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.

Venting a Bosch Therm 330PN into an Existing Chimney

The Bosch Therm 330PN is a naturally drafting gas tankless water heater and must be vented to the outside using a minimum of a 4" diameter galvanized type B gas vent.  Under no circumstances should the vent pipe be reduced in size.  There must be a minimum of a 12" rise off the top of the heater before any 45's or 90 degree elbows.  If there is to be a horizontal section before going into the chimney then try and keep it as short as possible.  The maximum horizontal run allowed is half of the total vertical vent height.  45's, 90 degree elbows and any horizontal length is not to be considered in the total gas vent height.

The Chimney the Bosch 330 PN tankless water heater is venting into must be the only thing going into the chimney.  The galvanized type B gas vent must run all the way up the chimney to an approved rain cap.  The minimum vertical vent height is 6 ft and any horizontal vent connectors or elbows are not to be considered in the total gas vent height.  All gas vent sections of pipe must be screwed together with sheet metal screws and properly supported.  The Bosch 330 PN may be vented into the chimney alone as long as it is lined with the correct tile or metal ling.  Consult local codes for proper lining of chimney.  You may not vent any other fuel burning appliances into any free space remaining in the chimney.  Please see the illustration below for venting into the chimney and always follow the instructions listed in the installation manual for the heater.

A = Minimum of 6 ft. rise
1.  Listed approved Rain Cap
2.  Horizontal vent connection rising 1/4" per ft.
3.  Establish a 12" rise before any elbows

Venting a Bosch Therm 520PN or 520HN into an Existing Chimney

The Bosch Therm 520PN and Bosch Therm 520HN are both naturally drafting gas tankless water heaters and must be vented to the outside using a minimum of a 5" diameter galvanized type B gas vent.  6" diameter type B gas vent is required for all installations over 2,000 ft above sea level.  Under no circumstances should the vent pipe be reduced in size.  There must be a minimum of a 12" rise off the top of the heater before any 45's or 90 degree elbows.  If there is to be a horizontal section before going into the chimney then try and keep it as short as possible.  The maximum horizontal run allowed is half of the total vertical vent height.  45's, 90 degree elbows and any horizontal length is not to be considered in the total gas vent height.

The Chimney the Bosch tankless water heater is venting into must be the only thing going into the chimney.  The galvanized type B gas vent must run all the way up the chimney to an approved rain cap.  The minimum vertical vent height is 6 ft and any horizontal vent connectors or elbows are not to be considered in the total gas vent height.  All gas vent sections of pipe must be screwed together with sheet metal screws and properly supported.  The masonry chimney may have to be tile or metal lined before the insertion of the gas vent pipe.  Consult local codes for proper lining of chimney.  You may not vent any other fuel burning appliances into any free space remaining in the chimney.  Please see the illustration below for venting into the chimney and always follow the instructions listed in the installation manual for the heater.

A = Minimum of 6 ft. rise
1.  Listed approved Rain Cap
2.  Horizontal vent connection rising 1/4" per ft.
3.  Establish a 12" rise before any elbows

Dimensions of Ariston "S" Series Mini-Tank Heaters with T&PRV Installed

This is to provide an estimated dimension for the overall height of the Bosch Ariston "S" series mini-tank water heaters with the Temperature and Pressure Relief Valve (T and PRV Valve) installed.  There are 3 different models of the "S" series mini-tank heaters.  There is the model Ariston GL2.5S and holds 2.7 gallons of hot water, the Ariston GL4S and holds 4 gallons of hot water and then the larger Ariston GL6+S which holds 5.1 gallons of hot water installed vertical and around 7 gallons of hot water if water connections attached to the right side going horizontal.

Below is a list of the 3 Ariston min-tank water heaters dimensions overall and also height dimension with the T and PRV installed.  Please always try and leave room for maintenance and water pipes on the top (Top and Right Side for the GL6+S).

Ariston GL2.5S:
Unit Dimension:  13.75"W x 13.75"H x 10.75"D
Overall Height w/T and PRV installed:  13.75"W x 17"H x 10.75"D

Ariston GL4S:
Unit Dimension:  13.75"W x 13.75"H x 13.5"D
Overall Height w/T and PRV installed:  13.75"W x 17"H x 13.5"D

Ariston GL6+S Installed Vertically:
Unit Dimension:  17.5"W x 17.5"H x 14.5"D
Overall Height w/T and PRV installed:  17.5"W x 20.75"H x 14.5"D

Ariston GL6+S Installed Horizontally:
Unit Dimension:  17.5"W x 17.5"H x 14.5"D
Overall Width w/T and PRV installed:  20.75"W x 17.5"H x 14.5"D

The Ariston GL6+S does not come with a power cord.  The power cord is sold seperately.

