AC Academy
AC Academy
Sizing, install planning, and efficiency guides from our HVAC experts.
Latest guide
Best DIY Mini Split for Cold Climates: Hyper Heat vs 5th Gen
For most cold-climate DIY buyers, the MRCOOL DIY 5th Gen Hyper Heat is the best pick. MRCOOL rates it to keep heating down to -22°F outside. The standard MRCOOL DIY 5th Gen is rated to -13°F, costs...
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What Size Range Hood Do I Need? Width and CFM Made Simple
Pick a range hood at least as wide as your range, and 3 to 6 inches wider when you can. Then use simple HVI airflow numbers and the gas B...
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Is MRCOOL a Good Brand? An Honest Look Before You Buy
Yes, MRCOOL is a good brand for homeowners who want a ductless heat pump they can install themselves. See who makes MRCOOL, real warranty...
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What Do You Need to Buy for a 2-Zone DIY Mini Split?
A clear 2-zone DIY mini split shopping list: two heads, two line sets, and the extras you still need. Built for heating-season buyers.
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Can a Mini Split Replace Your Furnace?
Thinking of swapping your furnace for a mini split this fall? Learn when it works, when to keep backup heat, and what to plan before you ...
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Should You Buy a DIY Mini Split in Fall? What to Know About a Cold Weather Install
Thinking about a DIY mini split this fall? Learn why fall is a smart time to buy, how to plan a cold weather install, and what to check f...
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Why Is My Mini Split Blowing Cold Air in Heat Mode?
Switched your mini split to Heat and got cool air, no air, or steam outside? Learn what's normal this fall, what to check, and when to call.
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Can I DIY a Mini Split If I’ve Never Done HVAC? An Honest Checklist
Can I DIY a Mini Split If I’ve Never Done HVAC? An Honest Checklist You’ve never evacuated a line set. You’ve never charged refrigerant. ...
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Why Is My DIY Mini Split Turning On and Off?
Why Is My DIY Mini Split Turning On and Off? Your DIY mini split runs, stops, then starts again a few minutes later. The room never quit...
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DIY Mini Split First Week: What’s Normal (Quiet + Cold Air) vs What Means Fix It
Just installed a DIY mini split? Here’s what to expect in the first week and the warning signs that mean recheck the install or call supp...
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What Size Mini Split Do You Need for a Garage or Workshop?
Choose a garage or workshop mini split using square footage, insulation, ceiling height, climate, door use, voltage, and real installatio...
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What Comes With a MRCOOL DIY Mini Split? A Complete Buying Checklist
See what normally comes with a MRCOOL DIY mini split, what is commonly sold separately, and what to check before placing your order.
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