CondensingENERGY STAR
NHB-110 Heating Boiler
by Navien · NHB Heating Boiler series
4.6(74)
Efficiency
95%
AFUE
Output
104k
BTU/hr
Turndown
15:1
modulation
Warranty
12
yr exchanger
The NHB-110 Heating Boiler is a condensing boiler best suited for radiant and baseboard systems needing fine modulation. It delivers 95% AFUE efficiency with a 15:1 turndown ratio, backed by a 12 years heat-exchanger warranty.
Key features
- Industry-leading 15:1 turndown
- Compact heat-only
- Cascade up to 16
Technical specifications
Boiler typeCondensing
FuelNatural Gas
AFUE efficiency95%
Heat input range9,000 – 110,000 BTU/hr
Heat output104,000 BTU/hr
Turndown ratio15:1
VentingDirect vent (PVC/CPVC)
Dimensions (H×W×D)28" H × 17" W × 12" D
Weight73 lbs
ENERGY STARCertified
Warranty coverage
Heat exchanger
12 years
Parts
5 years
Labour (via installer)
1 year
Installed price range
$4,200 – $5,600
Unit only: $2,600 – $3,200
≈ $83/mo · 60 mo @ 6.99% APR
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For the NHB-110 Heating Boiler
NHB-110 Heating Boiler reviews
4.0
· 1 reviewsVerified
15:1 turndown is great
The NHB heat-only modulates incredibly low which is perfect for milder days. Pairs well with our indirect tank.
Rachel N. · Edmonton, AB · Jan 2026