This is an amazing company I used to sell me and install my new natural gas furnace. I am so grateful I found this company by researching quite a few HVAC companies and their reviews. I found that Greentop Heating to be very ethical, honest, trustworthy, and a reliable company. Initially, Igor came to check out the problem. I had an old furnace a little past due for replacement. The owner of Greentop Heating, Ruslan suggested that I should replace the old furnace due to its age. Ruslan soon gave me a very reasonable estimate for a new American Standard furnace. I approved the estimate after a day or so. I am a senior and had no heat so Ruslan was kind to have the furnace job scheduled right away. Heating installation technicians Adrian and Dylan arrived promptly at the scheduled start time and soon they were busy replacing the old furnace. They did a great job and left a clean site even though it was pretty rainy and a little muddy outside. They covered my carpet and wore boot covers. They paid a lot of attention to detail. After the installation they found out that there was a problem with the thermostat wire. The next day they sent number one technician John to work on the thermostat problem and he an Dylan had the problem resolved after a discussing a couple options with me. I was so pleased with the responsiveness of this company. They are a very integrity-driven, conscientious business. I am so grateful I chose this amazing business for my new natural gas furnace. I have been nice and warm and I am very happy with the properly sized American Standard furnace. Thank you, Ruslan, and the crew of competent technicians. Number one tech, (John) you, are amazing and I am so glad to have met you.