The Bosch ProTankless Freeze Protection Kit, part number 7709003574, is an indoor supplemental freeze protection accessory designed to protect compatible Bosch ProTankless and Therm series tankless gas water heaters from freeze damage when the unit is installed in an indoor unheated location where ambient temperatures may drop to near-freezing levels during cold-weather periods.
The 7709003574 kit provides supplemental thermal protection for the internal components of the heater unit when installed in locations such as garages, attics, or crawlspaces where overnight ambient temperatures may fall to near-freezing levels during short-duration cold events.
The kit is rated to protect the heater unit against freeze damage in ambient temperatures down to 5°F above zero for short-term conditions only and is not designed to protect units installed in locations where temperatures routinely remain at or below the freezing point for extended durations. Supplemental plumbing insulation for all supply and return lines adjacent to the heater is required in conjunction with this kit.
What's Included: Bosch ProTankless Freeze Protection Kit 7709003574 with all components required for installation on compatible Bosch ProTankless and Therm series tankless gas water heater units. Supplemental pipe insulation for adjacent plumbing lines is not included and must be sourced separately.
Installation Limits: The 7709003574 kit is for indoor installations only and is not an outdoor freeze protection solution. The kit protects the heater unit only — it does not protect adjacent water supply lines, gas lines, or plumbing connections from freezing. Units installed in locations where ambient temperatures are expected to remain below freezing for extended periods must have all water drained from the unit as an additional precautionary measure regardless of this kit being installed. The kit does not eliminate the need for proper installation site selection.
Compatibility: The Bosch ProTankless Freeze Protection Kit 7709003574 is compatible with the Bosch Therm 830 ES Natural Gas (7703311076), Bosch Therm 830 ES Liquid Propane (7703411074), Bosch Therm 940 ES Natural Gas (7703311075), and Bosch Therm 940 ES Liquid Propane (7703411073) tankless gas water heaters available at RuralEnergy.com. Note that the Bosch Therm 830 ES and Therm 940 ES units include built-in freeze protection as a standard feature; this kit provides supplemental protection for installations in unheated indoor spaces where built-in freeze protection alone may be insufficient.
