Which type of boiler is typically not allowed in residential settings?

In residential settings, the use of industrial-grade boilers is typically not permitted due to several factors related to their design, size, and intended purpose. Industrial-grade boilers are built to handle large-scale heating applications in commercial or industrial environments, often featuring higher pressure and greater capacity than what is necessary or safe for residential use.

These boilers usually comply with stringent industrial regulations and are designed for efficiency and durability under demanding conditions, making them unsuitable for smaller, less demanding residential applications. Residential settings require boiler systems that are specifically designed to meet safety standards for home use, which include considerations of space, fuel type, emission levels, and system pressure.

In contrast, fire tube, water tube, and cast iron sectional boilers are commonly used in residential applications. They are sized appropriately for home heating needs and constructed with safety features tailored for domestic environments, making them much more suitable for residential installations.