3.3.9 EnEV Product Characteristics
Boiler efficiency factor at 100 % rating and at medi-
um boiler temperature 70 °C
97.5 % H
i
(87.8 % H
s
)
Boiler efficiency factor at 30 % rating and at return
temperature 30 °C
107.7 % H
i
(97.0 % H
s
)
Standby loss at 50 K above room temperature
0.33 % / 271 W
Installation and operating instruction
Gas condensing boiler WTC-GB 90-A
3 Product description
83266502 • 1/2010-08 • La
17-95
