Description

The Navien NCB-240/130H is a high-efficiency condensing combi-boiler. A combi-boiler is one wall-hung unit that does two jobs: it heats your home through radiators, baseboard or in-floor heating, and it makes domestic hot water on demand. You do not need a separate boiler and a separate water heater. GSHA Services, LTD, a Navien Service Specialist (NSS) and authorized Navien dealer listed on Navien’s installer locator, installs the NCB-240/130H as a complete package from $10,531.91.

Every boiler installation is custom. The “Installed from” price is the starting installed package for this model with GSHA’s standard installation scope; your final price is confirmed by a free on-site estimate. What changes it: the venting route and length, gas line capacity, condensate drain routing, piping and zoning changes (circulators, zone valves, expansion tank and air separation), water-quality treatment, electrical work, removal of the old boiler, permits, and accessories such as NaviLink controls or manifolds, which are priced separately. Financing available with approved credit.

Schedule Boiler Repair | Request a Boiler Installation Estimate or call (224) 220-3660

Who the NCB-240/130H Suits

This model is the second-largest of the five NCB-H sizes. The model number tells you what it does: 130 stands for 130,000 BTU/h of maximum heating input (120,000 BTU/h heating capacity), and 240 refers to the domestic hot water side, rated up to 199,900 BTU/h. Navien lists a hot-water flow of 5.1 gallons per minute at a 70°F temperature rise and 7.9 GPM at a 45°F rise. The rise matters because incoming water in a northern Illinois winter is cold, so the 70°F figure is the realistic one for how many fixtures can run at once in January.

It suits a mid-size to larger single-family home with radiators, baseboard or in-floor heat, and a household that wants steady hot water without a storage tank. GSHA confirms the size with a heat-loss calculation and a count of your fixtures before quoting, because both the heating side and the hot-water side need to match the house.

Benefits You Notice at Home

• One unit, two jobs. The NCB-240/130H replaces both a boiler and a water heater in a cabinet 17.3 inches wide, 29.3 inches tall and 12.8 inches deep that hangs on the wall. That frees floor space in the mechanical room.
• 95% AFUE and ENERGY STAR certified. AFUE is the heating efficiency rating; 95% means about 95 cents of every fuel dollar becomes heat. As a condensing appliance, a second stainless steel heat exchanger pulls extra heat out of the exhaust. That is why the efficiency is high, and also why it vents in PVC and needs a condensate drain.
• Hot water on demand. The built-in domestic hot water module with its own stainless steel heat exchanger, mixing valve and 3-way valve delivers up to 5.1 GPM at a 70°F rise, and it keeps going as long as the fixtures are open. There is no tank to run out.
• Wide modulation. The turndown ratio is how low the burner can modulate. The NCB-240/130H modulates 15:1 on hot water and up to 10:1 on heating, from 13,000 BTU/h up to full input. On mild days it runs low and long instead of starting and stopping, which reduces short cycling and keeps room temperatures steadier.
• Zoning built in. The control board has powered connections for three zone pumps and three zone valves, so a home with several heating zones often needs fewer external controls.

Price and Estimate

Installed from $10,531.91. This is a complete installed price for the NCB-240/130H, not an equipment-only price. GSHA’s standard combi-boiler installation includes setting and leveling the unit, water piping modifications, gas line modification with a new gas valve, a new condensate drain line, a new 150 lb pressure relief valve, a 4.8-gallon hydronic expansion tank, a domestic hot water thermal expansion tank, the Navien primary manifold kit, a NaviClean magnetic filter, a commissioning kit (Protector F1 and Cleaner F3), new PVC flue venting, removal and disposal of the old equipment, and start-up, testing and a safety inspection.

What can change the final quote: gas line capacity and length, the venting route and length, where the condensate can drain, water quality treatment, electrical work, zoning and piping changes to your existing heating loops, permits, optional accessories such as NaviLink Wi-Fi or a NaviCirc recirculation valve, and how accessible the mechanical room is. The estimate is free, and financing is available with approved credit through our financing page.

Request an Installation Estimate or call (224) 220-3660.

