Gotha grew around a railroad stop south-east of Oakland, about seven miles out, and it remains unincorporated county land.
Its houses span most of a century: farmhouses from the early 1900s, mid-century ranches, subdivisions added in the 1990s. Older properties there often have gas service, so furnaces are common, while the newer sections lean on heat pumps with resistance backup. Two neighbours a street apart can be running entirely different systems.
The ground rides a little higher than Oakland's, and that small difference shows before dawn in cold weather, when the night's lowest reading comes in a touch under downtown's.
A frequent call on the older properties is a bedroom at the far end of the house that never warms. The furnace is usually fine; the run that was added when a porch became a room is the problem, undersized for the distance and leaking at every joint it passes. Chasing that means measuring airflow at the register and inspecting the trunk rather than replacing parts until something changes. Permitting runs through the county.