The day a new HVAC system gets installed in your Las Vegas, NV home is a big day. Knowing what to expect hour by hour helps you plan around the work, keep pets safe, and spot if anything is going off-script. This post walks through a typical installation day at Constant Air Balancing & Services, from arrival through final walk-through.
What Happens on HVAC Installation Day in a Las Vegas, NV Home?
A standard same-day residential HVAC installation in Las Vegas, NV (AC + furnace or heat pump, existing ductwork reused) takes 8 to 14 hours. Here’s the sequence:
Hour 0 — Morning Arrival (7:00–8:00 AM)
Crew arrives with the equipment staged and the install plan reviewed. Typical crew: lead installer + 1-2 apprentices, depending on scope. First 30 minutes:
- Introduction, sign the final scope of work
- Walk-through to confirm access paths (attic ladder, mechanical closet, outdoor unit pad)
- Floor protection laid from truck to work areas
- Pets relocated to a closed-off room
- Power verified at the disconnect
Hour 1–2 — Old Equipment Removal (8:00–10:00 AM)
Refrigerant recovery first (EPA compliance — never venting). Then:
- Outdoor condenser disconnected and removed
- Indoor air handler / furnace disconnected
- Refrigerant line set cleaned or replaced
- Old thermostat removed
- Old equipment loaded for proper disposal/recycling
Hour 3–4 — Prep for New Install (10:00 AM–12:00 PM)
- Outdoor pad cleaned or replaced; pad leveled
- New refrigerant line set run if needed
- Electrical disconnect upgraded to match new equipment amperage if needed
- Drain line inspected or replaced
- Ductwork inspected; obvious leaks sealed with mastic
Hour 5–7 — New Equipment Installation (12:00–3:00 PM)
- New outdoor condenser (or heat pump) set and leveled
- New indoor air handler or furnace set in place, secured
- Refrigerant line set brazed or flared + pressure tested
- Electrical connections made (208V/240V)
- Condensate drain connected with trap
- Ductwork reconnected and sealed
- New thermostat wired and mounted
Hour 8 — System Startup (3:00–4:00 PM)
The equipment gets powered on for the first time. Verification:
- Refrigerant charge measured by superheat + subcooling, adjusted if needed
- Blower CFM measured and verified against spec
- Delta-T across the coil measured (should be 18-22°F on cooling)
- Electrical current draw measured and logged
- Combustion analysis on gas furnace (O2, CO, efficiency)
- Thermostat programmed for your preferences
Hour 9–10 — Air Balance (4:00–5:30 PM)
This is the step many installers skip. Constant Air Balancing & Services includes it standard:
- Flow hood reading at every supply register
- Damper adjustment in the ductwork if any room is off design
- Re-read registers to verify
- Record before/after CFM in the final report
Hour 11 — Walk-Through + Documentation (5:30–6:30 PM)
The homeowner walk-through:
- Show you the new thermostat and how to operate it
- Point out the emergency shut-off locations (gas valve, disconnect)
- Explain filter location and replacement schedule
- Hand over the startup report, balance report, and warranty registration
- Collect final payment per contract terms
- Cleanup completed — drop cloths removed, driveway swept
What Can Make the Day Run Longer?
- Existing ductwork in poor condition (takes time to repair)
- Electrical upgrade needed for new equipment
- Concrete pad replacement for outdoor unit
- Refrigerant line set replacement (routing through walls)
- Unexpected surprises behind drywall or in attic access
What Happens If the Install Takes Two Days?
Larger jobs (whole-home replacement with duct work, new construction, complex configurations) may extend to day 2. In that case:
- Day 1 ends with old equipment removed and new outdoor unit set
- Your house may be without AC or heat overnight
- Day 2 completes indoor install, startup, balance, walk-through
We always discuss timing upfront; no surprise overnight outages.
Do I Need to Be Home the Whole Time?
Ideally, yes for the walk-through at the start (first 30 min) and the walk-through at the end (last hour). Middle hours are install work — you can come and go. Many homeowners work from another room while the crew works.
What About Access to Other Parts of the House?
The crew works primarily at the air handler location (attic, closet, or basement) and the outdoor unit. Other rooms are accessible throughout — though expect some noise and occasional pauses when we need to cycle breakers or shut off power briefly.
What About Pets?
Secure pets in a closed-off room, especially cats who might dart through the open door when the crew moves in and out. Let the lead installer know where pets are.
When Does the Warranty Start?
The day of startup (not the day of purchase). Manufacturer parts warranty (typically 10 years) and installer labor warranty (typically 1 year) both begin when the system runs for the first time. Registration with the manufacturer (Goodman, Trane, Carrier, Lennox) should happen within 60 days — your installer handles this but verify.
What Should I Do in the First Week After Install?
- Monitor for unusual noises, odors, or temperatures
- Check the thermostat is holding setpoint
- Confirm the filter is clean (some installers leave the old one in; verify)
- Walk the rooms on day 3-4 to confirm even cooling
- Call the installer immediately for any concern — don’t wait
Schedule Your HVAC Installation in Las Vegas, NV
Call Constant Air Balancing & Services at (702) 840-5163 or request an installation quote. Every install finishes with a startup report, a balance report, and a homeowner walk-through. Serving Las Vegas, Henderson, Paradise, Spring Valley, and Enterprise, NV.