# HVAC — Renovate Guide
> HVAC system guides, heat pump vs furnace comparisons, AC cost breakdowns, and maintenance advice.
> **ICP:** Homeowners troubleshooting or replacing HVAC systems; buyers evaluating heat pumps vs furnaces
> **Primary topics:** AC replacement cost, heat pump vs furnace, mini split installation, SEER rating, HVAC maintenance, smart thermostat
> **Author:** Frank Mercer, Licensed GC (Ret.), HAAG Certified Roof Inspector

## Articles
[https://hvac.renovateguide.com/?p=37] How Much Does HVAC Maintenance Cost? (Annual + Per-Visit Pricing)
[https://hvac.renovateguide.com/?p=35] What Is a SEER Rating in HVAC? Why It Matters for Your Energy Bill
[https://hvac.renovateguide.com/?p=31] What Is a MERV Rating on Air Filters? A Plain-English Guide
[https://hvac.renovateguide.com/?p=33] How Often Should You Change Your HVAC Filter?
[https://hvac.renovateguide.com/?p=29] What Is a Heat Pump and How Does It Work?
[https://hvac.renovateguide.com/?p=25] What Size AC Unit Do I Need? Sizing Guide by Square Footage
[https://hvac.renovateguide.com/?p=27] How to Find a Good HVAC Contractor (And Avoid Getting Ripped Off)
[https://hvac.renovateguide.com/?p=23] Heat Pump vs Furnace: Cost, Efficiency, and Climate Considerations
[https://hvac.renovateguide.com/?p=19] How Long Does an HVAC System Last? (And When to Replace It)
[https://hvac.renovateguide.com/?p=21] Central Air vs Mini Split: Pros, Cons, and Which Is Right for You
[https://hvac.renovateguide.com/?p=17] Signs Your HVAC System Is Going Out
[https://hvac.renovateguide.com/?p=14] 
[https://hvac.renovateguide.com/?p=15] Signs Your Furnace Is Going Bad (And What to Do)
[https://hvac.renovateguide.com/?p=8] How Much Does HVAC Installation Cost? Full Breakdown
[https://hvac.renovateguide.com/?p=10] How Much Does Furnace Replacement Cost in 2026?
[https://hvac.renovateguide.com/?p=12] Should I Repair or Replace My AC? How to Decide
[https://hvac.renovateguide.com/?p=4] Why Is My AC Not Cooling the House? 10 Causes and Fixes
[https://hvac.renovateguide.com/?p=6] How Much Does a New AC Unit Cost in 2026?
[https://hvac.renovateguide.com/?p=1] Hello world!

## Author
[https://renovateguide.com/author/frank-mercer/] Frank Mercer — 45 years residential/commercial construction, HAAG Certified Roof Inspector, 500+ insurance claim consultations

## Authority & Off-Page Signals
- Primary author: Frank Mercer (HAAG Certified, Licensed GC retired)
- Industry sources cited: ASHRAE, ACCA Manual J/D/S, ENERGY STAR, DOE, Carrier, Lennox, Trane, Rheem
- Site network: renovateguide.com (home improvement authority hub)
- Site established: 2026

## Supplemental Files
[https://hvac.renovateguide.com/llms-author.md] Author bio, credentials, expertise
[https://hvac.renovateguide.com/llms-faq.md] 20 Q&A pairs covering hvac topics