Humphrey Burner Nose for Preformed Mantle #9 Lights L12-2A

GlobaTowne has received new Humphrey Burner Noses for the Preformed Mantles L12-2A.  The new burner noses have been redesigned and are now made in metal.  The new burner nose is more durable and will last longer than the older ceramic burner noses.

Humphrey L12-2A Preformed Burner Nose

Please call GlobalTowne at 888-726-9752 with further questions or to order.

Bosch AQ1 Discontinued

The Bosch AQ1 side wall power vent kit has now been discontinued for several years. It is now completely unavailable. The AQ1 vent kit was used for Bosch AquaStar 125B tankless water heaters that were vented horizontally out the side wall.

The current replacement for the Bosch AquaStar 125B is the Bosch Therm 520PN. The 520 PN uses the AQ4 side wall power vent kit for all horizontal venting installations. No power vent kit is required when venting the 520 series tankless water heaters vertically up through the roof.

The AQ4 cannot be used as a substitute side wall vent kit for any Aqua Star125 tankless water heaters. The Bosch AQ4 can only be used for the Bosch Therm 520 series and the older Bosch 1600 series tankless water heaters.

Please call us with questions at 888.726.9752.

Bosch AquaStar 125B Replaced by Bosch Therm 520 Series

The Bosch Therm 520HN and the Bosch Therm 520PN Tankless Water Heaters are the direct replacements for the older Aquastar model heaters such as the 170VP, 125VP, 125B, 125X, 125HX and the 1600H & 1600P as well as the Bosch Protankless 425HN and 425PN.

Just like these older Bosch AquaStar tankless water heaters, the Bosch Therm 520 series are 117,000 BTU heaters that do not require any electricity. The Bosch Therm 520 PN has a standing pilot light and the Bosch Therm 520 HN uses Bosch's patented Hydrogenerator technology to start the water heater without electricity whenever the unit senses a demand for hot water.

Please be aware that if replacing an older model 125 series heater and the heater was vented out the sidewall of the home using the AQ1 powervent then you would need to order the new 520 series replacement heater and the new AQ4 powervent kit. The new model Bosch Therm 520 heaters are not compatable with the older AQ1 power vent kit and the AQ4 does require electricity.

The Bosch AquaStar 125B was designed to be vented up through the roof with 5" B-Vent. The Bosch 125B was replaced by the Bosch 1600P and the Bosch 425PN. All of these heaters were replaced by the 117,000 BTU Bosch Therm 520 PN.

The Bosch AquaStar 125HX was designed to be vented up through the roof with 5" B-Vent. The Bosch 125HX was replaced by the Bosch 1600H and the Bosch 425HN. All of these heaters were replaced by the 117,000 BTU Bosch Therm 520 HN.

GlobalTowne is an Authorized Bosch Distributor.

FX HOOD Terminator

GlobalTowne still has a few of the Bosch FX Termination Hood's (FXHOOD) left in stock.  These FX Hood's were used to vent the older Bosch 125FX and 240FX gas tankless water heaters.  The FX Hood is a 4" diameter termination hood for venting out the sidewall.  The FXHOOD had a flapper inside to keep the cold out when the unit is not in operation. The FX Hood is made of galvanized metal.

The current replacement for the Bosch Aquastar 125FX is the Bosch Therm 520PN with an AQ4 side wall vent kit.

Please call GlobalTowne with any questions or to order at 888-726-9752

Thermostats For Danfoss LX Electric Floor Mats

GlobalTowne carries a wide range of the Danfoss LX Electric Floor Heating Mats.  The mats come in either 110V or 240V.  There are 3 different thermostats for the Danfoss electric heating mats.  There are 2 programmable thermostats and 1 non-programmable thermostat. Please see the part numbers and specifications for each Danfoss thermostat below.

Danfoss LX Electric Thermostat 088L5133, (Non-Programmable):
Wall thermostat with Floor sensor, 40F to 104 F (5C to 40C)
15 amps (1800watts@120 or 3600watts@240)
4.65 x 3.0 x 1.9 inches

Danfoss LX Electric Thermostat 088L5130, (Programmable):
Wall thermostat with Floor sensor, 40F to 104 F (5C to 40C)
15 amps (1800watts@120 or 3600watts@240)
4.8 x 3.0 x 1.0 inches

Danfoss LX Electric Thermostat 088L5132, (Programmable):
Wall thermostat with Floor sensor, 40F to 104 F (5C to 40C)
15 amps (1800watts@120 or 3600watts@240)
4.8 x 3.0 x 1.0 inches

National Fuel's Western New York Conservation Incentive Program

The Conservation Incentive Program offers residential customers in National Fuel's western New York service area a number of money-saving rebates when they replace specified appliances with energy-efficient models.

