Air Conditioning Installation and Replacement in Marin and Sonoma County
The right size depends on your home, not its square footage alone. Aaero runs a Manual J load calculation that accounts for insulation, windows, sun, and layout. An oversized unit short-cycles and wears out early; an undersized one never keeps up on a hot afternoon. Correct sizing is what makes a system last.
- What size air conditioner do I need?
- When it makes sense to replace
- Systems we install
Expert AC installation across Marin County.
Same-Day Service • Same-Day Response • Licensed #278370 (C20 · C43) • BBB Accredited
When repairs start costing more than the unit is worth, a new system is the smarter spend. Aaero has installed and replaced air conditioners across Marin since 1960, and the part we will not rush is sizing.
What size air conditioner do I need?
The right size depends on your home, not its square footage alone. Aaero runs a Manual J load calculation that accounts for insulation, windows, sun, and layout. An oversized unit short-cycles and wears out early; an undersized one never keeps up on a hot afternoon. Correct sizing is what makes a system last.
- The unit is past 15 years old and repairs are adding up.
- Energy bills keep climbing even though usage has not.
- It struggles to keep the house cool during a heat wave.
- It still uses phased-out R-22 refrigerant, which is costly to service.
Central air for homes with usable ductwork, ductless mini-splits for homes and additions without it, and high-velocity systems for older homes where standard ducts will not fit. We also install smart thermostats and replace air handlers as part of an upgrade. For heat pumps, see our heat pump page.
What size air conditioner do I need?
The right size depends on your home, not its square footage alone.
The unit is past 15 years old and repairs are adding up.
Central air for homes with usable ductwork, ductless mini-splits for homes and additions without it, and high-velocity systems for older homes where standard ducts will not fit.
Many installs qualify for $1,000+ in utility rebates we file for you.
Energy bills keep climbing even though usage has not.
It struggles to keep the house cool during a heat wave.
Systems we install
Central air for homes with usable ductwork, ductless mini-splits for homes and additions without it, and high-velocity systems for older homes where standard ducts will not fit. We also install smart thermostats and replace air handlers as part of an upgrade. For heat pumps, see our heat pump page.
AC Repair
Won’t turn on. Blowing warm. Tripping the breaker. We diagnose what’s actually wrong, quote upfront pricing, and have most homes cooling again the same day.
Installation & Replacement
When repair stops making sense, we sit down with you on a new system, sized correctly for your square footage, ductwork, and energy goals. No oversold equipment. Real rebate help.
Maintenance Plans
Spring and fall tune-ups catch problems before they break the system. Members get priority scheduling, discounted repairs, and a written record that keeps manufacturer warranties valid.
Mini-Split Installation
Converted garage that’s always 10° off? Addition with no ducts? Mini-splits heat and cool one space at a time, quiet, efficient, and a fraction of the cost of central system retrofits.
