Welcome to Homeownership!
Congratulations on your first home! Your HVAC system is one of the most important – and expensive – systems in your house. Understanding it will save you money and keep you comfortable for years to come.
Know Your System
Common System Types
Central Air Conditioning
- Outdoor unit (condenser) + indoor coil
- Uses existing ductwork
- Cools entire home
Furnace
- Gas, electric, or oil-powered
- Usually in garage, basement, or closet
- Heats via ductwork
Heat Pump
- Heats AND cools
- One outdoor unit, one indoor
- Efficient for mild climates like Bay Area
Ductless Mini-Split
- No ductwork needed
- Individual units per room
- Common in older Bay Area homes
Locate Your Equipment
Find and note the location of:
- Indoor unit (furnace, air handler, or indoor mini-split units)
- Outdoor unit (condenser or heat pump)
- Thermostat(s)
- Air filter location
- Electrical disconnect (usually near outdoor unit)
- Gas shutoff (if gas heating)
Find Your Filter
Your air filter location varies:
- In return air grille (wall or ceiling)
- In furnace or air handler
- Possibly multiple locations
Note the filter size (printed on filter frame) for replacements.
Immediate Tasks
1. Replace the Air Filter
You don't know when it was last changed. Start fresh.
2. Schedule an Inspection
Have a professional inspect before problems arise:
- Verify system condition
- Identify any issues
- Learn about your specific system
- Establish baseline for future comparison
3. Find System Documentation
Look for:
- Equipment manuals
- Warranty information
- Service records
- Permits for past work
4. Review Home Inspection Report
Your home inspection likely noted HVAC details:
- Equipment age and condition
- Any concerns raised
- Recommended repairs or maintenance
Understanding Your Thermostat
Basic Operation
- Heat: System heats to reach set temperature
- Cool: System cools to reach set temperature
- Auto: System heats or cools as needed
- Fan On: Fan runs continuously
- Fan Auto: Fan runs only with heating/cooling
Programming (if applicable)
Set schedules to save energy:
- Lower heating/raise cooling when away
- Comfortable temps when home
- Sleeping temperatures
Upgrade Consideration
Smart thermostats offer:
- Learning capabilities
- Remote control
- Energy savings
- Integration with other devices
Essential Maintenance
Monthly
- Check air filter – replace if dirty
- Glance at outdoor unit – clear obvious debris
Seasonally
- Spring: Clear outdoor unit, test AC before summer
- Fall: Test heat before winter
Annually
- Professional maintenance – once or twice yearly
- Smoke/CO detector batteries – replace with time change
When to Call a Professional
Immediate Attention Needed
- Gas smell (leave house, call PG&E)
- No heat in cold weather
- No cooling in extreme heat
- Water leaking from equipment
- Burning smell
- Carbon monoxide alarm
Schedule Service For
- System running but not heating/cooling well
- Unusual noises
- Short cycling (turning on/off frequently)
- Higher than expected bills
- Any concern about operation
Annual Professional Service
Professional maintenance includes:
- Thorough cleaning
- Safety inspection
- Efficiency optimization
- Early problem detection
Budgeting for HVAC
Ongoing Costs
- Filters: $10-50 every 1-3 months
- Electricity/gas: Varies with usage
- Annual maintenance: $150-300
- Repairs: Budget $200-500/year average
Future Costs
Expect equipment replacement:
- AC/Heat pump: 15-20 years lifespan
- Furnace: 15-25 years lifespan
- Replacement cost: $8,000-15,000+ depending on system
Consider setting aside $50-100/month for future replacement.
Understanding Your Home's Quirks
Every home has HVAC personality:
- Rooms that heat/cool differently
- System sounds that are normal
- Optimal thermostat settings
- Seasonal patterns
Document what you learn for reference.
Red Flags from Sellers/Inspections
Watch for language like:
- "Works well" (but how old?)
- "Recently serviced" (minor maintenance or major repair?)
- "Some rooms warmer/cooler" (normal or problem?)
- "Older unit but reliable" (how old?)
Ask specific questions and get documentation.
Bay Area Specific Tips
Our Climate
- Mild winters = less heating needed
- Cool summers near coast, hot inland
- Many older homes lack AC
- Wildfire smoke means air filtration matters
Older Homes
Many Bay Area homes have:
- Original floor furnaces (often converted)
- No ductwork
- Window AC units
- Converted spaces with separate systems
Utility Programs
PG&E offers:
- Energy audits
- Rebates for efficient equipment
- Time-of-use rates (shift usage to save)
- Budget billing (predictable monthly cost)
Building a Relationship with a Contractor
Find a contractor you trust:
- For annual maintenance
- For future repairs
- For eventual replacement
- For questions and advice
A good contractor is a homeownership asset.
Summary Checklist
First month as homeowner:
- [ ] Locate all HVAC equipment
- [ ] Replace air filter
- [ ] Find filter size and stock up
- [ ] Locate electrical and gas shutoffs
- [ ] Test heating and cooling
- [ ] Review home inspection notes
- [ ] Schedule professional inspection
- [ ] Save contractor number in phone
Welcome to homeownership – and comfortable living!