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Navien

Navien™ NFB-301C 301,000 BTU Condensing Fire Tube Boiler

4.8 out of 5 · 6 reviews

$4,549.35

SKU NNFB301C · Taxes calculated at checkout

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Delivery
Ships in 1 business day (Mon–Fri), arrives in 1–3 business days (Mon–Fri). Order before 11:00 PM CST (UTC −6) to ship the next business day.
Returns
90 days from delivery, defective or not. No restocking fee. Approved refunds land within 7 business days.
Warranty
Three-Year Limited Warranty against manufacturing defects under normal use conditions — or the manufacturer's term where that is longer.

Questions before you order? Call +1 575 271 0768

Product details

Sized for commercial work at 301,000 BTU, this boiler carries the same fire tube exchanger used across the NFB line, patented and built in stainless steel, a design meant to keep pressure off high-stress welds. A dual venturi system sharpens combustion control and widens the turndown range, and maximum operating pressure is 160 PSI.

Operation and troubleshooting run through a 7-inch color display, and the boiler reports to a building automation system over a BAS connection. Pipe connections at both top and bottom let it mount on a wall or sit on the floor. An orifice and conversion kit for natural gas to liquid propane are included. The limited warranty covers the heat exchanger for ten years, parts for three, and labor for one.

Customer reviews

What people say about buying from us

4.8 out of 5 from 6 store reviews. These cover the buying experience across our catalog, not this product alone.

  • Arrived early and packed properly

    Ordered on a Thursday and it was on a pallet outside my garage Monday morning. Every board was numbered and the hardware came in labelled bags, so we did not have to guess at anything. Two of us had it standing by Sunday afternoon.

    Marcus T.· Round Rock, TXVerified order

  • Lumber quality is genuinely good

    I have built two of these from other brands and returned one for warped boards. Not a single warped piece in this kit. The kids have been on it every day since we finished it.

    Dana R.· Columbus, OHVerified order

  • Correct weight, factory sealed, clean invoice

    Ordered Thursday, on the truck Friday. Cylinder was sealed and the weight was exactly right. The invoice had everything my bookkeeper needed, which is more than I can say for the supplier I was using before.

    Victor A.· Hialeah, FLVerified order

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