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Three tools we built for our own guides, free to use and free to embed. No sign-up, no email required.
Enter square footage, climate, insulation and ceiling height for a starting BTU and tonnage range. Built to agree with the reference table it sits beside, and explicit that it does not replace a Manual J calculation.
Open the toolEstimate an installed price range for your situation, and see which parts of the quote move the number most.
Open the toolType a fault code from a Mitsubishi, Daikin, LG, Fujitsu or Carrier system and see what it points to and what you can safely check.
Open the toolThe sizing estimator is free to embed, including on commercial sites. There is no charge, no attribution requirement beyond the link the widget already carries, and no tracking beyond what your own page does. Paste this where you want it to appear:
<iframe src="https://heatpumpwise.org/tools/sizing-calculator/"
width="100%" height="620" style="border:0;max-width:760px"
title="Heat pump sizing estimator by HeatPumpWise"
loading="lazy"></iframe>The widget is responsive and reports its own height, so it fits a narrow column as well as a full-width article. If you would rather link than embed, the full sizing guide explains what the estimate can and cannot tell you.
Equipment brand accounts for a small share of how your system performs. Installation quality accounts for most of it. Screen the installer harder than the box.
Start with the two possibilities that are completely normal, then work through the five that are not. Most cases resolve without a service call.
Mitsubishi reports faults as two-character codes and as LED blink patterns. Here is how to retrieve a code and what the major families of codes point to.
A light coating of frost in winter is expected. A block of ice encasing the coil or ice on the top of the unit is a problem you should not ignore.