I am a home service technician, and I recently completed a furnace replacement job for a client. The old furnace was over 20 years old and had been causing the client's energy bills to skyrocket. I replaced the old furnace with a new, high-efficiency model that is more energy-efficient and will save the client hundreds of dollars on their energy bills each year. The installation process took several hours, but the client was pleased with the results. I also provided the client with a maintenance checklist to ensure that the new furnace runs smoothly for years to come.