Our rambler has a main furnace/central air system and an addition with a separate furnace and wall A/C unit. Our main HVAC system was 25 years old and close to failing. We also lacked cold air returns, making it difficult to consistently heat/cool the house throughout the year. With that, I set out to replace our main HVAC system and add returns throughout the house.
I took three bids for the project, and Bonfe's was by far the best, most complete solution.
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