A heat pump job looks simple on the quote: survey, install, done. In practice it is a chain of small steps, and one missing piece stalls the whole thing. The panel is full, the outdoor unit is still at the distributor, or the electrician is booked elsewhere.
In winter that delay has a cost the customer feels. If the old furnace is coming out, the home has no heat until the new system runs. The answer is to plan every install as a short project, not a single calendar slot.
Why install volume keeps climbing
AHRI's September 2026 shipment release shows US manufacturers shipped 3,211,075 air-source heat pumps from January to September, up 6.4 percent on the same months of 2025. Gas furnace shipments over the same period were 2,386,200, down 4.4 percent.
More units shipped means more installs landing on the same crews. If you already plan your service calls for the cold months, our post on heating season crew scheduling covers that side. This post is about the install job itself.
Break each install into stages
Every heat pump install moves through the same stages, whether it is a single ductless head or a full ducted replacement:
- Site survey: load calculation, ductwork check, panel and breaker space, outdoor unit location
- Equipment selection and written scope
- Equipment ordered and confirmed on site or at the branch
- Electrical check or panel upgrade, if needed
- Install day: old unit out, new units set, line set, wiring, drains
- Commissioning: charge, airflow, controls, homeowner walkthrough
- Follow-up visit or call after the first cold snap
Make each stage a task with a date and a named owner. The survey belongs to your comfort advisor, the panel work to your electrician, install day to a crew lead. Mark the signed scope and the commissioning date as milestones, so you can see at a glance which homes are close to running and which have not started.
Link the stages so nothing jumps the queue
The install crew should never be booked before the equipment is confirmed and the electrical check is done. Commissioning follows install, and the follow-up follows commissioning. Set those links as dependencies.
When the outdoor unit slips three days, the install and everything after it move with it. You see the new date before the crew drives out.
Protect the no-heat window
A replacement in January is a different job from a new install in a home that still has working heat. For replacements, keep the old system running until every dependency is met. Do not pull the furnace on day one and wait on parts on day two.
Give these jobs a higher priority than add-on or comfort installs, and put them first on the board. If the forecast turns, the homes without backup heat go first. Our guide to planning weather delays into the schedule explains how much buffer to leave between outdoor work days.
Plan three weeks ahead
Each week, pull the next three weeks into a 3-week lookahead. For week one, confirm equipment, electrician and crew for every install. For weeks two and three, chase the open items: surveys not done, scopes not signed, units not ordered.
Count how many installs your crews actually finished each week over the last month. If the lookahead holds more than that, move the lower priority jobs out now, and tell those customers early.
Give crews the plan on their phones
When the survey tech finds a full panel and notes it in the task from site, the office can reschedule the electrician the same day. Our post on AC installation job tracking covers the same flow for cooling jobs.
Putting it on one plan
Set up each install with its seven stages, dependencies between them, and milestones at the signed scope and commissioning. Assign every task to a named person, set priority by whether the home has heat, and review the three-week window every week.
Zace gives you Gantt charts, milestones, task dependencies, task assignment and priorities, on web, Android and iOS. When a delivery slips, you move it once and the whole install updates for everyone.
Frequently asked questions
How long does a heat pump installation take?
The on-site work for a straightforward replacement is often one to two days, and a single ductless head can fit in one day. The full job, from survey and sizing to equipment arrival, electrical work and commissioning, usually runs over a few weeks.
What should be done before the install crew is booked?
Finish the site survey and load calculation, sign the scope, confirm the equipment is in hand, and check the electrical panel. Book the crew only once those steps are done.
How do you avoid leaving a home without heat during a replacement?
Keep the old system running until the new equipment, electrician and crew are all confirmed, then remove and replace it in the same visit. Give these jobs priority over installs in homes that still have backup heat.
Plan the install before the crew arrives, and the customer never notices how many pieces had to line up.
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