Current DOE CCMS record

VIESSMANN CU3A-125 Boiler Specifications

Source facts reported to DOE for this exact model identifier.

Key specifications

DOE-reported brand
VIESSMANN
Exact model number
CU3A-125
Boiler class
Gas-fired hot water boiler
Input capacity
125,000 BTU/h
AFUE
95%
Standby power
6 W
Off-mode power
0 W

DOE source details

DOE basic model number(s)
CU3A-94

Source & freshness

DOE CCMS source page

Source snapshot retrieved: September 20, 2026

These records were reported to DOE. Appearance here is not a DOE compliance determination, independent test, or approval.