The dimensions and space requirements for electric home theater seating can vary widely depending on the specific model, manufacturer, and configuration. However, here are some general guidelines and common dimensions to help you plan your space:

Common Dimensions
Seat Width:

Single Seat: Typically ranges from 30 to 40 inches.
Loveseat: Typically ranges from 55 to 65 inches.
Sectional/Row Seating: Each seat in a row configuration is usually 30 to 40 inches wide.
Seat Depth:Ranges from 35 to 40 inches.
Seat Height:Ranges from 40 to 45 inches.
Back Height:Ranges from 40 to 45 inches from the floor to the top of the seat back.
Reclined Depth:When fully reclined, the depth can range from 65 to 75 inches.
Space Requirements
Clearance for Recline:Typically, you'll need 6 to 12 inches of clearance behind the seat to fully recline without hitting a wall.
Row Spacing:For comfortable movement and access, it is recommended to have at least 24 to 30 inches of space between rows of seats.
Aisle Space:
If you have multiple rows of seating, leave an aisle of at least 24 inches for easy access.

Legroom:

Ensure there is sufficient legroom in front of each seat, especially when the footrest is extended. A minimum of 20 inches is recommended.
Configuration Considerations Straight Rows vs. Curved Rows:

Curved rows of seats require slightly more space but provide better sightlines for all viewers.
Single vs. Multiple Seats:

If planning multiple seats, consider whether they will be individual chairs, loveseats, or connected in a sectional arrangement.
Modular Designs:

Some electric home theater seats are modular, allowing you to add or remove seats as needed, which can impact the overall dimensions and space requirements.
Additional Considerations
Access to Power Outlets:

Ensure that power outlets are accessible for plugging in the electric features of the seating.
Room Layout:

Take into account the overall layout of the room, including the placement of the screen, speakers, and other furniture.
Walkways:

Leave adequate walkways around the seating area for easy movement and access to other parts of the room.
Example Layout
For a typical home theater room with a straight row of three electric recliners:

Total Width: 90 to 120 inches (3 seats x 30 to 40 inches each).
Depth (When Reclined): Up to 75 inches from the back wall.
Row Spacing: At least 24 to 30 inches between rows if more than one row is used.
Side Clearance: Ideally, 12 to 24 inches of space on each side of the row for easy access.
Custom Configurations
Many manufacturers offer custom configurations to fit specific room sizes and layouts. It’s best to consult the manufacturer’s specifications for the exact dimensions and space requirements for the model you are considering.