There is a $700.00 rebate for all hot water boilers with an energy efficiency of .90 or higher.

There is a $375.00 rebate for all gas tankless water heaters with an energy efficiency of .82 or higher.

There is a rebate of $275.00 for all Indirect Bosch Stainless Steel Storage Tanks.

There is a rebate of $25.00 for the Bosch CRC100 & CRC200 Programmable Thermostat.

There is a rebate of $75.00 for the Bosch Wi-Fi Enabled Smart Controller.

Rebates are available for the following items listed below, providing they were installed on or after January 1, 2016.  All units are for Natural Gas (NG) and Liquid Propane (LP) unless otherwise specified.

Bosch Greenstar Boilers:
FS Combi 151, FS 151 Straight Boiler, WH Combi 151, WH 151 Straight Boiler, FS Combi 131, FS 131 Straight Boiler, WH Combi 131, WH 131 Straight Boiler, FS Combi 100, FS 100 Straight Boiler, WH Combi 100, WH 100 Straight Boiler, FS 79 Straight Boiler, WH 79 Straight Boiler, FS 57 Straight Boiler, WH 57 Straight Boiler.

Bosch Gas Tankless Water Heaters:
C1210ES, C1210ESC, C1050ES, C950ES, 940ES, 830ES

Takagi Gas Tankless Water Heaters:
TK-510C-NI, TK-310C-NI, TK110C-NI, T-D2-IN, T-D2-OS, T-D2U-IN, T-D2U-OS, T-H3J-OS, T-H3-OS, T-H3S-OS, T-K4-IN, T-K4-OS, T-K4U-IN, T-K4U-OS, T-KJr2-IN, T-KJr2-OS, T-KJr2U-IN-N, T-KJr2U-OS-N, T-M50-P, T-H3M-OS, T-H3-DV, T-H3S-DV, T-H3J-DV,

Marey Gas Tankless Water Heaters:
Power Gas GA16ETL, Power Gas GA16DP, Power Gas GA16, Power Gas GA10DP, Power Gas GA10, Power Gas GA5

Click here for more information on the National Fuel Conservation Incentive Program and to download the residential rebate application form.

NOTE: Rebates are available for existing single-family homes, multi-family homes, condominiums and mobile homes. New construction is not eligible for this program.

Inside Sales Position in Beachwood Ohio

Global Pro Tankless Supply currently has a new opening for an Inside Sales position in our Cleveland Ohio headquarters. We are located in Beachwood Ohio off of Chagrin Blvd near Richmond Road.

We are looking for a self-starter to join our growing company in the rapidly expanding field of Tankless Water Heater sales.

Prospective job applicants should have prior sales experience and be able to work well both on their own and in a team environment. The job requires excellent communication and organizational skills. A technical background is preferred as is prior experience with CRM software, such as SalesForce.com.

Please email your resume along with references to resumes@globaltowne.com.

GlobalTowne Management

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Alternate job titles:

Sales Representative
Sales Consultant
Sales Account Manager

Delta Temp Hydro-Pak Mini Rack Systems

GlobalTowne is pleased to announce we are now carrying the new Delta Temp Hydro-Pak Mini Rack Systems.  GlobalTowne offers 2 different models, Hydro-Pak 190-45 SS and the Hydro-Pak 140-45 SS.  These mini rack systems come in either Natural Gas (NG) or Liquid Propane (LP). These units are designed for residential and light commercial water heating applications.

Delta Temp Hydro-Pak Mini Rack System 190-45 SS
The Delta Temp Hydro-Pak Mini Rack System 190-45 SS is a rack system designed for high volume residential and light commercial applications. The Hydro-Pak Mini Rack System 190-45 SS Natural Gas (NG) or Liquid propane (LP) combines the benefits of tankless water heaters with a storage tank and pump to provide up to 525 gallons of hot water for the first hour of use and 480 gallons per hour thereafter at up to 8 gpm at a 35 degree temperature rise. When compared to the 32-38 gallon per hour rate of a standard 40-50 gallon tank, this Hydro-Pak Mini's high recovery rate and small footprint make it the ideal solution for all high volume residential and light commercial water heating applications.

