While HVAC makers, in general ... Senville’s pricing starts at around $700 for a single-room model. One of its 20-SEER 9,000-BTU units, capable of conditioning a 450-square-foot room, retails ...

Check the Seasonal Energy Efficiency (SEER) ratio of each unit you ... How long do HVAC units last? The average HVAC unit lasts between 10 and 20 years. According to Pritchard, “The lifespan ...