18,000 BTU Mini Splits

Shop 18,000 BTU mini splits at Home Outlet Direct. Depending on the brand, a 18,000 BTU system covers roughly 750 to 1,000 sq ft, which suits living rooms and master suites.

The 18,000 BTU number is the total system capacity of the outdoor unit. With a single-zone system it can cool one large space. With a multi-zone system it can be split across several rooms, where each indoor head is sized for its own room. Between sizes? Round up. A slightly larger unit runs efficiently at partial load, while an undersized one runs constantly.

This collection includes systems from MRCOOL, Daikin, Senville, and Pioneer. Compare single-zone mini splits, design your own system with the Mini Split Bundle Builder, and add the right mini split line sets for your install.

18,000 BTU mini split FAQ

How many square feet does a 18,000 BTU mini split cover?

About roughly 750 to 1,000 square feet, depending on the brand. Check the BTU guide on each product page for that brand's rating.

Is 18,000 BTU per room or total?

It is the total capacity of the outdoor unit. On a multi-zone system, add up the BTU ratings of the indoor heads, and size each head for the room it serves.

What if my room is between two sizes?

Round up to the next size. A slightly oversized mini split runs efficiently at partial load.