What defines a Hot Water Heating and Hot Water Supply Boiler?

A Hot Water Heating and Hot Water Supply Boiler is defined by its operating parameters, specifically in terms of pressure and temperature. The correct answer indicates that these boilers should operate at pressures not exceeding 160 psi or temperatures that do not go beyond 250°F. This definition aligns with industry standards, which highlight the importance of these limits for safety and efficiency.

Maintaining pressure under 160 psi ensures that the boiler operates within a safe range, reducing the risk of structural failures and maintaining the integrity of the entire heating system. Similarly, the temperature limit of 250°F prevents overheating, which could lead to dangerous conditions, including the potential for equipment damage or failure.

The other choices do not accurately represent the defining criteria for these types of boilers. For instance, a limit of 80 psi is too low for many applications, and while 200°F is a reasonable temperature threshold, it does not account for the standard definitions found in most code requirements. Therefore, the parameters listed in the correct choice are crucial for ensuring both the safe operation and regulatory compliance of hot water heating systems.