HVAC Installation Questions

A straightforward AC or furnace replacement typically takes 4-8 hours (one day). Complete system replacements may take 1-2 days. New construction or complex installations involving ductwork modifications can take 2-5 days. Your installer should provide a timeline based on your specific project.

Yes, HVAC installations typically require permits in most jurisdictions. Permits ensure work meets safety codes and is properly inspected. Reputable contractors handle permitting as part of the installation. Unpermitted work can affect insurance claims, home sales, and may be unsafe.

Replacing both together is often recommended because: matched systems perform better together, you avoid paying twice for labor, new equipment ensures compatible efficiency ratings, and you won't have an old component fail shortly after installing a new one. However, if one unit is newer, separate replacement may be fine.

Key factors: proper licensing and insurance, established local reputation, manufacturer certifications, detailed written estimates, willingness to perform load calculations, professional appearance and communication, clear warranty terms, and references from recent customers. Avoid unusually low bids that may indicate shortcuts.

A load calculation (Manual J) determines the exact heating and cooling capacity your home needs based on size, insulation, windows, orientation, and climate. Proper sizing ensures comfort and efficiency. Oversized equipment wastes energy and causes humidity problems; undersized equipment can't keep up.