<p>This depends on several factors, condensation on duct or pipe, heat loss or temperature control. Energy conservation or even sound proofing.</p>

<p>Building codes vary from location to location. If job specifications are available there should be a clear definition of the product required.</p>

<p>Yes, whether you’re working on a new project or an upfit, we’re here to provide high quality, reliable service.</p>

<p>In most cases it would need to be removed and replaced with new.</p>