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NG BLU+ STAR 18,000 BTU Single-Zone Cold Climate Heat Pump - 24.0 SEER2, 208/230V - BLU+ STAR wall-mounted indoor head
NG BLU+ STAR 18,000 BTU Single-Zone Cold Climate Heat Pump - 24.0 SEER2, 208/230V - Indoor head, condenser, line set and remo
NG BLU+ STAR 18,000 BTU Single-Zone Cold Climate Heat Pump - 24.0 SEER2, 208/230V - Outdoor inverter condenser, front view
NG BLU+ STAR 18,000 BTU Single-Zone Cold Climate Heat Pump - 24.0 SEER2, 208/230V - WiFi app control shown in a bedroom
NG BLU+ STAR 18,000 BTU Single-Zone Cold Climate Heat Pump - 24.0 SEER2, 208/230V - Backlit LCD wireless remote control

NG BLU+ STAR 18,000 BTU Single-Zone Cold Climate Heat Pump - 24.0 SEER2, 208/230V (OMSTAR181E / IMSTAR181E)

Regular price $1,889.06

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NG BLU+ STAR 18,000 BTU Single-Zone Cold Climate Heat Pump - 24.0 SEER2, 208/230V (OMSTAR181E / IMSTAR181E)

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NG BLU+ STAR 18,000 BTU Single-Zone Cold Climate Heat Pump - 24.0 SEER2, 208/230V (OMSTAR181E / IMSTAR181E)

DESCRIPTION

At 24.0 SEER2 this is the most efficient single-zone system NG publishes, and it holds 14,500 BTU/h at 17°F, roughly 80 percent of nominal heating capacity, which is the number to look at when sizing for a cold-climate design day. Sized for open living areas and finished basements in the 700 to 1,000 square foot range. ENERGY STAR qualified, so it should be checked against local utility rebate lists and the 25C credit before the customer buys.

Specifications

Indoor unit model IMSTAR181E
Outdoor unit model OMSTAR181E
Nominal cooling capacity 18,000 BTU/h (3,600 - 20,000 BTU/h)
Nominal heating capacity 18,000 BTU/h (7,600 - 22,000 BTU/h)
SEER2 / EER2 24.0 / 13.5
HSPF2 (Region IV / Region V) 11.1 / 8.3
Heating H32 rated / COP 13,000 BTU/h / 2.60
Heating H42 rated / COP 13,000 BTU/h / 2.35
Heating at 17°F 14,500 BTU/h
Heating at 5°F 13,000 BTU/h
Heating at -4°F 9,700 BTU/h
Heating at -13°F 7,900 BTU/h
Cooling at 109°F 14,500 BTU/h
Cooling at 5°F 20,500 BTU/h
Power supply 208/230V / 60Hz / 1Ph (187 - 253V)
Cooling input / current 1,333W / 6.0A
Heating input / current 1,385W / 6.2A
Indoor MCA / max fuse 3.0A / 15A
Outdoor MCA / max fuse 18.0A / 20A
Refrigerant R-454B (A2L), 47.97 oz factory charge; 0.16 oz/ft additional
Line set 1/4 in. liquid, 1/2 in. gas
Max line length / height difference 98.4 ft / 65.6 ft
Indoor airflow (Turbo/Hi/Mi/Lo) 759.3 / 500.3 / 441.4 / 370.8 CFM
Indoor sound level 54 / 45 / 40.0 / 26 / 20 dB(A)
Outdoor sound level 59.0 dB(A)
Compressor GMCC rotary, 4,315W
Indoor dimensions (W x D x H) 42.60 x 9.21 x 13.27 in.
Outdoor dimensions (W x D x H) 35.04 x 13.46 x 26.50 in.
Net / gross weight (indoor) 30.42 / 39.68 lb
Net / gross weight (outdoor) 92.59 / 100.31 lb
Outdoor operating range -13 - 122°F cooling, -13 - 75°F heating

About the BLU+ STAR Series

BLU+ STAR is the ENERGY STAR-qualified tier of the R-454B lineup. Every model in the series operates down to -13°F outdoor ambient in heating mode and publishes full low-temperature capacity tables at 17°F, 5°F, -4°F and -13°F, which is what utility and tax incentive programs generally ask for. ETL listed to UL 1995 and CSA C22.2 No. 236, AHRI certified, WiFi enabled.

Installation and compliance

R-454B and R-32 are A2L refrigerants, classified as mildly flammable. Installation, charging and service must be performed by a licensed HVAC contractor holding EPA Section 608 certification and trained on A2L handling. Local code may require leak detection, minimum room volume per pound of charge, or specific line set materials. Verify requirements before quoting.

Specifications are taken from the manufacturer's published data sheet and are subject to change without notice. Confirm capacity, electrical requirements and refrigerant charge against the documentation shipped with the unit before installation.

Contact Info


Willard’s HVAC Supply, LLC

311 Belair Road
North Augusta, SC 29841

Phone: (803) 510-7290
Email: support@willardshvacsupply.com

Use our live chat to text with us.

Hours: Mon–Fri 8AM–5PM (EST)

Shipping Policy

At Willard's HVAC Supply, we take pride in fast, reliable shipping for both standard and freight orders. Please review our shipping terms carefully to understand how your order will be processed and delivered.

