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 Tronic 5000 WH17 & WH27

Bosch Tronic 5000 WH 17 & WH27 Electric Tankless Water Heaters

Ideal for replacing your electric storage tank water heater. The Bosch Tronic 5000 WH17 & WH27 electric whole house tankless water heaters are compact and powerful and can be installed virtually anywhere inside the home. Advantages include endless hot water, reduced electricity costs and substantial space savings.

Designed to replace a 20 - 40 gallon electric tank. The Bosch Tronic WH17 &  Bosch Tronic WH27 electric tankless water heaters are built to last. They have Plastic Polymer Modules and brass fittings. Each heater module is protected by an electro-mechanical thermal cut-out. If the temperature of any of the heater modules gets too high (over 195 degrees), then the cut-out will trip and cut the power to that heater module. If the cut-out trips, it must be reset while the circuit breakers are off. If you are not comfortable or qualified to perform this task, consult the original installer or a licensed electrician. This cut-out will only trip in exceptional circumstances. These small electric tankless water heaters can be installed virtually anywhere in the home and, of course, produce an endless supply of hot water.

There are many changes in the new Bosch Tronic 5000 WH17 and the WH27 compared to the older models Powerstream Pro RP17PT and RP27PT.

The new improvements for the Bosch Tronic 5000 WH17 and the WH27are:

• The units overall height is shortened by 4 inches due to reconstruction and placement of the main PCB board in the bottom of the unit.  (WH17 PCB Board #8-738-701-732, WH27 PCB Board #8-738-701-738).
• The Heating element assembly modules inside the unit have been redesigned to change the flow of the water in the modules to a different angle so as to not allow the mineral deposits to build up on the elements.
• There has been new single triac and dual triac PCB boards attached to the top of the heating modules as to give the heater more sensibility and maintain a more consistant heat.  (Single Triac PCB #8-738-701-733, Dual Triac PCB #8-738-701-723).
• The Thermal Cutouts on the top of the heating modules have been redesigned to trip at a little lower temperature of 195 degrees F to keep the elements from being damaged and overheating and hurting the piping and modules.

The minimum activation rate required for the unit to activate. (Activation rates: WH17 = 0.6 GPM, WH27 = 0.8 GPM).

The WH17 & WH27 are designed for cold potable water only. These water heaters are not designed for preheated water or recirculation applications. Increase flow rate where ever possible if water is coming out too hot.

Verify incoming water supply is at least 30psi. For people on well systems, the recommended pressure range is 30-50psi.

Maximum flow rates for each unit are as follows. WH17 = 2.3gpm, WH27 = 3.5gpm.

Bosch Therm C1210ES/ESC vs Bosch Pro GWH C920ES/ESC

Recently the Bosch Pro GWH C920ES/ESC was changed to the new model name Bosch Therm C1210ES/ESC. The model name was changed to reflect gallons per minute (gpm) at a 35 degree temperature rise. So the Bosch Therm C 1210 ES/ESC reflects a 35 degree temperature rise at 12.1 gpm. Along with this name change came many new features:

• Comes equipped with freeze prevention now.
• Has the capability to accept preheated water up to 140 degrees and is approved for Domestic Hot Water (dhw) and space heating applications in conjunction with an indirect tank.
• Has the ability to be cascaded using the Intelligent Cascade Kit for up to 24 units and would produce up to 290 gpm.

The Bosch Therm C1210 ESC commercial unit also has the ability to reach a maximum temperature of 180 degrees for commercial use.

The temperature range for the Bosch C1210ES is from 100 - 140 degrees. With the use of the Bosch Therm High Temperature Kit the unit would have the ability to reach up to 180 degrees.

Announcing Our New Bosch Contractor Web Site

We are very pleased to announce that we have just opened our new web site designed specifically for Contractors and Professional Installers. Check it out at www.prowaterheatersupply.com.

On this web site we sell the full line of Bosch Therm, Bosch Powerstream Pro and Bosch Ariston Pro Ti professional tankless water heaters. These Bosch products are designed for both residential and commercial applications and are only to be purchased and installed by licensed contractors.

Of course, we also carry the full line of Bosch tankless venting and accessories.

Call us at 866.289.4652 for special contractor pricing as we are only permitted to display List Pricing on this new web site.

We also sell 3" and 4" Z-FLex Z-Vent stainless steel venting on this web site as well as the Webstone and Cimberio Isolation Valve Kits needed for tankless water heater installations.

Global Pro Tankless Supply

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

Bosch Therm Tankless Product Number Changes

Recently Bosch has changed their naming strategy for the Bosch Therm line up of Tankless Water Heaters. Previously, the Bosch part numbers reflected the flow rate at a 45 degree F temperature rise; now the part numbers reflect the flow rate at a 35 degree F temperature rise.

So, for example, the legacy Bosch Pro 920ES is now the Bosch Therm  C 1210ES. This means that this heater can produce 9.2 GPM of hot water at a 45 degree F rise and 12.1 GPM at a 35 degree F rise.

This naming change was done, so it seems, to align Bosch with an emerging industry de facto standard of showing the flow rate at a 35 degree F temperature rise. In reality, showing the flow rate at a 45 degree F temperature rise made more sense as a 45 degree F temperature rise is more realistic average across the US. However, with other manufacturers advertising their heaters 35 degree F flow rate, it appeared that their tankless water heaters had a higher flow rate (which was of course not true).

So, now Bosch's published flow rates allow for easier comparisons to those of other manufacturer's heaters.

Bosch did make some upgrades to the new models, so actually the newer heaters have more capabilities than their older legacy heaters. More about those details in later blog entries...

Here is a brief listing of the name changes:

• Old: Bosch Pro 920ES  |  New: Bosch Therm C 1210ES
• Old: Bosch Pro 920ESC  |  New: Bosch Therm C 1210ESC
• Old: Bosch Pro 800ES  |  New: Bosch Therm C 1050ES
• Old: Bosch Pro 715ES  |  New: Bosch Therm 940ES & Bosch Therm 940ESO
• Old: Bosch Pro 425HN  |  New: Bosch Therm 520HN
• Old: Bosch Pro 425PN  |  New: Bosch Therm 520PN
• Old: Bosch Pro 260PN  |  New: Bosch Therm 330PN

The part numbers for the Bosch Electric whole-house and point-of-use tankless water heaters did not change, nor did the Ariston Pro Ti names change.

Call us for pricing on any of the new Bosch Therm Tankless Water Heaters at 866.289.4652.

Global ProTankless Supply