Resources & guides
HVAC Installation Blog
Cost guides, system comparisons, and tips for getting your AC, furnace, heat pump, or mini-split installed.
Sizing Guide · October 2026
What Size Heat Pump, AC or Furnace Do I Need?
Why square-foot rules of thumb mislead, how ACCA Manual J, S and D size a system, sizing heat pumps for cold climates, and what to ask about a load calculation.
Read the guide →Efficiency Guide · October 2026
SEER2, EER2 and HSPF2 Explained: What the Ratings Mean
What each efficiency rating measures, the U.S. Department of Energy regional minimums since 2023, ENERGY STAR and CEE levels, and how to turn a rating into kWh.
Read the guide →Cost Guide · September 2026
HVAC Installation Cost in 2026: What Homeowners Actually Pay
Per Angi data published by This Old House: central AC $4,000–$8,000, gas furnace $3,800–$10,000, heat pump $4,500–$8,000 installed. 2026 breakdown by system type, A2L refrigerant impact, and how to compare quotes.
Read the guide →Emergency Guide · Updated October 2026 · Chicago
Emergency AC Installation in Chicago During a Heat Wave: What to Do
What to do if your AC fails in a Chicago heat wave: asking for quotes early, the permit, and how to stay cool while you wait.
Read the guide →Cost Guide · May 2026
AC Installation Cost in 2026: What Homeowners Actually Pay
Central AC costs $4,000–$8,000 installed, per Angi data published by This Old House. New installs with ductwork go higher. Breakdown by system type, size, and what drives the price.
Read the guide →Buying Guide · May 2026
7 Signs Your AC Needs Replacing (Not Just Repairing)
Before another summer repair bill, here's how to tell whether your air conditioner is worth fixing — or whether replacement is the smarter call.
Read the guide →System Comparison · May 2026
Heat Pump vs. Central Air: Which Is Right for Your Home?
Both cool your home. But a heat pump also heats it — often at a fraction of what gas costs. A practical comparison of cost, efficiency, and rebate eligibility.
Read the guide →Rebates & Incentives · Updated Sep 2026
Heat Pump Rebates 2026: 25C Is Gone — Here's What's Still Available
The Section 25C heat pump tax credit expired Dec 31, 2025. Fall 2026 update: HEAR no longer covers gas-to-heat-pump swaps, which states have run out of funding, and the utility rebates that remain.
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