IRBIS provides HVAC services that Portola Valley estate owners trust, with same-day availability and Carrier-certified technicians ready for any job. On large properties with wooded lots, accurate load calculation, multi-zone system design, and PCE rebate paperwork are part of every estimate we run.
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IRBIS provides all HVAC services that Portola Valley properties need, including cooling, heating, heat pumps, and water heaters. IRBIS offers same‑day service. Is Carrier‑certified. Portola Valley estates, on wooded lots, need load calculations that consider tree canopy shading. Tree canopy shading can greatly change how systems should be sized compared to open properties.
Portola Valley summers stay mild. Yet heat waves push past 81°F and large estate footprints still need AC. Wooded lots with oaks create shade that reduces cooling load. That means oversizing is a risk without a proper Manual J calculation.
January lows drop into the 35‑42F range. Wet winters last from November through March. A furnace that sits unused through summer must be inspected before the rainy season begins.
In Portola Valley, the annual temperature range of 35‑81°F sits squarely in the zone where heat pumps run efficiently in both directions. Heat pumps can replace a gas furnace and a separate AC unit. Heat pump installation is a choice for properties that qualify for Peninsula Clean Energy rebates.
Repair, maintenance, and installation for traditional and heat pump water heater models, for residential properties.
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Portola Valley is known for a Mediterranean climate. In Portola Valley tree canopy, changes in elevation and access, to hills all influence how heating, ventilation and air conditioning systems should be sized and installed on each property.
Portola Valley logs 262 sunny days a year, but that number does not translate directly to cooling load on wooded lots. Native oaks and bay laurel shade properties significantly, reducing the heat gain that drives AC sizing in open suburbs. A system sized for full sun on a tree-covered lot will short-cycle and wear faster. Oversizing is the most common sizing mistake.
Temperatures rarely reach extremes in either direction, but 35°F January lows and wet winters from November through March make reliable heating non-negotiable. Heat pumps cover this entire range efficiently, handling mild heating and occasional summer cooling without the inefficiency penalty that comes in harsher climates.
Peninsula Clean Energy serves Portola Valley, and qualifying upgrades can stack PCE rebates with state programs. IRBIS confirms current amounts and handles all paperwork at the time of your estimate.
Available Rebates
California Energy-Smart Homes $4250
Tech Clean up to $1000
Silicon Valley Clean Energy up to $3000
Westlight Energy up $2000
As the local HVAC company Portola Valley property owners call for estate-scale projects, IRBIS services every residential property type in the area, from large single-family estates on wooded lots to older ranch-style properties and new all-electric construction.
Older ranch-style properties along Alpine Road and in the Ladera area were often built without central ductwork. Ductless mini-split systems deliver full heating and cooling with no major renovation and most installations complete in a single day.
New construction on large wooded lots calls for load calculations that account for tree canopy from the start. IRBIS installs heat pump, water heater, and EV charger as one coordinated package, built for California's gas equipment deadline.
Most residential properties are large single-family estates on wooded lots, many with guest houses or secondary structures that need their own climate zone. IRBIS plans each system for the actual site conditions, not a standard suburban template.
Carrier Presidential Award Winner
Not every HVAC company earns this — IRBIS does. Carrier is the benchmark for premium HVAC, and this award confirms our installation and service standards meet their highest criteria.
10-Year Parts & Labor Warranty
Competitors offer 12 months on repairs and 3 years on installations. IRBIS gives you 10 years, in writing.
Same-Day Service, 7 Days a Week
Call before noon, and we will arrive today.
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Licensed & Insured — CSLB #1048009
Every technician is a licensed HVAC professional, not a subcontractor.
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Carrier, Trane, Lennox, Rheem, Daikin, Mitsubishi, Goodman. As the heating and cooling contractor Portola Valley property owners call for any system, IRBIS services all major brands regardless of what is currently installed. One call covers any unit on the property.
IRBIS serves all of Portola Valley, ZIP code 94028, from the Ladera neighborhood and Alpine Road corridor to Los Trancos Woods, Portola Valley Ranch, the Windy Hill area, and Willowbrook. Our technicians are familiar with the property access conditions, lot sizes, and wooded terrain that make installations different from standard suburban jobs.
Wooded Portola Valley properties accumulate debris in outdoor units faster than open suburban lots, and ductless mini-split systems need their own maintenance schedule. The IRBIS Home Care Plan keeps every system on the property covered for $24.95 a month.
Join for only $24.95 / month:
Seasonal Maintenance
Full HVAC, Plumbing, Electrical Maintenance
Free Inspections
Regular fee $115
VIP Priority Scheduling
Get an appointment within 48h or faster
Special discounts
20% off for repairs, 5% off for replacements
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Step 1
Our trained and licensed specialists will diagnose your furnace, meticulously evaluating all components. This thorough assessment ensures the root cause of any issue is identified, preventing recurring problems and ensuring the system operates at peak efficiency.
Step 2
Based on the assessment, we will recommend tailored solutions to address your furnace’s issues. This approach empowers homeowners to make informed decisions about repairs, considering factors such as budget, urgency, and long-term system performance.
Step 3
Once you select a repair option, IRBIS technicians will carry out the necessary repairs using high-quality parts and tools. Their expertise and well-equipped vans allow them to handle most repairs promptly, ensuring your HVAC system is back to optimal efficiency with minimal downtime.
Step 4
We provide ongoing support and expert advice to help ensure the continued efficiency of your HVAC system.
November 5, 2026
Winter in the Bay Area brings wind, heavy rain, and falling branches, and with them come power outages. Sometimes the lights flicker for a few seconds.
November 2, 2026
Bay Area winters are mild, but wet. Weeks of rain, cool nights, and homes that stay closed up for months create ideal conditions for indoor moisture problems. You might notice water droplets on your windows in the morning, a damp feeling in the closet, or a musty smell when the heat kicks on.
October 28, 2026
In the Bay Area, winter doesn’t arrive with snow. It arrives with rain. One week your yard is bone dry, and the next an atmospheric river drops several inches of water in a couple of days. For most homes, that sudden shift is the real test of the season.
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Questions & Answers
Same-day service is available 7 days a week. Call before noon, and we can typically have a technician at the property that afternoon.
Every IRBIS installation comes with a 10-year parts and labor warranty, well beyond the 1-3 years most local contractors offer.
Yes, for most properties. The 35-81°F annual range is well within the zone where heat pumps operate efficiently in both directions, and PCE rebates make the transition from gas more accessible.
Yes. Ductless mini-split systems are a direct solution for older ranch and ranch-style properties built without central ducts. Most installations are complete in a single day with no major renovation.
Peninsula Clean Energy (PCE) rebates are available for qualifying heat pump installations and high-efficiency AC upgrades. These can be stacked with state programs. IRBIS confirms current amounts at your estimate since programs update throughout the year.
It does, meaningfully. Native oaks and bay laurel shade properties and reduce cooling load compared to open lots. A proper Manual J load calculation using your actual site conditions prevents the oversizing that is common on Portola Valley properties.
Yes. Guest houses and secondary structures get their own independent system, sized and installed separately from the main property. IRBIS plans the full scope during the estimate visit.
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