Page 22 - Fast Forward to a Sustainable Future

Plug and play. Design
improvements make it
possible to install a
Greentherm 9000 unit at
a speed rivaling most
tank-style water heaters.

CREDIT: BOSCH THERMOTECHNOLOGY CORP. CREDIT: BOSCH THERMOTECHNOLOGY CORP. Hot topics. Greentherm’s

Energy Factor of 0.99 and
Thermal Efficiency rating
of 100 percent are tops
among gas condensing
tankless water heaters.

tankless condensing water heater market for several years. Navigant which is optional on some other models, allows easy plug-and-play
estimates that tankless unit sales in the U.S. will increase by nearly installation of a home recirculation system. This also provides faster
75 percent—from $399 million in 2015 to $698 million by 2020. delivery of hot water to outlets, and prevents up to 11,000 gallons of
water per year from being wasted. Because no dedicated hot water
GOING WITH GREENTHERM recirculation return line is required, this model can be installed in
The Bosch Greentherm 9000 Series offers nine gas-fueled models for virtually all existing homes.
high-efficiency, Energy Star-rated hot water generation in residential
applications. These units were designed to surpass federal minimum
energy-efficiency requirements and offer top-level performance,
comfort and homeowner control.
Greentherm’s EF of 0.99 is the industry’s highest, as is its 100
percent Thermal Efficiency rating. A user will typically save up to 40
percent in annual energy costs versus using a tank-type water heater.
A general shortcoming of tankless-type units has been the ability of CREDIT: BOSCH THERMOTECHNOLOGY CORP.
the unit to keep up with hot water demand when multiple devices—
such as a washing machine, dishwasher and shower—are running at
the same time. Greentherm’s advanced technology solves the problem
by seamlessly controlling output capacity. This optimizes comfort and
efficiency by combining the burner’s pulsating mode with the bypass Power up. Top-mounted cold- and hot-water connections make
valve to achieve the desired outlet temperature, even at low flow rates. the indoor Greentherm 9000 unit easier to install when replacing a
Its wide operating range—between 9,000 and 199,000 Btu—saves tank-style water heater.
energy when hot water demand is low by eliminating short cycling. Greentherm units are expected to last far longer than their tank-
The new Greentherm units also offer integrated Wi-Fi control—an type counterparts. While a conventional water heater typically
included feature on the 9000i SE model and an option with the other requires replacement every 7 to 10 years, the tankless model could
models—allowing owners to control water heater functions via a free last up to 20 years with recommended annual maintenance. The
mobile phone app and receive live performance monitoring, real-time lifespan is aided by a primary copper heat exchanger and a secondary
remote diagnostics and troubleshooting notifications. stainless steel unit to minimize scale buildup.
An active bypass provides superior temperature stability and
eliminates the need for a buffer tank, even with varying flow rates IN AND OUT IN A FEW HOURS
and supply-water temperatures. Water temperature is maintained Other features of the Greentherm 9000 Series makes life easier
at plus or minus two degrees Fahrenheit due to the active bypass for installers—a primary goal during product development,
function. according to Freddie Molina, tankless product manager at Bosch
A standard built-in recirculation pump in the 9000i SE model, Thermotechnology Corp.

22 FAST FORWARD TO A SUSTAINABLE FUTURE