Hi @tillysprojects
@JacobZ Has pretty much all the bases covered re smoke and air invasion so a good job done there his ideas work the trick is to find your homes weak spots and seal them. Some whirly bird openings and a tiled roof will not stop smoke on the exterior of your house so focus on interior . linings and hole through the ceiling like bathroom exast fans the best one have a flap that closes when the air flow stops others will let smoke pour in.
Try find the smoke gaps.
I would roll up some paper or cardboard and lite it and then blow it out so it is smoking away and walk around the OUTSIDE of house with the keenest nose indoors hold it 30 cm away from door openings and windows etc and watch the smoke drift patterns
I would like to chime in as I have being defending my house against a smoker neibour one of the hells of smaller residential blocks and close living. So my problem is 24/7 365 days of the year randomly. there back porch is 3 meters to the fence line and 1 meter extra to my house. Plus at bush burn off times is similar to your problems extra solutions
I have won that smoke battle. I tell you this so yuo will get a chuckle My lastest strategy against directional cigarette smoke is an industrial fan as we also have built an outdoor BBQ area that is nice to sit in with out being gassed. This dosnt apply to your situation directly. I use an industrial fan and blow his smoke away pointed alone the fence line mounted on the house as it is close by. At full power it sounds like a small plane taking off lol when we are out side I hope the slight increase in noise pollution dosent bother them. It is low in power consumption so run it on medium when outdoors I run it a max when they smoke other unknown substances. and is 97% effective. Yeah I reclaimed my out door space.
There is talk of a new law for smokers living in close suburban settings and apartments but not yet delivered.
@tillysprojects For your house the ultimate solution is pressurize your living space with clean air. ( Called Positive Pressure Home Vent System) Depending on your house size one unit may be enough in a centeral location if you no " more gap" all the interior cracks this will help and use new foam seals on doors and windows.
So The idea is to pressurise your house interior slightly so any gaps, or a door opens air flows out pushing smoky air away and out. And if a bit gets in re door opening closeing it will be filtered or pushed out too. The ideas is to do it so it wont cost the earth so do some research on a system.. I had a sales man try sell me one after I spent years sealing the house from cold /hot air and smoke. so I didnt need one at the time/
How is this done? There are roof filter units avaliable that will take outside air and filter it to a high degree and pump it into your living space increaing inside pressure slightly almost like and air conditioner the key difference is the outside intake is needed to increase air pressure is important.
Closed systems. Air conditioners recirculate avaliable air inside the house with some low grade flimsy filtering but can not create the positive air presssure needed for air to flow out the cracks not in. Like a fan in your house it blows air in a positive direction and creates a negative vacuum behind it but the net pressure increase in the room is zero. There are small interior ceiling mounted ( fans + lights + filter + ionising units) that sit where your light is. I am not fully convince ionization works effectivly. ?
They wont stop smoke getting in just filter the air in a room to reduce it. Called ( Ceiling mounted purifiers) cost approx $400 ea/room.
Make your bedroom a smoke free zone so at lest you can sleep well for starters.
Follow @JacobZ ideas too as they will help warm and cool your home too.
Definently a good place to ask your question. I am sure you will find a bunch of solutions in here for stopping smoke entering your house.
