Boiler Installation

Installation costs depend on the boiler type, whether a fuel conversion is involved, and what venting the building can support, so a published flat price would be misleading. You get a clear, itemized estimate after an on-site heat-load assessment — before any equipment is ordered.

Most residential replacements are completed in one to two days, depending on how much venting and piping has to change. An oil-to-gas conversion or a switch to a condensing unit needing new venting typically runs to the longer end of that range.

Sizing comes from a heat-load calculation — square footage, insulation, window and radiator count, and domestic hot water demand — not from matching the old unit's rating. That matters because a great many existing NYC boilers were oversized to begin with, and copying that number forward carries the original mistake into the new system.

Often, yes. A single failed component on a sound, correctly sized boiler is a repair, and age alone does not change that. Replacement earns its cost when repairs have become annual, when the heat exchanger or shell itself is compromised, or when the original unit was sized wrong — because no repair fixes a sizing problem.

It depends on your hot water pattern more than your heating one. A combi handles both heat and domestic hot water from one unit and saves the space a separate water heater takes, which suits smaller households and tight mechanical rooms. Homes with high simultaneous hot water demand — several bathrooms in use at once — are usually better served by a separate system.

Yes. Narrow rowhouses, brownstones, and multi-unit buildings with tight mechanical rooms are a large share of what we install, and access planning for getting equipment in and out is part of the design stage rather than an installation-day surprise.

Yes, though these buildings often require board approval or advance notice before mechanical work begins, which we help coordinate into the project timeline.

Where permitting is required, that portion is coordinated through our licensed partner network — see our Licensing & Compliance page for how this works. We confirm what applies to your specific scope before work begins.

Usually, and the size of the improvement depends less on the efficiency rating than on what you are replacing. Correctly sizing a system that was previously oversized often produces a larger real-world saving than the efficiency percentage alone would suggest, because an oversized boiler short-cycles and wastes fuel regardless of how efficient it is on paper.