Logic would indicate someone wants to know when people are home and is looking at patterns.

I received a call from a woman saying i had won a prize for participating in a health survey in November. She said i had the choice of a bbq or a trip to one of 50 destinations. I chose the bbq and she told me it would be delivered the following day. When the guy showed up at the door, in a sporty blue vehicle with BC plates 796 KMN, he said he was there to do a demonstration. i told him i wasn't interested in a demonstration and just wanted the prize. He feigned surprise and said he had to make a phone call. He got back in his car and drove off, without any explanation. I called the number, (604) 520-3565, for an explanation. Whoever answerd the phone said it's always made clear in the initial phone call that they are coming to do a demonstration. Not at all the case. The guy on the phone was very reluctant to provide info. He finally provided his address as 226 17 Fawcet Rd, Coquitlam. He said the sell Filter Queen Vacuum parts. He woudn't give me his business registration or tax number. Definitely a big waste of time. Completely unprofessional. I doubt they actually sell anything.

Don't believe those commenting here who claim that these calls are not being done on behalf of Healthtek Enterprises.. they are. They are sleazy, bottomfeeders, who use these techniques to prey on people.
They claim they are doing a "survey" and may claim you get a "prize" for participating, then will dispatch a shady salesperson to your home to do a demonstration - and try to force you to buy an unecessary, overpriced, crappy vacuum or air filter. If you want to know how Healthtek operates, I urge you to read this one story: http://thetyee.ca/Life/2009/02/02/ElderlyAunt/
And if they're calling you, call their office, get removed from their lists, and report them to the authorities.

This # has called 5 times in 24 hours. No one is on the other end.

This number called twice, last night and tonight. Both times the lady stated she had six questions for me the first being if anyone in my family smokes or if we have an air purifer.  I asked why I had to answer these questions and was not given an answer.  I then stated both times to remove my number from their list and hung up.

Don't believe those commenting here who claim that these calls are being done on behalf of Healthtek Enterprises.. they are. They are sleazy, bottomfeeders, who use these techniques to prey on people.They claim they are doing a "survey" and may claim you get a "prize" for participating, then will dispatch a shady salesperson to your home to do a demonstration - and try to force you to buy an unecessary, overpriced, crappy vacuum or air filter. If you want to know how Healthtek operates, I urge you to read this one story: http://thetyee.ca/Life/2009/02/02/ElderlyAunt/And if they're calling you, call their office, get removed from their lists, and report them to the authorities.