IECC Zone 4A (mixed-humid)

Mini Splits & Heat Pumps in Maryland

Maryland spans the Appalachian west (Deep Creek, Cumberland) which is colder and mountainous, and the Chesapeake east which is mild and humid. Baltimore and DC suburbs see summers in the 90s and winters into the teens. Salt air affects the Eastern Shore.

Climate Zone
4A (mixed-humid)
Cooling Degree Days
1,100–1,400
Heating Degree Days
4,500–5,500
Dominant Load
balanced

What Works in Maryland

Central and eastern Maryland work well with a 5°F-rated DIY unit. Western Maryland (Garrett County, Allegany) benefits from hyper-heat. BGE, Pepco, and Delmarva all offer rebates up to $1,000-$1,500 per system, stackable with federal 25C.

MrCool DIY 5th GenMrCool Hyper Heat (western)

Maryland Rebates & Incentives

Maryland HEEHRA administered by MEA (Maryland Energy Administration). BGE, Pepco, Delmarva, and Potomac Edison all offer parallel rebate programs.

Major Utilities
  • BGE
  • Pepco
  • Delmarva Power
  • Potomac Edison

Maryland Licensing & Install Rules

Maryland requires a Master HVACR license from the State Board for commercial installs. Homeowner DIY permitted on primary residence.

Top Maryland Metro Areas

We ship to every ZIP in Maryland. Largest metros where we deliver most often:

Baltimore, MD
Columbia, MD
Germantown, MD
Silver Spring, MD
Frederick, MD

Recommended for Maryland Homes

Heat pumps and mini splits in our catalog that match Climate Zone 4A (mixed-humid) conditions.

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