A Navien NCB-190/080H typically costs about $2,500-$4,000 for the boiler alone, while a complete replacement commonly totals $6,500-$11,000 installed. The final price depends on local labor, venting and piping changes, removal of the old unit, and whether the existing system needs upgrades.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Boiler only | $2,500 | $3,200 | $4,000 | Unit price varies with availability and supplier |
| Standard installed replacement | $6,500 | $8,500 | $11,000 | Existing connections and venting are usable |
| Complex installation | $9,000 | $12,000 | $16,000 | May include extensive piping, vent, or electrical work |
| Service labor | $125 | $175 | $250 | Typical hourly rate, often subject to a minimum charge |
What a Navien NCB-190/080H replacement usually costs
The NCB-190/080H is a wall-hung gas combi boiler that supplies space heating and domestic hot water. Its model designation indicates up to 190,000 BTU per hour for domestic hot water and about 80,000 BTU per hour for space heating. A straightforward swap generally falls near the installed average; conversion from another boiler type or substantial system corrections can push the job well above it.
Budget roughly $6,500-$11,000 for a standard U.S. replacement, including the boiler, routine installation labor, and common small materials. These figures assume an average-sized home, accessible equipment, standard natural-gas service, and no major code upgrades. A contractor should confirm the correct capacity from a heat-loss calculation and hot-water demand, rather than relying on the existing boiler’s nameplate alone.
Assumptions: standard materials, normal access, existing gas service, and no major hydronic-system repairs.
How boiler, venting, and labor appear in the quote
Quotes may bundle materials and labor, so buyers should ask for an itemized estimate. Installation scope is especially important when comparing a low bid with a higher one: the cheaper quote may exclude removal, condensate drainage, controls, or required vent modifications.
| Quote item | Typical range | What it covers | Cost note |
|---|---|---|---|
| NCB-190/080H unit | $2,500-$4,000 | Boiler and standard packaged components | Stock and seller affect availability |
| Installation labor | $1,800-$3,800 | Removal, mounting, connections, startup | Often 12-24 labor hours |
| Venting and condensate | $300-$1,200 | Approved vent parts, intake, drain | Long or re-routed runs cost more |
| Piping, controls, and fittings | $400-$1,500 | Valves, adapters, thermostat or zone work | Existing system condition matters |
| Removal and disposal | $150-$600 | Old boiler handling and haul-away | May be a separate line item |
At $125-$250 per labor hour, a 12-24-hour installation represents about $1,500-$6,000 in labor before materials and other charges. Actual billing may use a flat project price rather than an hourly calculation.
Which capacity and venting details change the final price
Two specifications deserve attention before accepting a quote. First, the unit’s 80,000-BTU heating output must match the home’s heat loss; an oversized or undersized system can affect comfort and operation. Second, domestic hot-water performance depends on incoming water temperature and flow. A household expecting simultaneous showers may need a different sizing assessment than a smaller household.
Venting is another measurable cost driver. A short, direct vent run may need only a few hundred dollars in parts, while a route exceeding 20-30 feet, multiple elbows, or a difficult wall or roof exit can add several hundred dollars or more. Gas piping also matters: if the existing line cannot supply the appliance’s required input, upsizing or rerouting it can add about $500-$2,000, depending on distance and access.
Capacity verification and a site-specific vent plan can prevent paying for a unit or installation scope that does not fit the home. The installer should identify the vent material and route, condensate disposal method, gas-pipe sizing, and any control or zone changes in writing.
How many labor hours does a combi-boiler swap take
A like-for-like replacement in a prepared mechanical room may take one workday, or roughly 8-12 crew hours. A typical job requiring flushing, new valves, control setup, and commissioning can take 12-24 labor hours. Relocating the boiler, altering several heating zones, or correcting inaccessible piping may extend work to two or more days.
Startup and commissioning should be included in the price. That work can involve checking combustion, verifying gas pressure, testing safety controls, purging air from heating loops, and confirming hot-water operation. A quote that omits these steps may not be comparable to one that includes full testing and documentation.
How regional labor rates shift the installed price
Labor and permitting commonly make urban installations more expensive than work in lower-cost rural markets. Compared with a broad national estimate, high-cost coastal metro areas may run about 15%-30% higher, while some rural markets may be 10%-20% lower when the job is straightforward. These are planning adjustments, not guaranteed local prices; travel distance, contractor availability, and local code requirements can outweigh regional averages.
Use the installed ranges as a starting point, then request local quotes that list the same equipment and work scope. Ask whether sales tax, permit fees, disposal, and post-installation service are included. Permit charges can range from about $50-$500, with more involved inspections or local requirements costing extra.
When vent changes or repairs add charges
Common extras include a new condensate pump at $150-$450, an upgraded expansion tank at $150-$500, gas-line work at $500-$2,000, and heating-system flushing at $300-$900. Water treatment or a magnetic dirt separator may add roughly $200-$700 when recommended for system protection. These are not automatically necessary on every replacement; the contractor should explain the specific condition that requires each item.
Removal of asbestos-containing materials, concealed water damage, or major chimney and wall repairs can exceed these routine add-ons. Such work should be priced separately, with any required licensed trade or inspection identified before installation begins.
How to lower the NCB-190/080H installation bill
Keep the boiler in its current location when the vent, gas line, and service access are suitable. Moving equipment can add labor, pipe, electrical, and finish-repair costs without improving performance. Before approving upgrades, ask which parts are required for safe operation or code compliance and which are optional accessories.
Compare at least three itemized estimates using the same model, vent scope, controls, disposal, permit handling, and commissioning tasks. Scheduling before the heating season may improve appointment availability, though it does not guarantee a discount. If only one component has failed, get a diagnosis and repair price as well as a replacement quote; repairs can be less expensive when the boiler is otherwise in sound condition and parts are available.
The most reliable savings come from controlling scope and comparing equivalent quotes, not from removing necessary safety or commissioning work.