Bosch Wireless Remote Control TSTAT2

The Bosch Wireless Remote Control TSTAT2 for the Bosch Therm and Protankless models 635ES / 635ESO / 715ES / C800ES / C920ES / C920ESC / C830ES / C940ES / C940ESO / C950ES /    C1050ES / C 1210ES / C 1210ESC / Integra 500 / Evolution 500 allows you to program your Bosch tankless gas water heater to a comfortable and safe temperature from around your home from a distance of up to 98 ft.

The TSTAT2 remote is particularly useful if you own a jacuzzi or hot tub that requires a hotter water temperature than you normally desire for regular shower use.

Please note that the electrical control board of the older Bosch 635ES / 635ESO heaters must be removed and opened in order to install the wireless receiver circuit board to enable the use of the TSTAT2 Wireless Remote Control.

The Newer Bosch models, 715ES / C800ES / C920ES / C920ESC / C830ES / C940ES / C940ESO / C950ES / C1050ES / C 1210ES / C 1210ESC / Integra 500 / Evolution 500 tankless water heaters have been redesigned to make the installation of the wireless receiver circuit board much easier. The circuit board is basically a plug and play unit.

The TSTAT2 controls the temperature of your water heater and does not have a reset button.   If the heater has an error then a code will be on the display of the heater and the user has to go to the heater to reset it from there and should document the error and then see if it returns after resetting.

The TSTAT2 Wireless Remote Control for Bosch 635ES / 635ESO / 715ES / C800ES / C920ES / C920ESC / C830ES / C940ES / C940ESO / C950ES / C1050ES / C 1210ES / C 1210ESC / Integra 500 / Evolution 500 features the following:

• LCD displays temperature, error codes and functions
• Temperature measured in °C or °F
• Low battery level indicator
• 98 feet user range
• Alkaline AA LR6 2x1.5V battery power 915 MHz
• Security lock function
• IP X6 Protection
• Priority function - temperature cannot be modified by other user interface when water is running

Don't forget to periodically change the two AA batteries in your Bosch wireless TSTAT2 thermostat as they will certainly corrode over time. The batteries in TSTAT2 thermostats that are kept in bathrooms will corrode faster than in other less humid environments, such as kitchens. Your batteries should be checked yearly for any signs of corrosion and replaced every five years in any case.

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 SST Stainless Steel Indirect Storage Tanks for DHW

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 a Bosch SST Stainless Steel Indirect Storage Tank using a pump, aquastat and check valves.


Bosch SST Stainless Steel Indirect Storage Tanks for Domestic Hot Water come in four models ranging from 40 gallons up to 119 gallons:

• Bosch SST150-40 - 40 gallon storage tank; 115,000 Max BTUs
• Bosch SST250-65 - 65 gallon storage tank; 154,000 Max BTUs
• Bosch SST300-80 - 80 gallon storage tank; 171,000 Max BTUs
• Bosch SST450-119 - 119 gallon storage tank; 216,000 Max BTUs

SST, the new stainless steel line of domestic hot water indirect tanks, feature important enhancements such as a welded and passivated stainless steel tank and heat exchanger, and two-inch thick, high-density insulating foam with a tested R value of 13.4.


The Bosch SST Stainless Storage Tanks feature the following:

• 316L passivated stainless steel tank interior provides superior durability & longevity, offering resistance to the corrosive tendencies on domestic water
• 304L high capacity stainless steel coil efficiently transfers high volumes of BTU's from heat source to domestic water stored in the tank, making 1st hour delivery among the industry's best
• High density CFC/HCFC free polyurethane foam insulation yields the lowest stand-by losses in the industry
• State-of-the-art six axis programmable robotic welder uses computer guidance to accurately weld all stainless steel fittings and coil to the tank
• Warranty: limited lifetime tank & parts