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Navien

Navien™ NFB-175H 175,000 BTU Condensing Fire Tube Boiler

4.8 out of 5 · 6 reviews

$2,080.00

SKU NNFB175H · 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

Rated at 175,000 BTU, this heat-only boiler is built around a fire tube heat exchanger in patented stainless steel, shaped to cut down on the high-stress welds common to other designs. A dual venturi system manages combustion and widens the turndown range.

The cabinet hangs on a wall rather than standing on the floor, which frees up room in a mechanical space, and powered connections for three zone valves or three zone pumps are already in place. Commissioning runs through a text display and a quick dial with a guided wizard. Orifice conversion kits for propane and high-altitude natural gas ship with the boiler. Venting is 2-inch PVC to 65 feet or 3-inch to 150 feet. Warranty covers one year labor, five years parts, ten years heat exchanger.

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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