A O Smith UB70 G vs Atmos Atmos Compact System Boiler N30B

Detailed side-by-side comparison of efficiency ratings, specifications, and performance

A O Smith UB70 G

A O Smith

89.5%

Atmos Atmos Compact System Boiler N30B

Atmos

89.4%

Efficiency & Performance

89.5%

89.4%

60.1 - 60.1

24.5 - 24.5

Gas

Conventional

Technical Specifications

Open or Room-Sealed

Room-Sealed

Condensing

Fan Assisted

2011 - current

1997 - 2006

Cost & Savings

£150-£300

Free (ECO4)

Comparison Summary

Efficiency Winner

A O Smith UB70 G

Best Value

Both boilers are available free through the ECO4 scheme

Ready to Get Your Free Boiler?

Both A O Smith UB70 G and Atmos Atmos Compact System Boiler N30B are available free through the ECO4 scheme. Check your eligibility and apply today.