Any good ways to get more airflow through my condo?

If the outdoor air is cooler, try flushing the condo in the evening or early morning. Open the available windows and use a fan in one window to blow air out. That can draw replacement air in through another opening, though with windows on just one side, the airflow may be limited.

Close the windows again once it gets warmer outside. Skip the window-fan routine when outdoor air is smoky, very humid, or otherwise unpleasant.

Fans work best when they’re moving air along a path, not just pointed at a wall. A small fan near the bedroom or down a hallway can help push air toward a window fan exhausting outdoors. If the layout has turns or closed doors, keep the route open and experiment with fan positions.

A ceiling fan can make a room feel more comfortable, but it doesn’t lower the room’s temperature by itself.

Since sunlight is adding heat, blocking some of it may do more than adding fans. Exterior shading is generally effective if your condo rules allow it. Indoors, try blinds or curtains with a reflective or heat-reducing backing, and close them while the sun is hitting the windows. Window film is another option, but check the product and building rules before applying it.

I wouldn’t feed a fan into the furnace or central-air ducts as a DIY workaround. Duct systems are designed around particular airflow and pressure, and an improvised setup may not move much air or could cause problems. If the thermostat has a fan-only setting, check the equipment manual or ask the building’s maintenance team why it isn’t working.

If outdoor air can’t cool the condo enough, a portable AC with a dual-hose setup is worth comparing with other cooling options. It still needs a suitable window or door vent and approval if your condo has restrictions.