PRV and an External Water Filter. The Integra 500 has a white cover and the Bosch C 1050ES has a silver cover.  Both heaters are 199,000 BTUs and have the same temperture rise. 

The Bosch C800ES is the same as the Bosch Integra 500 and the Bosch Therm C 1050 ES tankless water heater except that it comes with a 3/4" PRV and it does not come with built-in freeze protection.  The External Water Filter is optional, but recommended.  The freeze prevention kit is designed to provide protection for the water heater down to approximately 5°F for short term conditions only. It will not protect the appliance in areas where the temperature is routinely expected to be below freezing.  The freeze prevention kit will not protect plumbing outside the appliance from freezing.

The Bosch Integra 500 comes with a limited 15 year warranty on the heat exchanger and 5 years on all other parts.  Service and labor costs are not covered.

Greenstar Combi 100 & 151 Gas Fired Condensing Boilers

The New Bosch Greenstar Combi 100 (100K BTU) & Bosch Greenstar Combi 151 (151K BTU) Gas Fired Condensing Boilers are new to the American market but have been in use for years in Europe.  The combi 100 is 98.5% efficient as the combi 151 is 96.5% efficient.  The new Bosch Greenstar condensing boiler line is engineered to offer the ideal solution for residential heating and hot water needs at an affordable price, without compromising quality or fuel economy.

"Combi" (combination) unit with space heating and integrated water heating in one highly efficient, compact unit. With special insulation to ensure ultra quiet operation and the exclusive keypad safety lock feature to prevent unwanted tampering with heating controls, this unit is the ideal "green" unit.

Limited lifetime heat exchanger and 5-year parts & labor warranty

All models available as NG or LP

Special insulation ensures ultra-quiet operation

Compact dimensions and built-in frost protection offer flexibility for location of installation

ECO mode for energy saving fuel consumption

Exclusive safety feature - keypad safety lock prevents unwanted tampering with heating controls.

Each unit features an ASME approved Al-Si heat exchanger constructed of advanced Magnesium-Aluminum-Silicon alloy - offering increased flexibility versus traditional stainless steel. They are equipped with highly durable heating blocks that are corrosion resistant and designed to optimize clean burning combustion over an extra large surface area, which requires minimal servicing and reliance on spare parts during the boiler’s lifetime.  The Greenstar units come set for Natural Gas (NG) and there is a conversion kit that is included with the unit if it has to be converted to Liquid Propane (LP).

The Greenstar Combi units are designed for heating such as radiant floor heat or baseboard heating with multiple zones depending on the size of the unit and also for domestic hot water (DHW).  

The combi 100 unit besides being used for heating applications is also designed for DHW for 1 major application at a time - 72 degree rise at 2.4 gpm while the combi 151 could possibly do 2 applications at a time and will deliver - 72 degree rise at 4 gpm.

Depending on the size of your home and the heating and DHW applications you are looking for, you would need to get an HVAC or gas technician to size the unit properly as they would have to factor in,  size of home, insulation "R" factor, windows, etc..

Gas Conversion of Pro Gas Tankless Water Heaters

Some of the Bosch Professional gas tankless water heaters can be converted from one gas type to the next, i.e. from Natural Gas (NG) - Liquid Propane (LPG) and also from LPG - NG.  The Gas Conversion Kit, part #8719002176 includes a jumper for placement on the control board, a set of instructions for calibrating the gas and air mix and also some stickers to be placed on the heater stating it has been converted. 

The tools required for the gas conversion are:

• Flat and Phillips Screwdrivers
• #40 torx driver
• Digital CO2 Gas Combustion Analyzer
• This procedure must be performed by a licensed gas technician

The Bosch Professional Non-condensing heaters such as the 940ES/940ESO/830ES/715ES/635ES and the Evolution 500 CAN be converted using the gas conversion kit.

All of the Bosch Therm condensing heaters such as the C1210ESC/C1210ES/C1050ES/C950ES/C800ES and Integra 500 CANNOT be converted as the units have a special plate built into the burner tray.  This extra plate in the burner tray was designed and instlled to give the heater the ability to be installed at higher elevations up to 8000'.

Also the Bosch Therm 660EF/660EFO/520PN/520HN/425HN/425EF/330PN CANNOT be converted as they are not designed at all for gas conversion.

Bosch Therm Condensing Tankless Water Heaters

The top-of-the-line Bosch Therm Tankless Water Heaters feature a secondary condensing heat exchanger. This condensing heat exchanger is able to take the heat and energy that would be otherwise going up and out the exhaust pipe and channel that heat back into the water.

There are two main effects from this process. First, this process of reclaiming the heat before it goes out the exhaust boosts the thermal efficiency up by 10 percentage points from 82% to 92%. This means that you are paying less day after day to heat your home's hot water. Second, the heat taken out of the exhaust gases reduces the heat of the exhaust and thus allows the Bosch Therm condensing tankless water heaters to vent through PVC rather than through stainless steel. Of course, PVC is less expensive, so again the home owner saves money.

For example, the Bosch Therm C 1050ES condensing tankless water heater is a 199,000 BTU/hr maximum input unit with a 92% thermal efficiency. Not only can this heater vent out through PVC, but there is an optional concentric vent kit that can be used in either vertical or horizontal exhaust systems. In comparison, the Bosch Therm 940ES is also a 199,000 BTU/hr maximum input tankless water heater. But, as this heater does not have the secondary condensing heat exchanger it must vent through stainless steel vent pipe.

As expected, the Bosch C 1050ES costs more up front than the Bosch 940ES does. It is expected that after a few years of use the higher efficiency Bosch Therm C 1050ES will allow the home owner to recoup the higher up front capital cost.

The Bosch Therm condensing tankless water heaters all start with a "C" to indicate "Condensing." They are:

• Bosch Therm C 1210ESC (Commercial) 225,000 BTU
• Bosch Therm C 1210ES (Residential) 225,000 BTU
• Bosch Therm C 1050ES (Commercial or Residential) 199,000 BTU

Of these, the only heater that is Energy Star rated is the Bosch Therm C1050ES tankless water heater as it is below the 200,000 BTU level.

All of the Bosch Therm Condensing tankless water heaters come with a 15 year warranty on the heat exchanger and a 5 year warranty on all other parts. These heaters can only be sold to licensed installers and cannot be sold directly to home owners. They all feature an electronic ignition system and offer an optional remote control thermostat.

All three models are available in both natural gas and liquid propane and come with Bosch's patented burner design. And, they can be used in solar thermal, recirculation and space heating applications.

Call us at 866.289.4652 with your questions.

Global ProTankless Supply