Mini split price history
Median $ per 1,000 BTU/h across every system with a verified live price that day, measured daily since 2026-09-07.
Loading the recorded series…
Median $ per 1,000 BTU/h across every DIY system with a verified live price on that day. Days on which fewer than two systems had a verified price are not plotted — a “median” of one listing is that listing, not a market.
Why this page exists, and why it starts empty
Price history is the one thing in this category that nobody publishes. The comparison sites that do rank mini splits show today’s number and nothing else, so there is no way for a buyer to tell whether the price in front of them is a genuine seasonal low or simply Tuesday. That gap is the entire reason this site is worth building, and it is why this page went in first rather than last.
It also means the chart has to start empty and fill in one day at a time. We could have seeded it with prices scraped from review articles or reconstructed from memory, and it would have looked far more impressive this week. It would also have been fiction. Every point plotted here was measured by this site, on the day it is plotted against.
How a point is produced
- Once a day the price run fetches every catalogued system from the Amazon Creators API.
- Each returned listing is checked against the catalogued product before its price is accepted. A listing whose title no longer matches, or whose price has moved implausibly since yesterday, is rejected and recorded as a problem rather than written into history.
- Accepted prices are divided by the system’s rated BTU/h and the median across all of them becomes that day’s point. Median rather than average, because one gouged listing drags an average far enough to contradict the table on the front page.
- Rejected and estimated prices never enter the series. A gap in the chart is an honest gap.
What the series can and cannot tell you
It can tell you where today sits against the days we have measured, which is the question most people actually have when they hesitate over a $1,000 purchase. It cannot tell you where prices go next, and this page will never pretend otherwise. Mini split pricing moves on seasonal demand, tariffs on imported equipment and manufacturer rebate cycles, none of which a price series predicts.
One caveat specific to this category: Amazon coupons and limited-time promotions frequently do not appear in the API price, so a listing can show a lower number on Amazon than the one recorded here. That is why every row links straight to the listing and why the disclaimer below is not decoration. Where the two disagree, Amazon is right.
Back to the full $/BTU ranking · What counts as a good price per BTU