What we see in Mountain View homes
Climate. Climate zone 4 with marine influence, milder summers than Sunnyvale (design cooling 88°F). Heating design 36°F. Significant fog/marine layer in summer mornings.
Housing stock. Old Mountain View has 1940s–60s starter homes with tight ductwork and often no AC at all originally. Newer dense developments (Mariposa, Cuesta Park infill) are post-2010 code-built with full HVAC. ADU and granny-flat conversions are common throughout.
Typical systems. AC retrofits to homes that never had cooling, heat pump replacements on 1990s+ stock, ductless mini-splits for ADUs and home offices, packaged units for newer townhomes.
“We never had AC” retrofits
A significant fraction of original Mountain View housing, particularly Old Mountain View around the downtown core, was built with heat only (gas furnace, no central AC). Mild marine summers used to make AC optional; warming summers and remote-work daytime occupancy have changed the math. We retrofit AC into these homes in two ways: (1) condenser-and-coil add to the existing furnace if ductwork supports it, or (2) ductless mini-split for homes where the original ducts are too compromised to handle the added cooling airflow. Mini-split is the cleaner answer roughly 60% of the time.
ADU/garage conversion frequency
Mountain View’s permitting environment has been ADU-friendly since the 2020 California ADU streamlining laws, a meaningful share of our local work is HVAC for new ADUs or converted garages. The default install is a single 12,000 or 18,000 BTU/h mini-split: compact outdoor unit, one indoor head, full independent climate control, Title 24 compliant out of the box. Our free mini-split calculator sizes per-room.
Services in Mountain View
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Neighboring cities we also serve
Palo Alto · Los Altos · Sunnyvale .
Selected HVAC projects
Completed jobs with real photos and the detail that mattered. See all case studies.
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C&H OLMO Mini-Split Installation at The Athenian School in Danville
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Goodman Heat Pump Installation in Union City
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Wall Furnace Installation in Newark
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Goodman Dual Heat Pump Installation in Morgan Hill
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Goodman 18,000 BTU Heat Pump Installation in San Ramon
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Carrier 19 SEER Heat Pump Installation in San Ramon
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HVAC Smart Thermostat Replacement in Mountain View
Schedule HVAC service in Mountain View
Repairs start with a $99 diagnostic, credited toward the fix. Replacing a system? The on-site assessment visit is free. Same-day written findings either way.
Mountain View, CA · 7am–7pm · 7 days · no overtime charges