
Volts Streamlining the difficult work of whole-home retrofits
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May 6, 2026 Grant Gunnison, founder and CEO of Zero Homes, is building a digital operating system to simplify whole-home retrofits. He discusses homeowners’ retrofit headaches and why quotes and quality vary. He explains contractor business frictions, how remote 3D video scans replace many site visits, and how Zero Homes standardizes design and delivery to improve outcomes.
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Heat Pumps Lose Out Because They Cost More To Quote
- Heat pump sales require more upfront design and time than like‑for‑like furnace replacements.
- That extra soft cost lowers conversion and disincentivizes contractors from selling heat pumps despite their advantages.
Widespread Installation Errors Harm Heat Pump Outcomes
- Improper sizing and installation cause 70–90% of US residential heat pump and central air systems to lose 20%+ efficiency.
- Poor design and rushed processes explain many homeowner complaints and uneven public sentiment about heat pumps.
Centralize Design Work And Deliver Contractors A Ready Scope
- Let trained experts use homeowner-supplied scans to do design and quoting centrally rather than push complex design work onto local salespeople.
- Deliver contractors a fully specified scope so they can focus only on installation.

