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

Silver Spring, MD · Cooling

Ductless Air Conditioning System Installation in Silver Spring, MD

Mini-splits for Silver Spring attic conversions, additions and sunrooms

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Local detail

Mini-Split Installation in Silver Spring

The classic Silver Spring mini-split job is a third-floor attic bedroom in a Woodside Park or Seven Oaks colonial — converted decades ago, served by one undersized duct run, and unusable in August. A single cold-climate head makes that room work year round. The second most common is a rear addition or enclosed porch where extending the original 1950s duct system would starve the rest of the house.

  • Third-floor conversions in Woodside Park and Sligo Park Hills need vertical lift planning and sometimes an oil trap on the line set
  • Line-hide routing on street-facing brick elevations gets planned with you before anything is drilled
  • Cold-climate models make an attic bedroom usable in January too, replacing space heaters that overload old branch circuits

Full mini-split installation process, scope and pricing detail →

Multi-zone ductless system A single outdoor condenser connected by individual line sets to three indoor wall heads on separate floors, each with its own thermostat setpoint. 68° 72° 70° Zone 01 Zone 02 Zone 03 One outdoor unit Line sets
Each head is its own zone with its own setpoint, so you condition the room you are in rather than the whole house. Sizing is still per room — an oversized head in a small bedroom short-cycles and leaves it humid, which is the same failure as an oversized central system in miniature.

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

  • Per-zone load calculation so each head is sized to its own room, not to a catalog default
  • Single-zone or multi-zone outdoor unit selection with correct line-set lengths and lift limits
  • Wall, ceiling-cassette, floor-console or slim ducted indoor units depending on the room
  • Line-set routing planned for the shortest visible run, with paintable line-hide covers outdoors

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. 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.

  2. Montgomery County DPS permitting

    Equipment replacement requires a mechanical permit from the Montgomery County Department of Permitting Services, with an inspection after the work. We file it as part of the job. Unpermitted mechanical work reliably surfaces on home inspection reports at resale, and in Silver Spring's fast-turning market that matters.

Questions

Mini-Split Installation in Silver Spring — common questions

Will a mini-split head look out of place in an older Silver Spring home?
Wall heads are visible — there is no honest way around it. In rooms where that is unacceptable, ceiling cassettes and slim concealed-duct units mounted in a soffit or knee-wall give you the same performance with only a grille showing. We walk the room with you and pick the unit style before quoting.
Do mini-splits heat well enough for a Maryland winter?
Cold-climate inverter models do. They are rated to deliver full or near-full capacity down to around 5°F, and Maryland design temperatures in the Washington suburbs sit near 15°F. For most rooms a properly sized cold-climate head is the only heat source needed, though we often keep existing heat as backup in whole-house conversions.

More mini-split installation questions answered on the Maryland service page →

More in Silver Spring

Related work we do in Silver Spring

Cooling

Central Air Installation in Silver Spring

Retrofitting central air into radiator-heated Silver Spring homes

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Cooling

AC Installation in Silver Spring

Air conditioning sized for Silver Spring's pre-war brick, not for its square footage

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Whole system

HVAC Installation in Silver Spring

Full system replacement in Silver Spring, from Woodside Park to White Oak

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Heating

Furnace Installation in Silver Spring

Furnace replacement on Silver Spring's converted, patched and re-patched duct systems

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Nearby

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All 15 services in Silver Spring, MD · Ductless Air Conditioning System Installation across Maryland

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Mini-Split Installation in Silver Spring? Tell us what the system 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.

Call (301) 555-0182 Request a quote

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