Also read: this brand on other pages
Same manufacturer, different equipment focus—so you get intent-matched detail without duplicate canonical URLs.
Fujitsu Halcyon XLTH Extra Low Temperature Heating
Model Number: ASU9RLS3Y
The XLTH series delivers full heating output down to -15°F — the lowest operating temperature in the industry. Purpose-built for extreme cold climates.
Technical Specifications
33
SEER2
13.8
HSPF2
1
Zone
Noise Levels
Key Features
Extra Low Temperature Heating to -15°F
33.0 SEER2 efficiency
ENERGY STAR Most Efficient
Ion deodorizing filter
FujitsuGeneral app control
Pros & Cons
Pros
- Industry-best -15°F cold climate rating
- 33.0 SEER2 — top-tier efficiency
- Ultra-quiet 18 dB indoor unit
- Excellent value vs Mitsubishi H2i
Cons
- Fewer multi-zone options than Mitsubishi
- Smaller dealer network
- 10-year warranty vs 12-year competitors
Best For
Extreme cold climates (northern US, mountain regions)
Warranty Snapshot
Compressor: 10 years
Parts: 10 years
Register equipment with the manufacturer after installation to preserve coverage. We handle registration on Homets installs.
Similar Mini Splits
Other ductless systems with similar efficiency from different brands.
Frequently Asked Questions
Ready to Install the Halcyon XLTH?
Get a free, no-obligation quote for professional mini-split installation by NATE-certified technicians serving Nassau County. You may qualify for a $2,000 federal tax credit!

