CommercialENERGY STAR
Vitocrossal 300 CU3A
by Viessmann · Vitocrossal series
4.7(22)
Efficiency
95%
AFUE
Output
302k
BTU/hr
Turndown
4:1
modulation
Warranty
10
yr exchanger
The Vitocrossal 300 CU3A is a commercial boiler best suited for strata, light commercial, and large estates. It delivers 95% AFUE efficiency with a 4:1 turndown ratio, backed by a 10 years heat-exchanger warranty.
Key features
- Floor-standing condensing
- Inox-Crossal exchanger
- Cascade-ready
Technical specifications
Boiler typeCommercial
FuelNatural Gas
AFUE efficiency95%
Heat input range75,000 – 318,000 BTU/hr
Heat output302,000 BTU/hr
Turndown ratio4:1
VentingDirect vent (PVC/CPVC)
Dimensions (H×W×D)49" H × 22" W × 38" D
Weight386 lbs
ENERGY STARCertified
Warranty coverage
Heat exchanger
10 years
Parts
5 years
Labour (via installer)
1 year
Installed price range
$13,000 – $19,000
Unit only: $9,500 – $13,000
≈ $257/mo · 60 mo @ 6.99% APR
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For the Vitocrossal 300 CU3A