Hi -
Someone I know has a unit in a multi-story building. The heat is central in the building, but the AC equipment seems to be specific to their unit. The building is a co-op. I've noticed during this cold spell here in the US that an area behind one interior door, near the AC, is extraordinarily cold.
I've tried to suggest a professional energy auditor (or similar) be brought in to help assess if any measures can be recommended to revise the setup of the AC Unit (perhaps as a seasonal measure, or perhaps as a permanent measure). Or, perhaps something else that I don't understand should be done. I don't have any really good knowledge of weatherization matters. I do see some information at energy.gov, but still, maybe there are folks here who can provide some insight.
So, the question becomes - any pointers from the folks here as to weatherization, particularly as to winter/cold matters?
Maybe it's not important, but I think I've seen a neighbor in Arizona putting some sort of covering on a roof HVAC-related unit during winter. Not sure. (On my own house, the heat pump doesn't have ventilation, so I guess that's why it's not something that has come up).