Call & complain to this Gov link
https://www.lnnte-dncl.gc.ca/pfplin-fccoin-eng

Telephone survey, purportedly about air quality, although few questions deal with actual indoor or outdoor air quality issues. Caller identifies self as Ivan, company as Sterling Solutions, doing survey in Edmonton and Calgary areas. Says you may get a call back if you have won a prize for your participation. VERY STRANGE - likely scammers or trying to identify homes they can break into.

I got a creepily similar call just a moment ago.
They said that same thing about an environmental survey but asked about energy efficiency instead of air quality. "Call Somebody Inc" showed up on my caller id, along with a local phone number. They wanted to know things about the size of our home, gas or electric, if our power bill was average, etc. The young woman on the other end of the line was actually nice, so I was compliant. She also mentioned something about calling me back about a gift. That's what tipped me off to something seeming fishy. But the strange thing here is that I got this call in Birmingham, AL. There's something odd about it all...

Yes i was getting this all call all the time, they didn't leave any messages and hanged up if you answered. Good news i put them on my call reject system i set with my computer, and now i don't half to hear them call in again and put up with there bull sh*t scams.Ex... Kill all 1-800 Numbers, spec numbers like (780) 510-2478, plus the messages to spec numbers to basically tell them to f**k off!Also this system works with unknown numbers like ex... my call blocker will tell the party to disable there call blocking feature. This is a loop hole for solicitors use to try *67.Remember when someone calls that you don't know, chances are they always want something from you.

They called me once two days ago and three times yesterday. All four times they stayed on the line after getting my answering machine. I could hear someone breathing (not in a creepy fashion, just breathing) and some activity in the background. They hung up after 10 seconds or so each time. Very strange.

Said he was from Sterling Solutions asked about air quality and proceeded to asked if anyone smoked in the house if anyone had asthma. He asked how long living in house and asked if anyone what type of work we worked in and if we worked fulltime and how long.Can't remember name. Said might win prize and confirm number he had called me at. Just seem to ask more questions were asked off topic of air quality. My guess is vaccum sales and checking if we can afford the overpriced Sh_t.