Navien NCB-240/130H Specifications

Specification	Value	Source
Type	Condensing combi-boiler, indoor wall-hung, residential	Navien model page
Heating input	13,000 to 130,000 BTU/h (heating capacity 120,000 BTU/h; net AHRI water rating 104,000 BTU/h)	Navien model page
Domestic hot water input	13,000 to 199,900 BTU/h	Navien model page
AFUE	95.0% (DOE test procedure)	Navien model page
ENERGY STAR	Certified	Navien model page
Hot water flow	7.9 GPM at 45°F rise; 5.1 GPM at 70°F rise; 3.6 GPM at 100°F rise; minimum 0.5 GPM	Navien model page
Turndown ratio	15:1 domestic hot water; up to 10:1 heating	Navien model page
Heat exchangers	Dual condensing stainless steel heat exchangers plus a stainless steel DHW heat exchanger; ASME H stamp	Navien model page
Zoning	Built-in powered connections for 3 zone pumps and 3 zone valves	Navien model page
Venting	Direct vent, 2 in. or 3 in. PVC, CPVC or polypropylene (Navien also lists special gas vent type BH and stainless steel as approved materials); 2 in. up to 65 ft, 3 in. up to 150 ft; 0 in. clearance to combustibles	Navien model page
Gas	Natural gas or propane (field convertible); 1/2 in. gas pipe capability up to 24 ft subject to local code	Navien model page
Hot water temperature range	86 to 140°F	Navien model page
Dimensions	17.3 in. W x 29.3 in. H x 12.8 in. D	Navien model page
Weight	96 lbs (102 lbs with water)	Navien model page
Controls	LCD display with dial and Setup Wizard; NaviLink or NaviLink Lite Wi-Fi optional	Navien model and series pages
Navien residential warranty	1 year labor, 5 years parts, 10 years heat exchanger	Navien NCB-H warranty page
Installed from	from $10,531.91	GSHA price book

Optional add-ons from GSHA’s price book: NaviLink Wi-Fi control $288.43, NaviLink Lite $153.55, NaviCirc recirculation valve $99.60. NaviCirc recirculates hot water using your existing pipes when there is no dedicated return line, which shortens the wait at far-away faucets.

Installation and Warranty

Installation is done by GSHA’s Navien Level 3 trained technicians. A condensing combi-boiler needs PVC venting to the outdoors, a place for the condensate to drain, a gas line sized for up to 199,900 BTU/h, and correct connection to your heating loops. Because the NCB-240/130H is wall-hung, we also confirm the wall can carry a unit that weighs 102 lbs full of water. The package includes the primary manifold kit and the magnetic filter that protect the heat exchanger from debris in older systems, and a commissioning kit to clean and protect the system water.

Navien limited warranty (residential): 1 year labor, 5 years parts and 10 years on the heat exchanger. Navien’s warranty applies only to single-family residential installations, runs from the date of installation, and requires installation by a licensed contractor and operation per the manual. The homeowner or installer must provide the installation date to Navien; if proof is not available, Navien uses six months after the manufacture date. Units bought through the internet or unauthorized suppliers are not covered, which is one reason to buy the unit through your installer.

GSHA Install-Right coverage: on top of Navien’s warranty, GSHA’s combi-boiler package adds 5-year parts and 5-year labor coverage. The labor coverage is valid only with annual GSHA maintenance, and service by others voids GSHA’s labor coverage. Warranty service starts with a call to us as the original installer.

Frequently Asked Questions

How much does a Navien NCB-240/130H cost installed?

GSHA installs the NCB-240/130H as a complete package from $10,531.91. That includes the unit, the standard combi-boiler installation scope listed above, removal of the old equipment, and start-up with a safety inspection. Gas line, venting, condensate, zoning and accessory changes can move the final quote, and the estimate is free.

Can one unit really heat the house and make hot water?

Yes. The NCB-240/130H has separate ratings for each job: up to 130,000 BTU/h for heating and up to 199,900 BTU/h for domestic hot water, with a built-in DHW module that includes its own stainless steel heat exchanger, mixing valve and 3-way valve.

How many showers can it run at once in winter?

It depends on your fixtures, so we count them during the estimate rather than guessing. Navien rates the unit at 5.1 GPM with a 70°F temperature rise, which is a realistic winter condition here, and how many showers and faucets that covers depends on their flow rates.

What is the difference between the NCB-240/110H and the NCB-240/130H?

Both have the same 199,900 BTU/h hot water rating and 5.1 GPM at a 70°F rise. The 130H has more heating input (130,000 vs. 110,000 BTU/h), so it is the pick when the heat-loss calculation calls for more heating capacity. If you need more hot water, the NCB-250/150H is the next step up.

Does it need special venting?

