I did some checking and these calls are coming from a company called Green Relief Project.  It is a call center located in Tempe, Arizona.  They have a toll free number 888-912-1667 and an e-mail address:  INFO@GREENRELIEFPROJECT.COM.  If you want to work in their call center you can call 480-447-4642 and ask for Erick.  You can also visit them at their physical address of 740 S. Mill Ave.  Suite 220 Tempe, AZ 84281  Looking the address up on Google maps and looking at street view I am not so sure this is legit but, this is the information they give on their answering system.

They have called me after I got a new furnace/AC and after I talked with Rocky Mountain Power regarding a mailing I received about central AC and heat pump tune-ups.  

Thank you for the info. Just called the number back and unsubscribed my phone number.

These pests called me 6 times in 4 days.

These idiots call constantly acting like they are calling to help me with energy conservation...they are parasites trying to rip me off!!

Constantly calls, no message, just calls and calls and calls.  One day I was home, I picked up the phone, you can hear someone in the background, but no one will say anything.  It is obviously a call center, they must get paid by the numbers dialed and the number of seconds that have the line engaged, or else why would they call, not leave a message, not speak when spoken to,  I am getting so tired of the constant calls.  I have filed multiple complaints with the Do Not Call list, guess that doesn't work.

Constantly calling without leaving a message.

Repeated calls.  Never leave mssg.  Tired of being bothered.  What good is Do Not Call list?

Home energy

Interesting to know who this is.  We just had a high efficiency furnace installed this week and yesterday I applied for a rebate with Questar and now we are getting these calls.  Must be a correlation.

Called last week and I told them I wasn't interested and don't call me again. This morning they called again, this time
they said it was not a sales call and that they were gathering information on eligibility of energy tax credits. I said it is
a sales call and she said that she was "pretty much" working for the government. I said "pretty much"? Let finish this
for you...you are going  to give this info to somebody and it won't be the government...DO NOT CALL ME AGAIN!
And I will be filing a complaint!

They are calling to sell you products for energy savings.  Call back and remove your numbers from their database.  Otherwise, get auto dialed to death.  Better yet, block them.

Who r they?  Anyone know

Who are they.. Never leave message...

These guys are idiots.

This RUDE person calls us constantly and never leave a message. I am tired of being interruptions in my life with this rude nonsense!

Calls several times a week, never left any message