True or False: Heating hot water systems (HHW) are systems that supply hot water to kitchens and bathroom fixtures.

Heating hot water systems (HHW) are designed specifically to provide hot water to various fixtures in a building, including kitchens and bathrooms. Therefore, the statement that HHW systems supply hot water to these types of fixtures is accurate.

However, it is essential to understand that while HHW systems do serve kitchens and bathrooms, they may also incorporate specific designs tailored to different needs or code requirements. The distinction may be in the scope of application; for instance, some heating hot water systems might not cater to every single fixture directly, depending on how the plumbing is set up in a given facility.

Option B suggests that not all kitchens and bathrooms are directly supplied with hot water through HHW systems, which aligns with the idea that there could be exceptions or specific configurations based on a building's plumbing design. Therefore, while many kitchen and bathroom fixtures receive hot water from HHW, the phrasing allows for nuances in plumbing practices, making it a plausible selection.

Ultimately, the answer reflects an understanding of the various configurations and applications of HHW systems in relation to specific fixtures.