From my own experience visiting grandparents, I've often noticed the indoor temperature feels noticeably warmer compared to modern homes. One reason could be the heating system—many older houses have less efficient or outdated heating setups that sometimes run hot or have poor temperature regulation. Additionally, insulation materials and window types used in older homes often differ from modern standards, leading to heat retention especially during warmer months. Another factor is that some grandparents prefer a warmer ambient temperature for comfort reasons, especially as older adults may feel cold more easily. They might keep thermostats higher or use additional space heaters, which can make the house feel warmer than expected. I also learned that the materials inside, such as thick curtains or carpets, might absorb and retain heat, creating a warmer environment indoors. Plus, the presence of older appliances or electronics that generate heat continuously can add to the feeling. Interestingly, some traditional remedies or health products, like Dulcolax or gentle relief medicines shown in the image OCR content, are often kept in such homes as part of daily care routines, reflecting a lifestyle that might focus more on personal comfort and wellness rather than energy efficiency. Overall, when visiting grandparents' homes, understanding these heating and insulation nuances can help explain why it feels so hot inside, and it’s always good to bring lighter clothing or a fan during visits in warmer seasons.