Licensed Maryland HVACR contractor · 41 years in Montgomery County 24/7 emergency service
Poteete HVAC · since 1985

Silver Spring, MD · Heating

Boiler Installation in Silver Spring, MD

Boiler replacement in Woodside Park, Sligo Park Hills and Indian Spring

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Local detail

Boiler Installation in Silver Spring

A large share of pre-1955 Silver Spring homes still run their original hydronic distribution, and those cast-iron radiators are worth keeping. What is worth replacing is a 1970s atmospheric boiler sized for a house that has since been insulated and re-windowed. We measure connected radiator capacity and calculate actual heat loss, which in these homes routinely come out 40 percent apart — and only the heat loss should size the boiler.

  • Steam versus hot water matters enormously: one-pipe steam systems in this housing stock cannot simply be swapped for a condensing boiler
  • Sidewall venting a condensing boiler usually frees the chimney but orphans the water heater, which then needs a liner
  • Outdoor reset control transforms comfort in drafty pre-war homes and is standard on our installations

Full boiler installation process, scope and pricing detail →

Hydronic heating loop A boiler feeding hot water through a supply main to cast-iron radiators, returning cooler water through a circulator and expansion tank. Boiler Circulator Radiator Radiator Expansion Reset Supply — heated water out Return — cooled water back
Cast-iron radiators are worth keeping. What is worth replacing is a boiler sized to a house that no longer exists — one that has since been insulated and re-windowed. Outdoor reset is where the comfort gain lives: 130-degree water circulating steadily beats 180-degree water in short bursts.

The housing

What we find in Silver Spring homes

Predominantly 1925–1965 brick colonials, Cape Cods and ramblers, with 1970s split-levels in Colesville and White Oak and a dense core of post-2000 high-rise condominiums downtown. A large share of pre-1955 homes were built with hydronic heat and had cooling added decades later.

  • Hot-water and one-pipe steam boilers with cast-iron radiators in pre-1955 homes
  • Converted oil-to-gas forced air, often on undersized original return ductwork
  • Gravity-furnace-era duct systems retrofitted with modern blowers they were never designed for
  • Vertical stack fan coil units and water-source heat pumps in downtown condominium towers
  • Mid-1990s and early-2000s split systems now well past expected service life

Scope of the work

  • 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

Utilities · Silver Spring

Electric: Pepco. Gas: Washington Gas. Water: WSSC Water. Permitting authority: Montgomery County Department of Permitting Services (DPS).

Neighborhoods covered

Downtown Silver Spring, Woodside Park, Four Corners, Forest Glen, Sligo Park Hills, Northwood Park, Kemp Mill, White Oak, Colesville, Indian Spring, Seven Oaks, Hillandale and the surrounding 20901, 20902, 20903, 20904, 20905, 20906, 20910 ZIP codes.

Local factors

Conditions that shape this job in Silver Spring

  1. Sligo Creek valley humidity and tree canopy

    Homes along the Sligo Creek corridor and in Sligo Park Hills sit in a shaded, humid microclimate. Heavy tree canopy loads condenser coils with pollen and seed fluff in spring, and the lower solar gain means these homes are frequently over-cooled by systems sized on square footage alone.

  2. Orphaned water heaters in shared chimneys

    The single most common unsafe condition we find in Silver Spring basements: an 80% furnace was replaced with a condensing unit vented out the sidewall, leaving the water heater alone in a masonry chimney sized for two appliances. It cannot establish draft, and combustion products spill into the basement. We check this on every visit.

Questions

Boiler Installation in Silver Spring — common questions

Is my Silver Spring house on steam or hot water?
A quick test: if each radiator has a single pipe entering it and a small silver air vent on the side, it is almost certainly one-pipe steam. Two pipes at the radiator and a circulator pump on the boiler means hot water. The distinction changes everything about what equipment can be installed, so we confirm it on site before quoting.
Can I keep my cast-iron radiators with a new boiler?
Almost always, and you should — cast-iron radiators are durable, they hold heat beautifully, and replacing them buys you nothing. What changes is the boiler, the controls and often the circulator and piping. Many homeowners are surprised that the most comfortable part of their house is the part we are not touching.

More boiler installation questions answered on the Maryland service page →

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All 15 services in Silver Spring, MD · Boiler Installation across Maryland

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Call (301) 555-0182 Request a quote

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