Hot Water Boiler Replacement in Union County, NJ — Same-Day in Most Cases

Old boiler near the end, leaking heat exchanger, or already failed mid-winter? We replace hot water boilers across Union County — standard efficiency, mid-efficiency, or high-efficiency condensing. Save $300 right now.

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A hot water boiler replacement isn't a small job — but it doesn't have to be a multi-week ordeal either. Continental Plumbers has been replacing hydronic boilers across Union County since 1985. We size based on your home's actual heat load (not the biggest unit we can sell), install code-compliant, pull permits, handle the inspection, and most replacements we complete in 1–2 days. Save $300 on current boiler replacements — and qualifying high-efficiency models get NJ Clean Energy Program rebates on top.

NJ Master Plumber License #9142
Since 1985
4.7★
(1,377 reviews)
Save $300
Financing available
Signs It's Time to Replace

Six Signs Your Hot Water Boiler Is Past Repair

Some boiler issues are still a repair. These usually aren’t:
Your Boiler Is Over 20–25 Years Old

Hot water boilers typically last 15–25 years. Past that, you're on borrowed time. Efficiency drops, parts get harder to find.

The Heat Exchanger Is Leaking

Water leaking from inside the boiler itself (not a fitting or valve) is heat exchanger failure. Almost never economically repairable.

Repeated Repairs Aren't Holding

Two or three repair calls in a year is the system telling you something. The next failure will probably be the last.

Your Heating Bills Keep Climbing

Old boilers lose efficiency every year — corrosion, sediment, deteriorating components. A high-efficiency replacement can cut heating bills 20–40%.

Cold Spots You Can't Fix

After repair, bleeding, and balancing — if some areas still won't heat properly, the boiler itself may not be producing or circulating enough heat.

Visible Rust or Corrosion on the Boiler Body

External rust often signals internal corrosion. Once the pressure vessel is compromised, repair isn't an option.

Not sure if it's repair or replace? Read about Hot Water Boiler Repair → or call (973) 900-0430 — we'll diagnose and tell you straight.

Choosing the Right Replacement

Standard, Mid-Efficiency, or High-Efficiency Condensing — What's Right for Your Home?

Three tiers, three price points, three different long-term cost equations:
Standard Efficiency (80–83% AFUE)

Best for: Tight budgets, simple replacements, homes you don't plan to stay in long-term. Lower upfront cost, proven technology, easy to service.

Mid-Efficiency (84–89% AFUE)

Best for: Most Union County homes. Solid middle ground — better efficiency than standard without the higher install complexity of condensing units.

High-Efficiency Condensing (90–98% AFUE)

Best for: Homes you'll stay in long-term, larger heating loads, anyone maximizing NJ Clean Energy rebates. Highest upfront cost but biggest long-term savings. Requires venting upgrade (often through sidewall) and condensate drain.

We size based on your home's actual heat load — square footage, insulation, window count, climate zone. Not based on what's easiest to install or biggest commission.

Our Replacement Process

How a Hot Water Boiler Replacement Works

Four-step process:

Step 1
On-Site Quote
Licensed Master Plumber arrives, looks at your existing system, takes measurements, and walks through replacement options based on your home and budget. Flat-rate quote — including unit, install, removal of old boiler, permits, and inspection.
Step 2
Permit & Scheduling
We pull the NJ permit under our Master Plumber License (#9142) and schedule the install — typically within a few days, faster for active no-heat emergencies.
Step 3
Installation (1–2 Days)
Old boiler drained and removed. New unit installed with proper venting, condensate handling (if condensing), expansion tank, pressure relief, and zone controls. System flushed, refilled, and pressure-tested.
Step 4
Inspection & Walkthrough
We schedule the township inspection and meet the inspector on-site. After approval, we walk you through your new system — controls, settings, maintenance, warranty paperwork.
We Get It

The Concerns We Hear About Boiler Replacement

"My old boiler died in January. I need heat NOW."

Most common emergency call we get. We can usually get a replacement boiler installed within 1–3 days of the call — and we'll bring portable heaters or troubleshoot temporary fixes while you wait. We don't make you spend a week in the cold.

"I'm getting different quotes from different companies — and they're all over the place."

Normal in this industry. Some companies push high-efficiency on every job because the ticket is bigger. Some push standard efficiency to undercut on price. We size your replacement based on your home's actual heat load and give you honest comparisons — standard, mid, high-efficiency — with realistic payback periods.

"Is high-efficiency really worth the upfront cost?"

Depends on your fuel costs, how long you'll be in the home, and your eligibility for NJ Clean Energy rebates. For homes you'll occupy 10+ years with current natural gas prices, high-efficiency typically pays back in 5–8 years. For shorter-term ownership, mid-efficiency is often the smarter math. We'll run the numbers honestly.

"I manage a multi-family building. The boiler just failed and tenants are calling."

Daily occurrence. We respond fast, deploy temporary heat solutions when needed, expedite replacement, and document everything for your records and insurance. Multi-unit systems take more planning — we know how to do it without taking the whole building offline.

The Neighbor Difference

Why Union County Trusts Continental with Steam Boilers

Local since 1985

40+ years replacing boilers across Union County. We've installed every major brand, every efficiency tier.

Honest sizing, honest options

We size based on heat load, not commission. Standard, mid, or high-efficiency — we tell you the real math for your situation.

Same-day emergency replacement

Boiler failed mid-winter? We expedite. Temporary heat solutions while we install if needed.

Permits + inspection handled

NJ Master Plumber License #9142. Code-compliant, inspected, warrantied. Manufacturer warranties stay valid.

Where We Serve

Boiler Replacements Across Union County

Don’t see your town? call (973) 900-0430

Hot Water Boiler Replacement FAQs

Most replacements: 1–2 days. Same-day installs possible for emergencies if we have the right unit in stock and the install is straightforward.

Yes. NJ requires permits for boiler installations. We pull the permit and handle the inspection — included in our flat-rate quote.

Efficiency rating (AFUE). Standard: 80–83%. Mid-efficiency: 84–89%. High-efficiency (condensing): 90–98%. Higher efficiency = more heat from the same fuel = lower bills. Condensing models also vent differently (PVC sidewall instead of metal chimney) and need a condensate drain.

Usually yes — but it requires venting changes (the chimney won't work for a condensing boiler), often a new gas line size, and a condensate drain. More expensive install, lower long-term operating costs.
Yes. NJ Clean Energy Program offers rebates for high-efficiency boilers meeting specific AFUE thresholds. We tell you what you qualify for and can help with the paperwork.
Yes, through Wisetack — approved in minutes, no credit impact. Useful for high-efficiency upgrades with higher upfront cost.
Almost always yes. Hot water boilers connect to your existing hydronic distribution system (radiators, baseboard, radiant floor). We verify compatibility during the quote.