One of the Harvey windows in my condo fogged up (o...

One of the Harvey windows in my condo fogged up (originally installed 12 years ago). It was under a 20 year warranty. I called the customer service number for Harvey and gave them a number from a label on the top of the top sash. They said they would send me a replacement to a nearby location within 3 weeks. I already know that once I get it, it's very simple to replace. No other information was required, no pictures, nothing else at all. My neighbor already has done this same process very successfully. Customer service rep was very helpful and friendly.