Navien NHB-H Series 55 MBH – High Efficiency Condensing – Heating Boiler
Navien

Navien NHB-H Series 55 MBH – High Efficiency Condensing – Heating Boiler

Boilers

$239.76 Sales tax calculated at checkout
Bundle & Save Mix & match anything under $550 · taken off in the cart, no code

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This boilers + any of these count toward Bundle & Save
  • Free tracked delivery3–5 business days after dispatch to most US addresses; 5–8 to Alaska, Hawaii and US territories.
  • 30-day returnsUnused, in its packaging. Faulty or damaged on arrival, we pay the return; a change of mind, you do.
  • Secure checkoutPayment is handled and encrypted by Shopify Checkout.

Overview

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.

Good to know

When will it arrive?

Orders placed before 2:00 pm ET on a business day ship the same day from Orlando; Saturday orders before 1:00 pm ET go out that afternoon. After that, it ships the next business day.

Delivery takes 3–5 business days after dispatch to most US addresses, and 5–8 to Alaska, Hawaii and US territories.

Can I return it?

Yes — tell us within 30 days of delivery and send it back unused, in its packaging, for a full refund. If it is faulty, damaged in transit or not as described, we pay the return; if you have changed your mind, the return shipping is yours, and we quote it before anything is booked.

Read the full returns policy

How does Bundle & Save work?

Every item under $550 counts, and you can mix them: 2 items save 5%, 3 save 10%, 5 or more save 15%. The saving is taken off automatically in the cart — there is no code to enter.

Is there an order limit?

Online orders are limited to $1,099 each, before sales tax. The quantity selector and the cart stop at that figure, so checkout never surprises you.

Do I need to be in for the delivery?

Orders over $150 ship with signature on delivery, so a missing parcel can be claimed. Your tracking number is emailed the moment the label prints.

Navien NHB-H Series 55 MBH – High Efficiency Condensing – Heating Boiler $239.76

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