OLMO Sierra 18,000 BTU Outdoor Condenser, 230V, R410A - Mini Split Air Conditioner Heat Pump

R410A
OLMO Sierra 18k BTU outdoor condenser with R410A refrigerant, silver grille, fanOLMO Sierra 18k BTU outdoor condenser with R410A refrigerant, silver grille, fan
OLMO Sierra 18k BTU outdoor condenser with R410A refrigerant, silver grille, fan

OLMO

OS-MSR18-230VO
Product specifications
Brand Olmo
Voltage 230V
SEER 23.4
WiFi Not Included
Type Outdoor Unit
Freon R410A
Compressor Inverter
$784.00 Sold out
Shipping Policy calculated at checkout.

⛔ Wait! This is an Individual Component To build a working system, this unit must match your other equipment in two ways:

  • Same Brand Only: Only pair with other same Brand and Series.
  • Same Refrigerant: Both units must use the exact same gas type (R454B, R32, or R410A).

Mixing different brands or refrigerant types will cause the system to fail and void your warranty.

Pickup currently unavailable at 3550 Northwest 113th Court

Hurry to buy! Get your mini-split system with R-410A refrigerant (offer valid until November 27)
Important info
  • R-410A is being phased down in favor of newer refrigerants; inventory is limited.
  • Existing R-410A systems remain serviceable; parts and qualified service are widely available.
  • Check local codes and rebates. Some incentives prioritize high-efficiency heat pumps (R-32/R-454B).
  • We stock both R-410A and next-gen options—choose what fits your timeline and budget.

Browse: R-410A systems · R-32 · R-454B

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Sierra Wall Mount

OLMO's Multi-Zone Sierra Series is a versatile HVAC solution designed to provide efficient heating and cooling for multiple rooms, equipped with advanced inverter technology for precise temperature control and significant energy savings. Using eco-friendly R410A refrigerant, the system ensures reliable performance with minimal environmental impact. Perfect for residential or commercial applications, the Sierra Series offers quiet operation, flexible installation, and user-friendly controls, making it an ideal choice for maintaining year-round comfort across multiple zones with one efficient system.
White multi-zone sierra air conditioner with shield logo and checkmark.

Warranty and Tech Support Info

By selecting OLMO products for your home or business, you’ll receive expert technical support from heating and cooling specialist, including access to product manuals, troubleshooting guides and warranty information.

The manufacturer provides a Limited Warranty of 5 years for the compressor and 2 years for parts.

Warranty terms
White wall-mounted air conditioner with sleek design and modern aesthetic.

Main Features

OLMO's Multi-Zone Sierra Series delivers efficient multi-room comfort with advanced inverter technology for precise temperature control. Its eco-friendly R410A refrigerant reduces environmental impact, while quiet operation ensures minimal disruption. With flexible installation options, sleek design, and reliable heating and cooling, it’s the perfect solution for modern multi-zone climate control needs.

