Potomac, MD · Cooling
Central Air Conditioning System Installation in Potomac, MD
Whole-house cooling design for large Potomac properties
Local detail
Central Air Installation in Potomac
Designing cooling for an 8,000 square foot house is not the same problem scaled up from a 2,000 square foot one. Duct runs are long, static pressure accumulates, west-facing glass walls create enormous afternoon loads in specific rooms, and two-story great rooms stratify badly. We do a room-by-room load and design the distribution to match it, including the returns — which in large homes are the most consistently undersized element we find.
- Two-story great rooms need a return high in the space or they stratify regardless of supply airflow
- Large west-facing glass creates a peak load hours after the rest of the house peaks, which argues for its own zone
- Long duct runs in large homes accumulate static pressure — trunk sizing matters more than in typical housing
Full central air installation process, scope and pricing detail →
The housing
What we find in Potomac homes
Predominantly large single-family homes from the 1960s through the present, ranging from mid-century ranches on acre lots to 6,000–12,000 sq ft custom builds; substantial recent construction and gut renovation activity.
- Three to five separate zoned forced-air systems in a single residence
- Geothermal ground-source heat pumps with vertical or horizontal loop fields
- Hydronic radiant floor heating, frequently in basements, baths and garages
- Whole-house steam humidification and high-MERV or electronic air cleaners
- Propane-fired equipment in Glen Hills and other areas without a gas main
Scope of the work
- Whole-house Manual J load calculation plus Manual D duct design
- Supply and return routing plan drawn before any drywall is opened
- Air handler placement in attic, basement or closet with proper platform, pan and safety switch
- Insulated supply trunk and branch runs, sealed with mastic rather than tape alone
Utilities · Potomac
Electric: Pepco. Gas: Washington Gas where mains exist; propane or oil in Glen Hills, Travilah and outer areas. Water: WSSC Water in served areas; private wells common in Glen Hills and outer Potomac. Permitting authority: Montgomery County Department of Permitting Services (DPS).
Neighborhoods covered
Potomac Village, Avenel, River Falls, Falconhurst, Glen Hills, Bedfordshire, Piney Meadows, Travilah, Potomac Falls, Normandy Farms Estates, Fox Hills and the surrounding 20854, 20859 ZIP codes.
Local factors
Conditions that shape this job in Potomac
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HOA and design review
Avenel and several other Potomac communities operate architectural review with specific requirements for equipment screening, placement and visibility from common areas. Getting approval before installation is straightforward; getting forgiveness afterwards is not. We prepare the submission as part of the project.
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Long runs and access
On acre-plus lots with mechanical rooms far from the exterior wall, line set runs are long, vertical lifts can be significant, and refrigerant charge must be adjusted for line length rather than left at the factory charge. Long runs are also where poor installation practice shows up first, usually as a system that never quite performs to its rating.
Questions
Central Air Installation in Potomac — common questions
Our two-story family room is always uncomfortable. Why?
Can central air be added to a house with radiators and no ductwork?
More central air installation questions answered on the Maryland service page →
More in Potomac
Related work we do in Potomac
Cooling
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Duct Cleaning in Potomac
Duct service for Potomac's large multi-system homes
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HVAC Installation in Potomac
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Central Air Installation in adjacent areas
Montgomery County
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Read more →All 15 services in Potomac, MD · Central Air Conditioning System Installation across Maryland
Talk to a technician
Central Air Installation in Potomac? 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.
Mon–Fri 7:00am–6:00pm · Saturday 8:00am–2:00pm · 24/7 emergency service