We came back from Vacation to our home we moved into three months ago. While we were away, we set the temperature to 18 degrees. Once home, put the temperature back to normal and it took way too long for the house to heat back up. The vents were warm but almost no air flow. The technician who was very courteous, friendly, and knowledgeable checked the furnace first. It has a multi stage blower which was not kicking into the higher speeds as it should. Turns out many of the vents throughout the house were blocked by the previous owner. He pulled the stuffing out of many vents and tinkered with the settings and it's working as it should. He pointed out that the house is short on return vents and if that was resolved, the motor speeds could be increased even more without placing strain on the motor. We will look into creating more return vents with Husky. First time I used them and very satisfied. The agent on the phone was very friendly and helpful as well. Money well spent.