Replacing Older Bosch Tankless with The Bosch Therm 830ES

The Bosch Therm 830ES Non-Condensing tankless water heater is a top performance, gas tankless water heater from Bosch. This 175,000 BTU heater is designed for residential applications and can deliver hot water up to 140 degrees F with a 8.3 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 major applications in most homes.

The Bosch Therm 830ES 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 also available.

The Bosch 830ES heater comes with built-in Freeze Protection but it does not come with the 3/4" PRV and the 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 Therm 830ES is a wholesale model heater and sold to licensed plumbers and contractors.  The new Bosch Therm 830ES is a close replacement for older models such as the Bosch 250SX/250SXO, 635ES/635ESO and the 2400E.  Please be aware the 830ES is 7" taller, 2.375" wider and 2.75" deeper than the previous models. The Bosch 830ES is a direct replacement for the Bosch 2400ES.  For outdoor installations the Bosch 830ES would require the BTOK Outdoor Kit.

The Bosch Therm 830ES 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.

Webstone Isolation Service Valve's

Globaltowne carries a wide range of Webstone Isolation Service Valves for all tankless water heaters. There are many different types of Webstone valves ranging from complete kits to long valves and short valves to complete any tankless water heater installation.

The Webstone Isolation valve set pictured is a Lead-free Isolation Valve Kit for All Bosch Gas Tankless Water Heaters (44443WPR) comes with separate hot and cold isolation valves and a Pressure Relief Valve. Easy two-step installation of your tankless water heater with unsurpassed safety, features and benefits. This is a complete inlet/outlet valve system that provides everything you need for a secure installation, including full port testing and flushing of the system with easy-to-install union connections.

Bosch Gas & Electric Residential Tankless Water Heaters 2015 NAECA Standards

The U.S. Department of Energy has increased the energy factor requirements for residential water heaters effective April 16th, 2015 through the National Appliance Energy Conservation Act (NAECA).

This update of regulations will affect all manufacturers selling residential water heaters in the U.S. Residential water heaters include storage type units that store heated water in an insulated tank and instantaneous type units that heat water on demand.

These standards only apply to gas fired storage (<=75 kBTU/h input), oil-fired storage (<=105 kBTU/h input), tabletop storage (<=12kW input), all electric (<=12kW input), and instantaneous gas (<200 h="" input="" kbtu="" p="">

Impact of NAECA standards:
Increased Energy Factor ratings on almost all residential water heater technologies and sizes will impact manufacturers, wholesalers, contractors, and end users.

Impact on Products:
Gas tankless water heaters:  Increased Energy Factor requirements will only allow models with EF 0.82 and over to be manufactured as of April 16th. Models operating at or over EF 0.82 will not be affected. Most of Bosch’s tankless water heaters fall in this category of EF over 0.82.

Impact on Wholesalers and Contractors:
These NAECA regulations will affect wholesalers and contractors and it is important to note these forthcoming changes. Tankless products may be a more suitable alternative in certain applications. Tank-type gas water heaters >55 gal. may require line voltage and condensate disposal. In addition, HPWH technology will be required in electric tank-type >55 gal.

Anti Freeze Prevention Kit for Bosch 1600P & 1600H

The Bosch Freeze Prevention Kit, part number 7709003775 is sold as an accessory and is approved for the Bosch 1600P/1600H/520PN & 520HN tankless water heaters.  The Freeze Protection Kit is designed to provide protection for the water heater down to approximately 5 degrees F for short term conditions only.  Power is required for the freeze prevention kit and plugs directly into a 110V outlet.   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.  Precautions should be taken to prevent this.

For more information and to order the Bosch 1600/520 Freeze Protection kit please call us at 888-726-9752.

AQ1 Powervent Kit Obsolete

The Bosch AQ1 Powervent kit is now obsolete.  This powervent kit was designed and used for the older Bosch models:  125VP/170VP/125B/125HX/125X/125BS and 125BL heaters.

Bosch still has some parts in stock for the AQ1 powervent kit such as the Blower motor part #7738001022. Stock for the individual parts for the AQ1 powervent kit will only be available for a limited time as supplies last.  Please call us at 888-726-9752 for pricing and availability for individual parts.

Bosch replaced the AQ1 powervent kit with the newer AQ4 Powervent Kit and this new powervent kit will only work with the following Bosch tankless water heaters:  1600P/1600H/520PN/520HN.  The Bosch AQ4 powervent kit is different than the older AQ1 powervent kit and operates with a flow switch to activate the blower motor instead of the gas pressure switch in the older AQ1.