Gray North 12×21-1/2 to 18″ Round Gas Pack Rectangular Duct Adapter

Name: Gray North 12x21-1/2 to 18" Round Gas Pack Rectangular Duct Adapter
SKU: 12X21.5X18-GP
Price: 96.28 USD
Availability: InStock

SKU: 12X21.5X18-GP

$96.28

Only 2 left in stock

Same-item volume pricing

Quantity	Unit price	Saving
1–4	$96.28	0%
5–9	$91.47	5%
10+	$86.65	10%

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Available to order: 2.

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Product Description

Gray North Rectangular to Round Gas Pack Adapter

Size: 12″ x 21-1/2″ to 18″ Round
MFG# 12X21.5X18-GP

This Gray North rectangular-to-round duct adapter is designed to convert packaged HVAC gas pack units and air handlers from a 12″ x 21-1/2″ rectangular outlet to standard 18” round ductwork.

Made from durable galvanized sheet metal, this formed transition provides a smooth airflow path and a clean professional fit, making it ideal for both new installations and replacement duct conversions.

Ideal Applications:

Gas pack HVAC units
Packaged rooftop HVAC systems
Residential and light commercial installs
Supply or return duct transitions

Key Benefits:

✔ Heavy-duty galvanized steel construction
✔ Precision-formed airflow transition
✔ Improves airflow efficiency
✔ Contractor-grade durability
✔ Fits standard 18″ round duct

Perfect for HVAC contractors needing a properly sized rectangular-to-round conversion fitting.

Product details

Part / SKU	12X21.5X18-GP

Package includes

Gray North 12×21-1/2 to 18" Round Gas Pack Rectangular Duct Adapter

Included components and any stated pack quantity are as described in this listing. Optional accessories shown separately are sold separately unless expressly included above.