Why Energy Efficient Doors Matter in Maryland’s Climate Zone 4A
How Zone 4A Affects Entry Door Choices Maryland sits in climate zone 4A, which means a door has to handle muggy summer air, winter cold, and the constant back and forth of shoulder seasons. Even a well-kept house can feel drafty if the door is poorly insulated, poorly sealed, or simply too old for the climate. When that does not happen, the HVAC system works harder, indoor comfort drops, and the surrounding trim and flooring can take extra stress from moisture swin