The Hydro-Pak Mini Rack System 190-45 SS comes with a Takagi 190,000 BTU TK-4-IN tankless water heater that provides an endless supply of hot water to a 45 gallon Stainless Steel (SS) storage tank. The inclusion of the storage tank eliminates the pressure drop, ensures there is no cold water sandwich in the lines, and maintains a standby heat loss of .5 degrees or less per hour. The Astro 250 Stainless Steel pump ensures that the tankless heater's minimum activation rate is met and keeps the tank supplied with hot water.

Delta Temp Hydro-Pak Mini Rack System 140-45 SS
The Delta Temp Hydro-Pak Mini Rack System 140-45 SS is a rack system designed for high volume residential and light commercial applications. The Hydro-Pak Mini Rack System 140-45 SS Natural Gas (NG) or Liquid Propane (LP) combines the benefits of tankless water heaters with a storage tank and pump to provide up to 456 gallons of hot water for the first hour of use and 396 gallons per hour thereafter at up to 6.6 gpm at a 35 degree temperature rise. When compared to the 32-38 gallon per hour rate of a standard 40-50 gallon tank, this Hydro-Pak Mini's high recovery rate and small footprint make it the ideal solution for all high volume residential and light commercial water heating applications.

The Hydro-Pak Mini Rack System 140-45 SS comes with a Takagi 140,000 BTU TK-Jr2-IN tankless water heater that provides an endless supply of hot water to a 45 gallon Stainless Steel (SS) storage tank. The inclusion of the storage tank eliminates the pressure drop, ensures there is no cold water sandwich in the lines, and maintains a standby heat loss of .5 degrees or less per hour. The Astro 250 Stainless Steel pump ensures that the tankless heater's minimum activation rate is met and keeps the tank supplied with hot water.

Periodic Maintenance for Bosch 1600P/520PN & 1600H/520HN

The Bosch gas tankless water heater model numbers 1600P and 1600H should have annual and periodic maintenance done to prolong the life of the heater.  Bosch Thermotechnology is no longer making the retail models 1600P and 1600H but the new models that replaced them are the Bosch 520PN and the Bosch 520HN.  GlobalTowne carries parts for the Bosch 1600P/520PN and the Bosch 1600H/520HN.

As per the installation manual, the heaters should be checked annually for any debris in the venting, cleaning of the inlet filter screen and cleaning of the water valve.  The water valve should be cleaned with white vinegar and then the pushrod inside the water valve should be lubricated with plumbers grease or silicon grease.  The Bosch tankless water heaters should have a water valve rebuild done every 3 - 5 years depending on the quality of the water where the heater is installed.  The water valve rebuild kit (WVKITCT) #7738001923 includes the metal retaining plate, 2 set screws, pushrod and a packet of lubricant.  Call GlobalTowne at 888-726-9752 to order the water valve kit and other parts.

Below is a diagram of the water valve.  Service bulletins can be downloaded off the Bosch website at www.bosch-climate.us

Bosch External Water Filter

The Bosch external water filter part number 8703305356 replaces the existing smaller internal water filter screen inside certain Bosch tankless water heaters.  The external water filter allows for easy access to clean the inlet screen periodically.  Without the external water filter it is very difficult to get at the inlet screen inside the heater.  The Bosch external water filter is designed to be used for Bosch models 250SX/2400E/2400ES/2700ES.  The Bosch Integra 500/Evolution 500/2400ES/2700ES came with the external water filter.

The Bosch external water filter was also good for the older model Bosch heaters such as the older 635ES/635ESO/830ES/940ES/940ESO/C800ES/Therm C950ES/Therm C1050ES and C1210ES/C1210ESC

All of the newer model Bosch tankless water heaters 830ES/940ES/Greentherm C950ES/Greentherm C1050ES/ C1210ES/C1210ESC have the built in inlet filter screen.  See image below as it shows the inlet filter screen where the cold water connection is.

Bosch Tronic 6000C WH27 Replacing the Powerstar AE-125

GlobalTowne will now be offering the Bosch Tronic 6000C WH27 to replace the Powerstar AE-125. The original Powerstar AE-125 was a retail model heater but Bosch Thermotechnology is moving away from selling retail heaters.  The new model now will be the Bosch Tronic 6000C WH27.  The Bosch WH27 has almost the same features and physical dimensions as the Powerstar AE-125.  The Bosch WH27 now comes with a digital display on the front of the unit and also has a thermostatic control knob on the front.  Below are some of the specifications of the new Bosch Tronic 6000C WH27.

