The answer to 'should I get water heater or' is that the choice between a water heater and another HVAC system depends on your specific needs and home setup. Water heaters are a common and reliable way to provide hot water for your home, while other HVAC systems like furnaces or heat pumps are used for whole-home heating and cooling.
When deciding between a water heater and another HVAC system, consider factors like the age and condition of your current equipment, your home's size and layout, your energy efficiency goals, and your budget. Water heaters generally have lower upfront costs but higher operating costs, while HVAC systems can be more expensive to install but may save you money in the long run through improved energy efficiency.