Maryland · Heating
Boiler Installation in Maryland
Modern condensing and cast-iron boilers installed on existing radiator systems, with a real heat-loss calculation instead of matching the old nameplate.
Hydronic heat is everywhere in this part of Maryland. Steam and hot-water boilers feeding cast-iron radiators heat a large share of pre-1955 housing in Takoma Park, Silver Spring and the older sections of Bethesda, and they are genuinely excellent heating systems — quiet, even, and comfortable in a way that forced air is not. The mistake is replacing a failing boiler by matching the BTU rating on the old one, which was itself sized for an uninsulated house with single-pane windows.
We perform a room-by-room heat loss calculation and, critically, we measure the connected radiator capacity. Sizing a modulating condensing boiler to a load it can actually modulate down to is what determines whether you get the efficiency you paid for. A 199,000 BTU condensing boiler on a house with a 55,000 BTU load will short-cycle and never reach condensing temperatures — which means it will burn gas like the old one while costing five times as much.
Where we workScope
What the job actually includes
- Room-by-room heat loss calculation plus connected radiator EDR measurement
- Boiler selection matched to load and turndown ratio — sized to modulate, not just to fire
- Near-boiler piping built to the manufacturer's specification, including primary/secondary where required
- New circulator sized to the system head, with proper flow direction and air separation
- Expansion tank, backflow preventer, pressure-reducing valve and low-water cutoff as required
- Outdoor reset control configured — the single biggest efficiency gain on a hydronic system
- Condensate neutralizer, venting to code, and full combustion analysis at commissioning
- System flush, chemical treatment and complete air purge on every zone
Maryland specifics
Code, permits and rebates
Montgomery County DPS requires a mechanical permit for boiler replacement and inspects the installation, including venting and gas piping. Maryland follows the state-adopted fuel gas and mechanical codes with the 2021 IECC, which requires controls such as outdoor reset on many new hydronic systems. High-efficiency condensing boilers can qualify for EmPOWER Maryland rebates through Washington Gas as well as the federal 25C credit. In Takoma Park and other historic districts, sidewall vent terminations on a street-facing elevation may need preservation review, which we factor into vent routing at design time.
Licensing
MD HVACR Contractor License #01-XXXXX. All refrigerant handling is performed by EPA Section 608 certified technicians, and equipment replacement is permitted and inspected through the county.
Process
How we run a boiler installation job
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Heat loss and radiator survey
We measure every radiator to establish real connected capacity, then calculate the actual heat loss. In a 1928 Takoma Park home that has since been insulated, those two numbers can differ by a factor of two — and only one of them should size the boiler.
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Steam versus hot water decision
One-pipe steam systems are not simply upgradable to condensing hot water without replacing the distribution. We will tell you honestly which category your system is in, because a contractor who quotes a condensing boiler on a one-pipe steam system has not looked at your basement.
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Piping design
Near-boiler piping is where most condensing boiler installations fail. We build to the manufacturer's diagram, with proper primary/secondary separation, correct circulator placement relative to the expansion tank, and a real air elimination strategy.
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Installation and venting
Old boiler drained, cut out and removed, new unit set, piped, gas-connected and vented. Condensing boilers vent in PVC or polypropylene through a sidewall, which frequently frees up the chimney and requires a liner for the water heater left behind.
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Purge, balance and commission
Every zone purged of air, outdoor reset curve set for the house, combustion analyzed and recorded. We come back after the first cold snap to fine-tune the reset curve against how the house actually behaves.
Pricing
What moves the price
We do not publish a single number, because a number without your house attached to it is marketing rather than information. These are the variables that actually decide what a job costs, and we itemise all of them in writing before any work begins.
Condensing versus conventional
A modulating condensing boiler at 95% AFUE costs substantially more than a cast-iron atmospheric boiler at 84%, and needs the right emitters and water temperatures to reach its rated efficiency. On a high-temperature cast-iron radiator system without oversized emitters, the real-world gap narrows and sometimes the conventional boiler is the honest recommendation.
Near-boiler piping scope
Sixty-year-old black iron near-boiler piping usually cannot be reused. Rebuilding it properly is labor, and it is the labor that determines whether the new boiler lasts.
Venting and chimney work
Sidewall venting a condensing boiler often orphans the water heater in the chimney, requiring a stainless liner. Budget for it rather than discovering it.
Zoning
Adding zone valves or circulators to separate floors is frequently the best comfort money in the project, especially in three-story homes where the top floor overheats.
Local coverage
Boiler Installation by service area
Every one of these pages is written for that specific market — the housing stock we actually find there, the permitting authority, the utility situation and the failure patterns that repeat in those streets.
Montgomery County
Boiler Installation in Silver Spring
Boiler replacement in Woodside Park, Sligo Park Hills and Indian Spring
Read more →Montgomery County
Boiler Installation in Olney
Boiler replacement for Olney farmhouses and older properties
Read more →Montgomery County
Boiler Installation in Potomac
Boiler and radiant system installation for Potomac homes
Read more →Montgomery County
Boiler Installation in Bethesda
Boiler replacement in Edgemoor, Battery Park and Kenwood
Read more →Montgomery County
Boiler Installation in Germantown
Boiler and hydronic installation in Germantown
Read more →Montgomery County
Boiler Installation in Takoma Park
Boiler replacement in Old Takoma without touching the radiators
Read more →Questions
Boiler Installation questions
Can I keep my cast-iron radiators with a new boiler?
What is outdoor reset and why does it matter?
How long does a boiler installation take?
My boiler is 45 years old but still works. Should I replace it?
Related
Work that usually comes up alongside this
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Boiler Repair Service
Steam and hot-water boiler repair by technicians who actually work on hydronic systems — including the 60-year-old ones still heating half of Takoma Park.
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Heating & Furnace Installation
High-efficiency gas furnaces and heat pumps sized by load calculation, with combustion analysis and venting done to code — not eyeballed.
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HVAC Installers
Complete heating and cooling system installation by a crew that has been replacing systems in Montgomery County since 1985.
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Hot Water Heater Installation
Gas, electric and heat-pump water heaters installed to code with expansion control, proper venting and a permit — usually same day.
Read more →Talk to a technician
Tell us what the house is doing.
Describe the problem and we will tell you what it usually means, what it typically costs to diagnose, and when we can be there. No obligation, no scripted sales call.
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