Please be aware that the Bosch Tronic 6000C WH27 requires the home to be equipped with at least a 200 amp service.
Bosch WH27 requires 3 - double pole 40 amp breakers
Requires 8 gauge wire
Activation flow rate of 0.8 gpm
Water pressure range is 15 - 150 psi
Thermal efficiency is 97 %
75 degree rise @ 2.4 gpm
60 degree rise @ 3 gpm
45 degree rise at 3.5 gpm

Water Valve Part Numbers for Older Bosch Aquastar 125 Series Gas Tankless Water Heaters

All of the older Bosch Aquastar 125 series model gas tankless water heaters are no longer made.  The Aquastar 125 series were distributed by Controlled Energy Corporation (CEC) over 8 years ago and CEC has sold the company to Bosch.  Below is a list of all the water-valves and their part numbers and all these valves are sold through GlobalTowne.  Please be aware of the serial number cutoffs for some of the water valves as they have changed over the years.

Aquastar 125B Water Valve: for heaters with serial number beginning with 380 or below: 8707002499 (8-707-002-499, 87070024990)

Aquastar 125B Water Valve: for heaters with serial number beginning with 381 and above: 8707002649 (8-707-002-649, 87070026490)

Aquastar 125BL Water Valve: 8707002478 (8-707-002-478, 87070024780)

Aquastar 125BS Water Valve: 8707002393 (8-707-002-393, 87070023930)

Aquastar 125BO Water Valve: 8707002708 (8-707-002-708, 87070027080)

Aquastar 125X Water Valve: 8707002810 (8-707-002-810, 87070028100)

Aquastar 125FX Water Valve: for heaters with serial number beginning with 380 or below: 8707002810 (8-707-002-810, 87070028100) This part replaces part number 8707002534.

Aquastar 125FX Water Valve: for heaters with serial number beginning with 381 and above: 8707006361 (8-707-006-361, 87070063610)

Aquastar 125HX Water Valve: 8707002649 (8-707-002-649, 87070026490)

Please visit our website at www.globaltowne.com for all spare parts.  Some of the Bosch Aquastar replacement parts are not listed so please call us at 888-726-9752.

Bosch Tronic 3000T ES2.5 Replacing the Ariston GL2.5S

GlobalTowne will now be offering the Bosch Tronic 3000T ES2.5 to replace the Ariston GL2.5S. The original Ariston GL2.5S was a retail model but Bosch Thermotechnology is moving away from selling retail heaters.  The new model now will be the Bosch Tronic 3000T ES2.5.  The Bosch ES-2.5 has the same features and physical dimensions as the Ariston GL2.5S.  Below are some of the specifications of the Bosch Tronic 3000T ES.25

Bosch ES2.5 Specifications:

Dimensions: 13 3/4" H x 13 3/4" W x 10 3/4" D

Thermal Efficiency: 98%

Tank Volume: 2.7 gallons

Electrical Requirements: 12amp/120Volts

Temperature Range: 65 degrees F - 145 degrees F

Black Friday Sale on Marey Tankless Water Heaters

GlobalTowne is having a Black Friday discount sale on certain Marey gas, propane and electric tankless water heaters.

No discount coupon or special savings code is needed to take advantage of this once-per-year special sale event.

The following six Marey tankless water heaters are marked down by 15% for a limited time that starts today and runs just through this weekend:

Marey ECO210
Marey ECO 240
Marey ECO 270

Marey GA5NG
Marey GA16NGETL
Marey GA16LPETL

GlobalTowne Staff

Delta Breez Ceiling Exhaust Fans

GlobalTowne is now carrying the Delta Breez ceiling exhaust fans.  DeltaBreez ventilation fans are ENERGY STAR® qualified and most have been designated ENERGY STAR Most Efficient 2015. All Delta Breez ventilation fans are HVI-certified, California Title 24 compliant, and UL-listed in both the US and Canada. Most DeltaBreez fans are ASHRAE 62.2 compliant as well.

BreezSignature ENERGY STAR qualified fans are solid, elegant ventilation solutions with motion-sensing, humidity-sensing, dual speed, or single speed options. The Signature fan energy efficiency exceeds ENERGY STAR requirements by as much as 685% and is quiet as a breeze with noise level ratings as low as .3 Sones.

