R410A — LAST CHANCE LINEUP
Shop the final wave before the transition—premium layout, quick comparison, limited inventory.
R410A
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Why shop with OLMO?
Why OLMO?
Pro-grade gear with pro-grade service.
Fast lead times
Stocked & ready to ship.
Customer Service 8–6 CST
Real humans, real help—Mon–Fri.
Bulk deals
Volume pricing for contractors.
Adjustable quotes
Tailored to your project & budget.
Ductless Mini Split Comfort - Your trusted OLMO DEALER
Quiet. Efficient. AFFORDABLE. OLMO.
Ductless comfort engineered for modern homes—high SEER2 performance, low noise, dependable support.
Free Shipping over $300
No Sales Tax in Most States*
US-Based Customer Support
Bulk Discounts Available
Shop by System
Featured Lines
Alpic Series
High-efficiency single-zone comfort with quiet operation.
Sierra Single-Zone
Reliable heating & cooling for individual rooms and add-ons.
Sierra Multi-Zone
Whole-home zoning with matched indoor units and one condenser.
Find Your Size
9,000 BTU — small rooms up to ~350 sq ft
12,000 BTU — medium rooms ~350–550 sq ft
18,000 BTU — large rooms ~550–800 sq ft
24,000 BTU — open areas ~800–1,100 sq ft
36,000 BTU+ — great rooms / multi-zone
Why Choose OLMO
High SEER2 Efficiency
Engineered for lower energy use with inverter technology.
Low Noise, Real Comfort
Stable temperatures and quiet indoor units for everyday living.
Warranty & Pro Support
Solid coverage and U.S. techs by phone when you need help.
Mini Split Limited Warranty
Warranty overview goes here.
- Compressors: 5 years; Parts: 2 years; Remotes: 1 year.
- Must be installed by a licensed HVAC tech and registered within 60 days.
TTW Limited Warranty
Warranty overview goes here.
- One (1) year limited warranty to the original registered end user.
- Registration required within 60 days of purchase.
- Applies only at the original installation address.
PTAC Limited Warranty
Warranty overview goes here.
- One (1) year limited warranty to the original registered end user.
- Registration required within 60 days of purchase.
- Applies only at the original installation address.
How to register your Warranty
Registration can be completed online. Registering your product is a brief and easy process. You will need to follow the link below:
- https://olmo-comfort.com/warranty
Helpful Olmo Guides
Read tips and guides curated by our seasoned HVAC pros.
TROUBLESHOOTING
Coping with Condensation: Troubleshooting Mini Split Freezing Issues in Cold Weather
OLMO HVAC SOLUTIONS
TECHNICAL BLOG
Winter Freeze-Ups: Why Your Outdoor Heat Pump Is Icing Over
Essential troubleshooting for O...
Read More
MULTI ZONE
Multi-Zone Zoning Strategy: Heating Your Whole Home Comfortably with One OLMO Condenser
OLMO HVAC SOLUTIONS
Installation Guide
Mastering Multi-Zone Comfort
Tired of "Thermostat Wars" in your own home?
Achieving p...
Read More
INFORMATIONAL GUIDE
Heat Pump vs. Furnace: Why Ductless is the More Efficient Winter Choice
OLMO • Quiet • Efficient • Affordable
Heat Pump vs Furnace: Why Modern Homes Are Making the Switch
Furnaces, especially gas furnace...
Read More
INFORMATIONAL GUIDE
TTW vs. Electric Baseboard: The Cheapest Way to Heat Your Apartment or Addition
OLMO HVAC SOLUTIONS
Efficiency Report
Baseboard Heaters vs. Through-the-Wall Units
Is your heating system acting like a giant t...
Read More
DESIGN
3 Smart Layouts for a Multi-Zone Mini Split in a 3-Bedroom Home
OLMO HVAC SOLUTIONS
Residential Comfort Guide
3 Smart Layouts for a Multi-Zone Mini Split in a 3-Bedroom Home
Maximize effic...
Read More
OLMO FAQs
Frequently Asked Questions
What is a ductless mini split system?
A ductless mini-split is a heating and cooling system that moves heat between an outdoor unit and one or more indoor wall, ceiling, or floor-mounted units, without using ductwork.
What products does OLMO offer?
OLMO builds ductless mini splits, TTW units, and casement window ACs with inverter technology and SEER2-focused efficiency.
When was Olmo Established?
1999.
How many rooms can a Multi Sierra outdoor unit handle
OS-MSR18-230VO: up to 2 indoor units
OS-MSR24-230VO: up to 3 indoor units
OS-MSR36-230VO: up to 4 indoor units
OS-MSR42-230VO: up to 5 indoor units
Why does the system go into defrost during heating?
In heating mode, the system may run an automatic defrost cycle to clear frost on the outdoor coil; it can last 2–10 minutes, and the indoor fan may pause during the cycle.
How do I pick the right voltage (115V vs 208/230V)?
Some models are 115V, while others are 208/230V—it varies by model number (especially on TTW units). Always match your home’s power supply to the model’s listed power requirements.
What features do customers love most on TTW units?
Commonly listed TTW highlights include: Sleep Mode, Auto Restart, Timer, Multiple Fan Speeds, Self-evaporative System, Compound Filter, LED Display, and Fresh Air Input.