It needs direct venting in 2 in. or 3 in. PVC, CPVC or polypropylene, up to 65 ft with 2 in. pipe or 150 ft with 3 in. pipe, plus a condensate drain. GSHA’s standard installation includes new PVC flue venting and a new condensate drain line, so the old boiler’s venting is not part of the package.

Is annual maintenance required?

Yes. Annual GSHA maintenance is required to keep GSHA’s 5-year labor coverage valid, and Navien requires the unit to be installed and operated per its manual. A yearly service checks combustion, cleans the condensate path, verifies system pressure and water treatment, and keeps both warranties in good standing.

Navien NCB-H boiler questions homeowners ask

Do you install and repair Navien NCB-H boilers in my city?

Yes. GSHA Services, LTD installs, services and repairs Navien boilers, including this Navien NCB-H model, across McHenry County and Lake County, Illinois, the northern and western Chicago suburbs and southeastern Wisconsin, from our Woodstock and Lake Bluff locations. GSHA is a Navien Service Specialist (NSS), approved June 30, 2026, is listed on Navien’s installer locator at navieninc.com, and sends Navien Level 3 trained technicians. Check the service-area page if you are near the edge of the area, or call (224) 220-3660.

Can my existing or discontinued Navien boiler be repaired?

Yes. GSHA Services, LTD repairs existing Navien boilers and combi-boilers within its service area, including earlier NCB models that Navien no longer sells. A discontinued model does not automatically need to be replaced; if parts are available and the heat exchanger is sound, repair is usually the sensible first step. As a Navien Service Specialist (NSS), GSHA diagnoses the fault, checks parts availability and gives you a repair-or-replace recommendation before any work starts.

What is the difference between a combi boiler and a heating-only boiler?

This Navien NCB-H model is a combi boiler: one appliance that heats your home through radiators, baseboard or radiant floors and also makes domestic hot water for showers and taps on demand, without a storage tank. A heating-only boiler such as the Navien NHB-H or NFB-H heats the home only; for hot water it needs an indirect water heater or a separate water heater. A tankless water heater makes domestic hot water only and does not heat the house. The combi saves space and a second appliance, but the free on-site estimate confirms it can meet both your heating load and your hot-water demand.

Is this boiler for steam or hot-water heating?

This Navien NCB-H model is a hot-water (hydronic) boiler only; it is not a steam boiler and is not rated for steam in any size. It suits homes with hot-water baseboard, radiators or radiant floor loops. If your home has a steam system (one-pipe radiators with air vents, a sight glass on the boiler), it needs a steam boiler, not this model. The free on-site estimate confirms which system your home has.

What does installation include and what can change the price?

GSHA’s standard installed package for this Navien NCB-H model includes setting and leveling the boiler, water piping modifications, gas line modification with a new gas valve, a new condensate drain line, a new relief valve, a hydronic expansion tank and a domestic hot-water thermal expansion tank, the Navien primary manifold kit, a NaviClean magnetic filter, the system commissioning kit (cleaner and protector), new PVC flue venting, removal and disposal of the old equipment, and start-up, testing and a safety inspection. Every installation is custom, so the venting route, gas line capacity, condensate drainage, piping and zoning changes, water treatment, electrical work, permits and accessories such as NaviLink or extra manifolds can change the final price. The free on-site estimate confirms it.

When does repair make more sense than replacement?

Repair usually makes sense when the boiler is younger, the heat exchanger is sound, the fault is a single part such as a sensor, igniter, pump or gas valve, and parts are available. Replacement becomes the better choice when a heat exchanger is leaking or cracked, repairs are repeating every season, parts for an older model are hard to get, the unit is undersized or oversized for the home, or there is a venting or gas safety concern. An older non-condensing boiler running well below 90% AFUE is another reason to compare the two. GSHA gives you both options with honest reasoning during a service visit or a free on-site estimate.

Request Your Free Installation Estimate

GSHA Services, LTD installs and services Navien combi-boilers throughout McHenry County and Lake County, IL, and the surrounding Chicago suburbs and southeastern Wisconsin from our Woodstock and Lake Bluff locations. See our service area, compare the full lineup on our Navien boilers and combi-boilers page, or learn more about boiler installation. Related models: Navien NCB-240/110H and Navien NCB-250/150H. For tankless water heaters without space heating, see our Navien tankless water heaters page.

Request an Installation Estimate or call (224) 220-3660.