BreezSlim ENERGY STAR® qualified fans offer extraordinary power and performance in a compact design. Made for wall or ceiling installation, the slim is perfect for retrofitting or new installation with space constraints. At only 1.0 Sone, the Slim is the quietest fan of its size.

The BreezSmart Series incorporates Delta’s super reliable DC brushless motor at higher CFMs with adjustable humidity, adjustable low speed, motion sensing, and a delay timer. The BreezSmart Series delivers 130 CFM and 150 CFM at incredibly low noise, .3 Sones, while consuming less than 18 Watts of power.

BreezGreenBuilder ENERGY STAR qualified fans are remarkably energy-efficient with the use of DC motors. The GreenBuilder fan exceeds the ENERGY STAR efficiency requirement by as much as 835% and has attained the lowest noise level rating available of .3 Sones.

DeltaBreez ceiling exhaust ventilation fans are available with or without lights, LED lights, humidity sensors and motion sensors.

The first three letters of the part number indicate the DeltaBreez Series (e.g., SIG indicates the BreezSignature Series); the number following the Series indicates the CFM; an 'L' if present indicates a standard light; an 'LED' if present indicates an LED light, an 'H' if present indicates a humidity sensor; and an 'M' if present indicates a motion sensor.

DeltaBreez Ceiling Exhaust Fans

Please visit the link below to view all the Delta Breez exhaust fans that we carry:



Delta Breez Ceiling Exhaust Fans





Bosch AquaStar Universal Hydro Generator

The Bosch Universal Hydro Generator, part number 8707406104 (87074061040 or 8-707-406-104-0) is designed to work with all newer Bosch Therm 520HN tankless water heaters as well as all older model hydro generated units.  The universal hydro generator comes with miscellaneous water pipes, gaskets and bushings to adapt to the older units. The hydro generator works with water flow and has a small wheel that spins when the water starts to flow. The small wheel inside has a magnet on it that when spinning produces a certain amount of mili volts that is transferred through a couple wires to the ignition unit and that in turn lets the ignition unit light the pilot and then the main burner.  There is no need for any electrical power to operate the heater.

The older units that would require the universal hydro generator are the Bosch model 125HX, 425HN, 425HNO, 1600H and the Bosch WR400 series heater WR400-7K V1G23S3195.  The new universal Hydro Generator part replaces all older hydrogenerators such as 8707406043 (87074060430 or 8-707-406-043-0), 8707426026 (87074260260 or 8-707-426-026-0), 8707406059 (87074060590 or 8-707-406-059-0), 8707406069 (87074060690 or 8-707-406-069-0), 8707406095 (87074060950 or 8-707-406-095-0) and 8707406071 (87074060710 or 8-707-406-071-0).

3" Z-Flex Stainless Steel Venting for Marey 16L ETL Tankless Water Heater

GlobalTowne carries all the 3" stainless steel Z-Flex venting needed for venting the Marey 16L ETL tankless water heater.  The Marey 16L ETL gas tankless water heater must be vented with 3" single wall stainless steel venting.  Please be sure that when installing the Marey 16L ETL that you start with the 3" Universal Adapter part number 2SVSNA03.5 on top of the heater.  The universal adapter makes for a much easier installation and is needed for attaching the 3" stainless steel venting. 

The Marey 16L ETL is a direct vent unit and must be vented to the outside.  The Marey 16L ETL cannot be common vented or vented into a chimney.  The Marey 16L ETL can be vented horizontally out the sidewall or vertical up through the roof.  If venting horizontal out the sidewall make sure to angle the venting a 1/4" per foot.  When venting vertical up through the roof you must use a Vertical Condensate Drain Tee part number 2SVEVWCF03 and a Condensate Drain Tube Kit 24" part number 2SVEDTK24.

New Humphrey Gas Light Replacement Parts

Globaltowne has now added more replacement parts to our website.  We carry a full line of Gas Lights, Half Frosted Globes, Preformed and Tie-On Mantles, etc.  Globaltowne now carries some replacement parts such as the street elbow, wall plate assembly, heat deflector and more.  Please see the items and part numbers listed below.

