Free HVAC Resources
AC Tools, Guides &
Free Downloads
Everything you need to buy, fix, maintain, and understand your air conditioner — free tools, step-by-step guides, checklists, and brand-specific resources, all in one place.
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Tools & Calculators
Free interactive tools to size, troubleshoot, and optimize your AC
Answer 7 questions about your room — size, sun exposure, floor, windows, occupants — and get your exact recommended AC capacity in tons and BTU/hr.
Use BTU Calculator
See how much you could save by switching from a fixed-speed to an inverter AC — based on your local electricity rate, daily runtime, and current unit’s SEER rating.
Coming soon
Describe your AC symptom — not cooling, strange noise, ice build-up, error code — and get a step-by-step diagnosis path and recommended fix or professional referral.
Coming soon
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Free Downloads
Printable checklists, guides, and templates — free for all readers
AC Maintenance Checklist
Spring & Summer 2026 Edition. Monthly, quarterly, and seasonal maintenance tasks for window ACs, mini-splits, and central HVAC — in one printable checklist.
⬇ Download Free PDF
Summer AC Prep Guide
10 things to check before the first hot day of the year. Covers filter replacement, coil cleaning, refrigerant signs, thermostat calibration, and professional service scheduling.
⬇ Download Free PDF
AC Buying Worksheet
Room-by-room sizing worksheet to calculate BTU requirements for every room in your home before visiting a store or buying online. Includes SEER comparison chart.
⬇ Download Free PDF
AC Troubleshooting Cheat Sheet
Most common AC problems and their most likely causes — in a quick-reference format. Covers 15 symptoms from “not cooling” to “error codes” with first-step fixes.
⬇ Download Free PDF
20 Energy Saving Tips
Actionable settings, habits, and upgrades that reduce AC electricity costs — ranked from highest to lowest impact. Based on US DOE and ENERGY STAR recommendations.
⬇ Download Free PDF
More downloads coming
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Buying Guides & Reviews
Researched, independently reviewed picks for every AC category
Product Reviews
7 Best Air Conditioners of 2026 — Tested & Reviewed
Read guide →
Window AC
Best Window Air Conditioners 2026 — Top 7 Picks
Coming soon
Smart HVAC
Best Smart Thermostats to Pair With Any AC (2026)
Coming soon
Energy Saving
10 AC Energy Saving Tips That Cut Bills by 30%
Read guide →
AC Installation
How to Install a Window Air Conditioner — Step by Step
Read guide →
Maintenance
Complete AC Maintenance Guide — Monthly & Seasonal
Read guide →
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Brand-Specific Resources
Guides, repairs, and manuals organized by AC brand
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Browse by Topic
All content organized into 6 core HVAC categories