Lynn 3123 K-23 Insulating Firebrick 2-1/2″x4-1/2″x9″ IFB Brick

Lynn MFG# 3123 K-23 Insulating Firebrick

2-1/2″ x 4-1/2″ x 9″ Lightweight Refractory Brick

This K-23 insulating firebrick (IFB) is a lightweight, porous refractory brick designed for high-temperature furnace and combustion chamber applications. Manufactured by Lynn Manufacturing, this brick provides excellent insulation performance with low thermal conductivity and minimal heat storage.

Unlike dense firebrick, K-23 bricks heat up quickly, improving system efficiency and reducing fuel consumption in gas, propane (LP), or oil-fired heating systems.

🔥 Ideal Applications:

• Gas & oil furnace combustion chambers

• Boilers

• Kilns and ovens

• Refractory repair projects

• High-temperature insulation builds

✅ Key Benefits:

• Lightweight and easy to handle

• Easily cut with a hand saw

• Reduces heat loss

• Improves combustion efficiency

• Sound absorbing – reduces burner noise

• Excellent energy-saving insulation properties

📏 Specifications:

• Grade: K-23

• Size: 2-1/2″ x 4-1/2″ x 9″

• Manufacturer: Lynn Manufacturing

• Part Number: 3123

• Shipped in cartons of 12 (may be sold individually depending on listing setup)

Perfect for HVAC technicians, boiler repair contractors, kiln builders, and industrial heating professionals.

Important Notice – Propane Parts, Accessories, and Regulators

This product, including but not limited to propane parts, accessories, fittings, hoses, valves, and regulators, must be installed and serviced by a licensed professional in accordance with all applicable local, state, and federal codes, regulations, and standards.

The seller assumes no responsibility for the installation, inspection, application, maintenance, or use of this product.

It is the sole responsibility of the buyer to ensure the product is appropriate for their intended application and that it is installed correctly by a qualified individual.

Improper installation, maintenance, or use of propane products may result in serious injury, death, fire, explosion, or property damage.

The buyer accepts all risks, liabilities, and potential consequences associated with the use of this product.

By purchasing this item, the buyer acknowledges that they have read, understood, and agreed to these terms and confirm that installation and use will be conducted by a properly licensed and qualified professional.