How to Stop a Neighbor's Smoke From Entering Your Home

Few things make a home feel less like yours than a neighbor's cigarette or weed smoke drifting in through the walls, vents, or windows. If you have asthma, allergies, or you are just tired of your bedroom smelling like someone else's habit, you are not imagining it, and you are not powerless.

How smoke gets in

In apartments and townhomes, smoke travels through shared walls, gaps around outlets and plumbing, hallway doors, and any spot where air can move between units. Sealing helps, but you can rarely seal every path, and sealing alone does not clear what already made it inside.

Why sealing and purifiers only go so far

Weatherstripping and outlet gaskets are worth doing, and a good air purifier will catch smoke particles once they are inside. But neither one addresses the pressure difference that pulls smoke into your home in the first place, and a purifier does nothing for the smell that rides along on gases.

The positive pressure approach

Here is the trick most people never hear about. If you gently bring in a little more filtered air than you let out, your home sits at a slight positive pressure, and air wants to flow out through those cracks instead of in. That is a real, physical barrier against smoke intrusion, not just filtration after the fact.

A window ERV like SWERV is built to do exactly this. It supplies fresh outdoor air through a MERV 13 and activated carbon filter, which is the combination that captures both smoke particles and much of the odor, while keeping your room at a slight positive pressure so your neighbor's smoke has a much harder time getting in. And because it recovers about 85% of your heating and cooling, you are not freezing or overpaying to run it.

A simple plan

Seal the obvious gaps, run filtered fresh-air ventilation at a slight positive pressure, and keep a purifier on hand for the worst days. That combination is what finally gives a lot of our customers their air back. See how SWERV works.