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Navien Installation

Navien Boiler & Combi Installation on Long Island

If you’re reading this, you’re probably staring at an aging boiler or a water heater on its last legs, and somebody told you to look into Navien. Good advice.

I’m Louie the Boiler Man, and Navien installation is the thing I’m known for. Factory-trained, Navien-certified, with hundreds of combi boilers and tankless systems installed across Nassau, Queens, Brooklyn and the Bronx since 2012. This isn’t a brand I dabble in — it’s the equipment I’ve built my reputation on.

What a Navien can replace in your house

The most popular move on the South Shore right now is the combi: one wall-hung unit, about the size of a suitcase, that replaces your boiler AND your water heater at the same time. Endless hot water, heat for the whole house, up to 95% efficiency, and a chunk of your basement back.

NCB combi series — home heating + domestic hot water in one unit. The two-birds-one-stone play for most homes.
NPE tankless series — endless hot water on demand, replaces a tank water heater.
NFC / NFB fire-tube boilers — high-efficiency heating for larger homes and higher demands.

Not sure which one fits your house? That’s literally my job. Text me a photo of your current setup at (917) 468-2325 and I’ll tell you straight what makes sense — including when a Navien is NOT the right answer. It happens.

What a proper installation includes

Real sizing — heat loss and radiation measured, not guessed from the old boiler’s sticker
Gas line evaluated and upgraded if needed — undersized gas lines are the #1 cause of tankless problems
New stainless or PVC venting run to Navien spec
Condensate drainage done right — these are condensing units and the acidic condensate has to go somewhere legal
Water treatment discussed up front — on Long Island water, a scale filter at install protects your investment
System flushed, purged, combustion-tested with an analyzer, and dialed in to spec
Permits and inspections handled with your town or village
Old equipment hauled away, and a walkthrough so you know how to run your new system

Why the installer matters more than the box

Here’s the honest truth about Navien: when you hear someone complain about one, nine times out of ten the problem isn’t the unit — it’s the install. Undersized gas line. Venting that sags. No condensate neutralizer. A combi sized off a guess. The machine gets blamed for the shortcuts of whoever put it in.

A factory-trained installation is the difference between a system that runs quietly for 15+ years and one that throws error codes every winter. And because we’re local — 997 Merrick Road in Baldwin — the same shop that installs your unit is the one that maintains it, descales it every year, and answers the phone if anything ever acts up. Installer, servicer, and warranty shop, all one number.

Where we install

Our home zone is South Nassau — Baldwin, Freeport, Merrick, Oceanside, Rockville Centre, Island Park, Long Beach, Roosevelt, Uniondale and Hempstead — with installations across Nassau County, Queens, Brooklyn and the Bronx.

Call or text 516-377-5200 for a quote. Most estimates happen same day, and a photo of your current boiler or water heater gets you 80% of the way to a real number.

Frequently asked questions

How much does a Navien combi installation cost on Long Island?

It depends on the model, the condition of your gas line and venting, and what we’re removing. Call or text 516-377-5200 with a photo of your current setup and we’ll give you a real number — most quotes happen same day.

What’s the difference between a combi and a tankless?

A tankless unit (NPE series) handles hot water only. A combi (NCB series) does both jobs in one wall-hung unit — it heats your home AND your water, replacing a boiler and a water heater at once. For a lot of South Shore homes, one combi retires two aging pieces of equipment.

How long does the installation take?

A straightforward swap is usually done in a day. Converting from an old cast-iron boiler with new venting and gas line work can run into a second day. You’ll know the timeline before we start.

Do combi boilers work in older homes?

Yes — we put them in pre-war homes in Freeport, Rockville Centre and Baldwin all the time. The key is proper sizing against the home’s actual heat loss and radiation, which is exactly the step a factory-trained installer doesn’t skip.

Do you handle permits and inspections?

Yes. Licensed and insured, and we deal with the paperwork with your town or village — which matters in Nassau County, where every village has its own building department.

Who takes care of the unit afterward?

We do. Annual maintenance and descaling is our $599 flat-rate full service, and warranty work goes through us as a Navien-certified shop. The installer and the servicer are the same phone number.

WE DON'T LIKE TO BRAG

Read reviews from our satisfied customers.

Esteban I.
Esteban I.
Committed to doing the job well

Excellent professionals, committed to doing the job well. I am satisfied with their work and would recommend their services.
Satisfied Customer
Satisfied Customer
5 Star Company!

Thank you so much for showing up on-time and taking care and fixing my air conditioner! Very efficient company from appointment confirmations to easy bill pay notification. 5 Star Company!!
RoseAnn V.
RoseAnn V.
Very very happy

Wonderful company Great. Service. I would recommend this company to everyone. They did an awesome, amazing job. Very very happy
Daniel G.
Daniel G.
Next time I have an issue, he will be the first I call

Luis and company were absolute lifesavers today. AC died on me and with one quick call, was able to meet him at his office for the vital part I needed. He was nice enough to walk me through the easy ...
Edwin P.
Edwin P.
Looking forward to being a long time customer!

Great first experience!! Technician was knowledgeable & friendly. Took his time checking my system & explained things so that I could understand. Looking forward to being a long time customer!

WE DON'T LIKE TO BRAG

Read reviews from our satisfied customers.

Esteban I.
Esteban I.
Committed to doing the job well

Excellent professionals, committed to doing the job well. I am satisfied with their work and would recommend their services.
Satisfied Customer
Satisfied Customer
5 Star Company!

Thank you so much for showing up on-time and taking care and fixing my air conditioner! Very efficient company from appointment confirmations to easy bill pay notification. 5 Star Company!!
RoseAnn V.
RoseAnn V.
Very very happy

Wonderful company Great. Service. I would recommend this company to everyone. They did an awesome, amazing job. Very very happy
Daniel G.
Daniel G.
Next time I have an issue, he will be the first I call

Luis and company were absolute lifesavers today. AC died on me and with one quick call, was able to meet him at his office for the vital part I needed. He was nice enough to walk me through the easy ...
Edwin P.
Edwin P.
Looking forward to being a long time customer!

Great first experience!! Technician was knowledgeable & friendly. Took his time checking my system & explained things so that I could understand. Looking forward to being a long time customer!

RELIABILIABLE & QUALITY HVAC SERVICES

Our team always has your best interest in mind!

Guaranteed Quality

We aren't happy unless all of our customers are happy. We always stand behind our work, and don't leave the job until it's done right!

Fast, On Time Arrival

We pride ourselves on getting to you in a timely manner, every time! We aim to minimize stress so you can get back to your day.

24/7 Service

Seven days a week, our team is available for you in case of an HVAC or plumbing emergency! Call now to see how we can help.

Ask Us About Our Financing Options

We understand that some projects require additional assistance. Contact us for more information about our options. Assistance is available for new install and repair.

Ask Us About Our Financing Options

We understand that some projects require additional assistance. Contact us for more information about our options. Assistance is available for new install and repair.