A frigid family wanted to buy a heater, so where did they have it installed?
Options:
- automobile
- city hall
- house
- public building
- office Let's think step by step:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
A house is a building where a family generally lives. People generally install heaters where they live. So, the answer is house.