Supplementary Document

Key benefits to consider Bosch Therm tankless Gas storage tank water heater
Provides endless hot water on-demand?
Yes No
Compact, easy access and 100%
serviceable parts?
Yes No. Tanks are usually just replaced
Built-in digital control panel with precise
2°F temperature increments?
Yes No. High to low setting
Maintains efficiency over the life of
the product?
Yes
No. Sediment builds-up inside
the tank with each use
Reduces opportunity for bacteria growth
Yes. There is minimal
standing water to grow bacteria
No. Stored warm water mixes with sediment
and is a breeding ground for bacteria
Fully modulating “vertical” burner that
works on demand only?
Yes. A Bosch exclusive
No. Uses a single burner that operates
with or without hot water demand
How much heat and energy is wasted in
the exhaust?
Bosch dual heat exchangers minimize waste
and optimize efciency - up to 98%
Heat rises and energy is wasted
through the ue at around 78% efciency
Estimated to last 20+ Years?
Yes No. Replace every 6-12 years
11 | 2011 Commercial water heating solutions
HOT WATER COLD WATER
MAX EXHAUST 150° F
CONDENSING
HEAT EXCHANGER
COMBUSTION GAS
PRIMARY HEAT EXCHANGER
Bosch condensing tankless water heaters are engineered to operate at up to
98% efficiency when North American hot water demands are most common.
The Bosch C 1210 ESC, C 1050 and C 950 series gas tankless water heaters
are ultra efcient fully condensing water heaters. Unlike traditional non-
condensing water heaters, a condensing unit captures latent heat from
condensation of the exhaust gas and uses it to preheat the incoming cold
water, making Bosch condensing tankless water heaters 10% more efcient
than a traditional tankless water heater.
As seen on the chart below, this smart technology ensures maximum
performance and energy efciency during normal usage. This is a critical
difference in Bosch technology and something we think you should understand
because some tankless products advertise high efciencies based on less
common ow situations. With Bosch you know exactly what you are buying.
Efficiency %
GPM
100
98
96
94
92
90
88
86
84
82
80
0 0.65 1.30 1.95 2.6 3.25
Smart Bosch
technology delivers
up to 98% efficiency
when you need it most
Benchmark - efficiency results
Bosch Tankless
Other Tankless
90% of hot water
draws and 75% of
total water usage
occur in this area
Based on 120°F Set Point,
105°F Usage Temperature