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Rinnai SENSEI™ RX Series 199 MBH Smart Indoor Condensing Natural Gas/Propane Tankless Water Heater
Original price was: $998.00.$499.00Current price is: $499.00.
Navien NFB-C Series 399K BTU - High Efficiency - Condensing Heating Boiler
Original price was: $1,798.00.$899.00Current price is: $899.00.
Navien NFC-H Series 175K BTU – High Efficiency – Condensing Combi-Boiler – 15:1 DHW
Original price was: $1,598.00.$799.00Current price is: $799.00.
Seasonal Sale — Limited-Time Savings
- 175,000 BTU/h input, 95% AFUE condensing combi-boiler
- 5.4 GPM domestic hot water with 15:1 turndown
- Fire tube heat exchanger with 4.5 gal water volume
- Direct-vent sealed combustion, sidewall or vertical venting
- Natural gas or propane operation
- Residential and light commercial applications
- ENERGY STAR qualified with electronic ignition
- Wall-mount cabinet, 33-1/2 in. H x 17-3/10 in. D
| Weight | 105 lbs |
|---|---|
| AMP | 15 |
| BTU | 175000 |
| MBH | 175 |
| NSF | No |
| AFUE | 95 % |
| ANSI | ANSI Z21.13 |
| ASME | ASME H |
| Depth | 17-3/10 in |
| Media | Hot Water |
| Volts | 120V |
| Width | 17-3/10 in |
| Zones | 3 |
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.
Quality Checked
Product information verified against manufacturer specifications.
Fast U.S. Shipping
Ships from our configured U.S. fulfillment network.
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Easy Returns
Simple 14-day return policy.
Description
The Navien NFC-H Series 175K BTU condensing combi-boiler pairs hydronic space heating with on-demand domestic hot water at 5.4 GPM and a 15:1 DHW turndown ratio. The fire tube heat exchanger and 4.5 gallon water volume smooth out temperature swings in radiant floor and baseboard systems, and the burner modulates deep enough to keep the unit running steadily on mild days rather than short-cycling. At 95% AFUE with direct-vent sealed combustion, it vents through a sidewall in PVC, CPVC or polypropylene and needs no chimney. The boiler runs on natural gas or propane, mounts on the wall in a 33-1/2 in. tall by 17-3/10 in. deep cabinet, and is ENERGY STAR qualified and suitable for residential and light commercial work. Installation must be performed by a licensed gas heating contractor.
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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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