Top HVAC Questions Every First-Time Home Buyer Should Ask
Last Updated on June 20, 2025 by Chad Peterson
If you’re buying your first home, don’t overlook the HVAC system. Here are the key questions to ask about heating, cooling, and air quality before you close.
In my first home, I had no clue about HVAC. And I had no idea at the time that my profession would be in that industry. The term “HVAC” came into common use around the 1960s, as the industry began to integrate heating, ventilation, and air conditioning into single systems.
Before that, systems were usually referred to separately—“heating and ventilating”—especially before residential air conditioning became widespread. So in the 70’s when I bought this home (shack) I had never heard the acronym HVAC.
First-time home buyers are often focused on flooring, kitchens, and paint colors—but the HVAC system quietly holds the power to drain your wallet or keep your new home comfortable for years. Before you sign on the dotted line, here are the HVAC questions every first-time buyer should ask the seller, inspector, or themselves—because heating and cooling is one system you don’t want to ignore.
If you’d like an in-depth review of questions to ask before purchasing a new HVAC system, I wrote an entire article covering many more thoughts and ideas about what to consider. You’ll be able to read it here.
How Old Is the System?
- Most systems last 10–20 years, depending on type and maintenance
- Ask the seller or agent for installation dates
- Look for serial number tags on the furnace, AC, or heat pump
- Systems over 15 years old may need replacement soon—budget accordingly (More About System Life Span)
What Type of System Is Installed?
- Is it a gas furnace and AC, a heat pump, a boiler, or a mini split?
- Know what you’re buying—some setups cost more to maintain or repair
- Ask if there’s a zoning system, humidifier, or ERV
- Dual fuel systems (gas + heat pump) may require special thermostat settings
Has It Been Maintained Regularly?
Ask for service records—yearly tune-ups are ideal
Check for:
- Dirty filters
- Rust around furnace
- Water stains near the unit
- Dust buildup around registers
Lack of maintenance shortens system life and reduces efficiency
Are the Ducts in Good Shape?
- Leaky, unsealed, or dirty ducts waste energy
- Ask: Have the ducts been cleaned or sealed?
- Are there rooms that stay hotter or colder than others?
- Uneven airflow often means air balancing or duct upgrades are needed
What Are the Monthly Heating and Cooling Costs?
- Ask for 12 months of utility bills if possible
- High costs could mean: oversized or undersized or even failing equipment
- Factor those costs into your buying decision
Is There a Programmable or Smart Thermostat Installed?
- Ask what model is installed and whether it supports: scheduling, and Wi-Fi
- Older thermostats can cost you comfort and energy
What Should I Do Right After Moving In?
- Replace all filters
- Schedule a full system inspection by a licensed HVAC tech
- Learn how your thermostat works
- Check safety devices: CO detector, condensate overflow shutoff, breakers, and shut-off switch locations.
- Suggest a seismic gas shut-off valve (you can read this post for a complete run down)
Final Thought: Don’t Let HVAC Be an Expensive Mystery
An HVAC system isn’t something you want to “figure out later.” These questions don’t just help you spot problems—they help you negotiate, plan ahead, and avoid major surprises after move-in. Smart first-time buyers treat HVAC as part of the investment—not just something that makes air cold.