1. Shipping Destinations

We ship to the contiguous United States (lower 48 states) only. We do not ship to Alaska, Hawaii, P.O. boxes, APO/FPO addresses, or international destinations.


2. Shipping Costs

We offer free standard shipping on all orders. Freight shipments are included at no additional shipping charge unless optional services such as liftgate delivery are requested.


3. Carriers Used

We ship using a combination of standard parcel carriers (UPS, FedEx, USPS) and LTL freight carriers depending on the size, weight, and type of product ordered.


4. Order Cutoff Time & Handling Time

  • Order Cutoff Time: 2:00 PM EST, Monday through Friday.
  • Orders placed by 2:00 PM EST on a business day will begin processing the same day.
  • Orders placed after 2:00 PM EST, or on weekends and holidays, will begin processing the following business day.
  • Handling Time: All orders are processed and shipped within 1 business day of payment confirmation.


5. Estimated Transit Time

  • Standard Ground (Non-Freight): 3–5 business days after shipment. Carriers deliver Monday through Saturday.
  • Freight Orders: 5–7 business days after shipment depending on destination. LTL freight carriers typically deliver Monday through Friday.


6. Freight Shipping Details

  • Freight shipments are delivered curbside to commercial or residential addresses.
  • The customer is responsible for unloading the item(s) from the truck unless a liftgate service is purchased or included.
  • Inspect all freight deliveries before signing the carrier's delivery receipt. Note any visible damage immediately and contact us within 24 hours at support@willardshvacsupply.com.


7. Tracking Information

Once your order ships, a tracking number will be provided via email. Freight shipments may include a Bill of Lading (BOL) number for status updates through the carrier's website.


8. Missing or Undelivered Orders

If you have not received your order within the estimated delivery window, please take the following steps:

  1. Check your tracking number or BOL number for the latest carrier update.
  2. Allow 1–2 additional business days, as carrier delays occasionally occur.
  3. If your order still has not arrived, contact us at support@willardshvacsupply.com with your order number and we will investigate and resolve the issue promptly.


9. Delays Beyond Our Control

While we strive to meet all delivery timelines, Willard's HVAC Supply is not responsible for carrier delays caused by weather, natural events, or other circumstances beyond our control.


10. Contact Us

For any questions about shipping or tracking your order, please contact us at:

Email: support@willardshvacsupply.com

Refund & Return Policy

Return, Exchange & Limited Refund Policy

Effective Date: May 26, 2026 Willards HVAC Supply LLC | 311 Belair Rd, North Augusta, SC 29841

Exchange-Only Policy

At Willards HVAC Supply, all approved returns are handled as exchange-only returns, regardless of the reason for return, including but not limited to seller error, shipping issues, wrong item received, defective merchandise, compatibility concerns, or customer ordering mistakes.

We do not guarantee refunds, and all return requests for an exchange must be made within seven days of delivery. Failure to do so will result in the rejection of your request regardless of whether the problem is due to our error or not.

Approved returns may be resolved through one or more of the following remedies, at our sole discretion:

  • Exchange for the same item
  • Replacement of the item
  • Exchange for an equivalent item of similar function or value
  • Store credit for future purchases

Limited Refund Exception

If an approved returned item cannot reasonably be replaced or exchanged because inventory is unavailable, discontinued, or otherwise not obtainable, Willards HVAC Supply may choose, at its sole discretion, to issue a refund to the original payment method.

Refunds are not guaranteed, are not a customer entitlement, and are issued only at the sole discretion of Willards HVAC Supply.

Seller Error / Wrong Item / Shipping Error

If we ship the wrong item, incorrect quantity, or an incorrectly labeled item, please notify us within 7 calendar days of delivery. Once approved, we will provide return instructions and prepaid return shipping.

Upon receipt and inspection of the returned product, we will resolve the matter through an exchange, replacement, equivalent product, or store credit, at our sole discretion.

If replacement inventory is unavailable, we may, but are not obligated to, issue a refund.

Customer Remorse / Compatibility / Wrong Part Ordered

Because HVAC products are highly technical and application-specific, returns for wrong part ordered, compatibility issues, misdiagnosis, change of mind, or pricing concerns are generally not accepted unless approved by Willards HVAC Supply.

If approved, any return resolution will be exchange-only and not a refund, except where Willards HVAC Supply elects otherwise in its sole discretion.

Defective Products / Warranty Claims

Defective items covered under our seller warranty will be resolved through repair, replacement, exchange, equivalent product, or store credit, at the sole discretion of Willards HVAC Supply.

Refunds are not guaranteed and may only be issued if replacement options are unavailable and Willards HVAC Supply elects to do so.

Doing Business With US

  • RETURNS ACCEPTED
    We will gladly send an exchange for your part.
  • DISCOUNTS AVAILABLE
    Contact us for savings.
  • IMMEDIATE PHONE SUPPORT
    (803) 510-7290
  • FREE SHIPPING
    Free shipping on all orders.
  • FAST DELIVERY
    Orders ship within 24 hours.
  • CHAT SUPPORT
    Your preference for communication.
  • PRICE MATCH
    We will price-match most competitors.
  • SMALL BUSINESS
    Support a small business in the USA.
  • INFORMATION PRIVACY
    Top industry standards for security.