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Navien NFB-H Series 199K BTU - High Capacity - Condensing Fire Tube Boiler - 95%
Original price was: $1,398.00.$699.00Current price is: $699.00.
Navien NPN-E Series 199 MBH Outdoor Non-Condensing Propane Gas Tankless Water Heater
Original price was: $998.00.$499.00Current price is: $499.00.
Navien NHB-H Series 55 MBH – High Efficiency Condensing – Heating Boiler
Original price was: $1,398.00.$699.00Current price is: $699.00.
Seasonal Sale — Limited-Time Savings
- 55,000 BTU/h input with 95% AFUE condensing efficiency
- Deep modulation for small, low-heat-loss spaces
- Low-NOx burner meets strict emissions requirements
- Heating-only design, pairs with an indirect DHW tank
- Direct-vent sealed combustion, no chimney required
- Natural gas or propane operation
- Compact 24 in. indoor wall-mount cabinet
- ENERGY STAR qualified, 120V electronic ignition
| Weight | 66 lbs |
|---|---|
| BTU | 55000 |
| MBH | 55 |
| AFUE | 95 % |
| ANSI | ANSI Z223.1 |
| ASME | ASME H |
| Depth | 24 in |
| Volts | 120V |
| Width | 17 in |
| Height | 24 in |
| Length | 12 in |
| Emission | Low NOx |
| Material | Carbon Steel / Stainless Steel |
Order today — Ships in 1–3 business daysEstimated delivery: 3–8 business days
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Product Highlights
Professional Grade
Built for reliable, repeated use.
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Product information verified against manufacturer specifications.
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Ships from our configured U.S. fulfillment network.
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Simple 14-day return policy.
Description
The Navien NHB-H Series 55 MBH is a compact condensing heating boiler for homes and small commercial spaces with modest heat loss, such as additions, apartments, garages and well-insulated bungalows. Rated at 55,000 BTU/h and 95% AFUE, it modulates deeply so it can match a small load without short-cycling, which is exactly where oversized boilers waste fuel. The low-NOx burner meets strict emissions requirements, and direct-vent sealed combustion allows PVC or polypropylene venting through a sidewall with no chimney. It is heating-only, so it pairs with an indirect tank when domestic hot water is needed, and it runs on natural gas or propane. The 24 in. by 24 in. cabinet mounts indoors on the wall and operates on standard 120V power. ENERGY STAR qualified; installation by a licensed gas heating contractor is required.
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Shipping and Delivery
Shipping Summary
| Shipping Destination | United States |
| Shipping Cost | Free Shipping |
| Order Cut-off Time | 2:00 PM (Eastern Time) |
| Processing Time | 1–3 Business Days |
| Transit Time | 2–5 Business Days |
| Estimated Delivery | 3–8 Business Days |
| Business Days | Monday – Friday |
| Shipping Carriers | USPS, UPS or FedEx |
Order Processing
Orders are processed after successful payment confirmation. Orders placed before 2:00 PM Eastern Time are reviewed according to our normal processing schedule.
Processing generally requires 1–3 business days before an order is prepared for shipment. Processing time does not include transit time.
Orders are processed Monday through Friday, excluding weekends and public holidays.
Shipping Carriers
To provide reliable delivery throughout the United States, BookSunrise works with trusted shipping carriers. The carrier selected for your shipment depends on the destination, package size, product type, and service availability.
| Primary Carriers | USPS, UPS, and FedEx |
| Carrier Selection | Determined according to operational availability and delivery requirements. |
| Delivery Area | United States only. |
Shipping Restrictions
At this time, BookSunrise ships only to addresses located within the United States.
We currently do not offer:
- International shipping.
- Military APO/FPO addresses (where carrier limitations apply).
- P.O. Boxes for products that require physical delivery by specific carriers.
- Local pickup.
- In-store collection.
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