Mg Duravent FSCMKI04B 4in Insulated Heater Vent Kit

Product Description

The MG DURAVENT FSCMKI04B is a 4-inch ceiling mounted insulated heater vent kit built from 316L stainless steel as part of the FasNSeal single-wall vent system. It is designed for direct-vent and Category III or IV appliance exhaust applications where a ceiling penetration and insulated transition are required. The kit includes components engineered with smooth, clean welds positioned 90 degrees from the mechanical locking bands, which simplifies alignment and speeds up field installation. All surfaces that contact exhaust gases and condensates are silicone-free, eliminating a common failure point caused by adhesion variability and epoxy bond degradation over time. Licensed HVAC technicians and heating contractors install this kit as part of a complete FasNSeal vent assembly.

This vent kit is suited for residential and light commercial heating installations where a 4-inch FasNSeal single-wall vent system terminates through or transitions at a ceiling. Typical applications include high-efficiency gas furnaces, boilers, and direct-fired heaters routed vertically through conditioned or unconditioned ceiling assemblies. The insulated design helps reduce clearance-to-combustible requirements at the ceiling penetration point, making it practical in tight framing conditions. Installers working on new construction or retrofit projects will find the ceiling-mount configuration compatible with standard FasNSeal 4-inch system components.

Key Features

• 316L stainless steel construction on all exhaust-contact surfaces for corrosion and condensate resistance
• Silicone-free design on all exhaust and condensate contact surfaces reduces long-term failure risk
• Patented built-in mechanical locking band with triple-lipped directional gaskets for a secure, leak-resistant connection
• Welds located 90 degrees from mechanical locking bands for clean alignment and easier installation
• Insulated construction helps reduce clearance-to-combustibles at the ceiling penetration
• Ceiling-mount configuration supports vertical vent routing through floor and ceiling assemblies

Compatibility

Designed for use with the FasNSeal 4-inch single-wall vent system. Compatible components must match the 4-inch FasNSeal system diameter and locking-band connection standard. Consult the FasNSeal installation guide to confirm all system components are matched by diameter and fuel type rating.

Installation Notes

Installation should be performed by a licensed HVAC technician or heating contractor in accordance with local mechanical codes and the appliance manufacturer's venting requirements. Shut down and allow the heating appliance to cool completely before working on any vent components. Verify that all clearance-to-combustible requirements for the ceiling assembly are met per the IFGC and local amendments. Do not mix FasNSeal components with other vent system brands or diameters, as the mechanical locking band requires matched system parts for a proper seal.

Technical Specifications

• Vent Diameter: 4 inches
• Material: 316L Stainless Steel
• Mount Type: Ceiling Mounted
• Insulation: Insulated
• Silicone-Free: Yes

Standard Information

• Brand: MG DURAVENT
• Manufacturer Part Number: FSCMKI04B