Technical Specifications

Indoor Models OS-M09SRW-230VI OS-M12SRW-230VI OS-M18SRW-230VI OS-M24SRW-230VI
Power Supply V-Ph-Hz 208/230V-1Ph-60 208/230V-1Ph-60 208/230V-1Ph-60 208/230V-1Ph-60
Cooling
Capacity Btu/h 9000 12000 18000 23400
Heating
Rated Capacity Btu/h 9500 13000 19000 26000
Output Power W 25 25 35 35
Rated Current A 0.11 0.11 0.17 0.17
Indoor Air Flow CFM 341 365 647 706
Indoor Noise Level (Hi/Mi/Lo) dB(A) 39/35/30 39/35/30 45/41/37 47/45/42
Net Dimensions (WxHxD) in 32.02x10.75x8.13 37.38x10.75x8.13 48x12.63x9.25 48x12.63x9.25
Packing (WxHxD) in 39.38x13.19x6.38 39.38x13.19x6.38 51.75x15.44x12.50 51.75x15.44x12.50
Net/Gross Weight lbs 19.84 / 24.25 19.84 / 24.25 31.97 / 37.48 31.97 / 37.48
Refrigerant Piping
Liquid Side / Gas Side in 1/4" / 3/8" 1/4" / 3/8" 1/4" / 1/2" 3/8" / 5/8"
Outdoor Models OS-MSR18-230VO OS-MSR24-230VO OS-MSR36-230VO OS-MSR42-230VO
Power Supply V-Ph-Hz 208/230V-1Ph-60 208/230V-1Ph-60 208/230V-1Ph-60 208/230V-1Ph-60
Capacity Btu/h 18000 24000 32000 42000
Cooling
EER2 Btu/h 12.5 12.5 12.5 10.5
SEER2 Btu/h 21.0 22.0 21.0 20.0
Heating
Rated Capacity Btu/h 18000 24000 36000 42000
HSPF2 Btu/h 9.50 9.05 9.00 8.95
COP2 W/W 3.45 3.66 3.37 3.17
Minimum Circuit Ampacity A 23 25 32.2 35
Max Fuse A 30 30 50 50
Outdoor Air Flow (Hi) CFM 1850 2350 3411 3411
Outdoor Side Noise Level dB(A) 55 55 59 63
Dimensions (WxHxD) in 33.88×26.38×12.25 37.38×33×13.38 37.38×41.38×13.38 37.38×41.38×13.38
Outdoor Unit Packing (WxHxD) in 39×17.75×28.75 43.75×18.13×36.25 43.75×18.13×47.25 43.75×18.13×47.25
Net/Gross Weight lbs 116.8/125.6 158.7/169.5 188.5/220.5 198.4/224.5
Refrigerant
Refrigerant Type/Quantity oz R410A/63.49 R410A/81.13 R410A/105.82 R410A/120
Refrigerant Precharge ft 50 75 98 98
Refrigerant Piping
Liquid Side / Gas Side in 1/4" / 3/8" 1/4" / 3/8" 1/4" / 3/8" 1/4" / 3/8"
Max Refrigerant Pipe Length Each/Total ft 82/164 66/197 66/246 66/262
Ambient Temperature
Outdoor (Cooling) °F 14~114.8 14~114.8 14~114.8 14~114.8
Outdoor (Heating) °F -13~75.2 -13~75.2 -13~75.2 -4~75.2

Multiple Control Methods

Olmo’s can be managed with a user-friendly remote control. This options offer precise temperature adjustments and optimal climate control for ultimate convenience.

App Promo

Frequently Asked Questions

What size mini split do I need for my room?

For spaces up to 850 sq ft, the Olmo Sierra 18,000 BTU outdoor condenser is an excellent choice. This unit provides sufficient cooling and heating capacity for medium to large-sized rooms.

How much does a mini split system like the Olmo Sierra cost?

The price of the Olmo Sierra 18,000 BTU mini split system can vary based on installation kits and local labor costs. Typically, you can expect to invest in the range of $1,500 to $3,000, depending on the complexity of installation.

Can I install the Olmo mini split myself?

While it is possible to install the Olmo Sierra mini split system yourself, it requires knowledge of HVAC systems, especially since it operates on 230V. For optimal performance and warranty coverage, professional installation is recommended.

Does the Olmo Sierra mini split come pre-charged with refrigerant?

Yes, the Olmo Sierra mini split system comes pre-charged with R410A refrigerant for up to 25 ft of line set, making installation easier. Ensure that you follow the manufacturer’s guidelines during installation for optimal performance.

What is the warranty on the Olmo Sierra mini split system?

The Olmo Sierra mini split system is backed by a 5-year parts and compressor warranty, providing peace of mind for your investment. Make sure to register your product to take full advantage of the warranty coverage.

What does the SEER rating of 23.4 mean for the Olmo Sierra?

The Olmo Sierra mini split system boasts a high SEER rating of 23.4, indicating excellent energy efficiency. This means lower energy bills and a smaller carbon footprint while providing effective cooling and heating.

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