Timeline by Configuration
Active install duration:
| Configuration | Install Duration | Project Total |
|---|---|---|
| Ducted whole-home ASHP | 2-3 days | 3-5 weeks |
| Ductless single-zone | 1 day | 2-3 weeks |
| Ductless 2-3 zone | 2-3 days | 3-4 weeks |
| Ductless 4-6 zone whole-home | 3-5 days | 4-6 weeks |
| Ductless 7-8 zone | 5-7 days | 5-7 weeks |
| Geothermal vertical loop | 5-10 days install + 1-3 days drilling | 8-14 weeks |
Frequently Asked Questions
Will my home be without heat during install?
Pro Build sequences work to maintain heat continuously when possible: install new system fully + verify operation before disconnecting old furnace. For replacements where overlap impossible: typical 4-8 hour heat-off window, scheduled mid-day with thermostat pre-heated.
What's the longest part of the timeline?
Mass Save HPC scheduling lead time (4-6 weeks for in-demand contractors during peak season). Manual J + design phase: 1-2 weeks. Permit pull: 5-15 business days. Equipment delivery: 2-4 weeks for major brands. Pro Build's standard scheduling visibility: 4-8 weeks.
References & Sources
- Mass Save heat pump rebate program. https://www.masssave.com/saving/residential-rebates/heat-pumps
