Buying a new HVAC system involves a detailed process to ensure the right fit for your home. Homeowners should start by assessing their heating and cooling needs, which now require consideration of factors like energy efficiency, climate, and home layout. There are three primary types of HVAC systems: central air conditioning, heat pumps, and ductless mini-splits. Proper sizing is essential; HVAC experts recommend a thorough analysis to determine the most suitable unit. Budgeting is also critical, as costs can range from $8,000 to $35,000, factoring in installation and potential upgrades. Vetting contractors is important to ensure quality installation, and homeowners should seek multiple quotes while checking for proper licensing and reviews. Evaluating energy efficiency ratings can help in selecting a unit that balances upfront costs with long-term savings. Finally, preparation for installation day is key, with most installations completed within one to two days. Following these steps can help homeowners make informed decisions and avoid common pitfalls in HVAC shopping.