Heat Deflector #L5-17

Wall Plate Assembly #L8-6C

Street Elbow Pipe Fitting #L22-23A

3/8" x 1/8" fitting #L22-12A

Please call us at 888-726-9752 for further questions about the Humphrey Gas Light products or visit or website at www.globaltowne.com  

Replacing a Bosch Aquastar 125FX with a Bosch Therm 830ES

The older Bosch Aquastar model 125FX came in either Natural Gas (NG) or Liquid Propane (LP) and was 117,000 BTU and was a direct vent unit that was good for one major application at a time.  The 125FX had electronic ignition and was fan-assisted and took its combustion air from the room it was installed in.  The heater had a built-in fan so the heater could be vented right out the sidewall of the building.  The Aquastar 125FX had to be vented with 4" sealed stainless steel venting going a maximum of 15' out the sidewall of the building into the FXHood.  The FX Hood was a termination hood specifically designed for the 125FX and had a built-in flapper to keep cold air from penetrating the vent pipe and freezing the heater.  The Bosch Aquastar 125FX is discontinued now and has not been made for over 8 years or so.  One of the closest replacement models for the 125FX would be the new Bosch Therm 830ES.

Bosch Therm 830ES

The new Bosch 830ES comes in either Natural Gas (NG) or Liquid Propane (LP) and is 175,000 BTU which is slightly more BTUs than the older 125FX.  The Bosch 830ES needs a minimum of a 3/4" gas line and has 3/4" water connections also.  The 830ES is a sealed unit and takes its intake air from the outside using 3" PVC.  The unit is vented to the outside using 3" Stainless steel venting and this could be attached to the FX Hood that is already in place using a 3" to 4" increaser (Z-Flex Part #2SVSI0304).  The 830ES is digitally controlled and can go from 100 - 140 degrees F.  See below for more specifications and capacity.

Therm 830 ES	Specifications
Condensing/Non-Condensing	Non-Condensing
Application	Residential or Commercial
Max Input (BTU)	175,000
Min Input (BTU)	19,900
Capacity at 35°F Rise (gpm)	8.3
Capacity at 55°F Rise (gpm)	5.3
Intelligent Cascading	Yes
Min Flow Rate	0.5 gpm
Temp Range (°F)	100 - 140
Temp Stability (°F)	+/- 2
Default Temp (°F)	122
Energy Factor	.82
Thermal Efficiency	82%
Installation Options	Indoor or Outdoor (for outdoor, kit required)
Dimensions (w x h x d)	17 7/8" x 31½" x 11¼"
Weight (lbs.)	67
Inlet Connection	¾" NPT
Outlet Connection	¾" NPT
Gas Connection	¾" NPT
Max Water Pressure	150 psi
Min Water Pressure	30 psi
Min NG Presure	3.5" WC
Condensing Heat Exchanger	n/a
Venting Options	Stainless Steel
Vent Maximun Run	61.25'
Energy Star Rated	Yes

Outdoor Installation of Bosch 330PN, 520PN & 520HN

In past years, Bosch had always had naturally drafting gas tankless water heaters that were specifically designed for the outdoors.  The 117,000 BTU Bosch 125BO and 425HNO outdoor units were designed for outdoor use; however, they were discontinued about three years ago.  The Bosch 125BO and the 425HNO did not require any power to operate and were naturally drafting. They also did not require any venting. (These heaters did come with a power cord, but the power cord was only to provide for freeze protection and was not required for the regular operation of the water heater.)

The only outdoor Bosch tankless water heaters that are currently available are direct vent units and they require power to operate and have a special outdoor vent cap (BTOK) to protect them from the elements.  These specific outdoor units also have built-in freeze protection that is good for ambient freezes for short periods of time.

Bosch does still offer three different naturally drafting gas tankless water heaters that do not require any power to operate and are intended for indoor use but can be installed outside under special situations. The Bosch 330PN, Bosch 520PN and the Bosch 520HN are all naturally drafting units that require no power to operate.  These units come in either Natural Gas (NG) or Liquid Propane (LP). 

These units can be mounted outside if they are well protected from the elements and are able to get plenty of combustion air when in operation (See Image below of Bosch 330PN LP installed outdoors on a tree).  The 75,000 BTU Bosch Therm 330PN and the 117,000 BTU Bosch Therm 520PN and 520HN tankless water heaters will not be covered under any manufacturer's warranty if the unit freezes or if the heater gets damaged by rain.  Bosch Thermotechnology may void any warranty for the heater at their discretion as the Bosch 330PN, 520PN and the 520HN are intended for indoor applications.

This photo shows the Bosch 330PN-LP installed in a protected case with a sloped roof. The case is open on the bottom to allow for the easy flow of make-up air.

This photo shows the 330PN-LP from the front view with a hinge on the custom-built case that allows for easy access to the tankless water heater's controls.