Mini-Split for Most ADUs
A single-zone mini-split handles up to 750 sq ft well. Setup is fast and the permit path is simple. SEER2 ratings of 18 to 21 exceed Title 24 minimums.
HVAC Decision Guide for Sacramento ADUs
Hvac For Adu Sacramento
Your ADU needs its own HVAC unit. The right pick depends on size, permit path, and Title 24 rules. Fresh Air has done ADU setups in Sacramento since 2009.
Why Alex's Cleaning Service?
Book nowWhole-home cleaningDeep cleans, move-ins, move-outs, and upkeep.
3-4 person crewA professional team comes to each visit.
490+ reviews (4.9★ on Google)4.9 average rating across public profiles.
Tucson AreaRoutes from Oro Valley to Vail, Sahuarita, and nearby.
Ducted vs Ductless: Choosing HVAC for Your ADU
An ADU under 600 sq ft almost always works best with a mini-split. Larger ADUs may need a small ducted unit. Your permit path, utility tie-in, and Title 24 rules all affect which choice fits best.
Ducted for Larger ADUs
ADUs over 800 sq ft with more than one room may need a small ducted unit. Ducts in attics or crawl spaces must be insulated to at least R-6.
Title 24 and Permits
All ADU HVAC setups in Sacramento need a permit. The 2025 Title 24 code, in force from January 2026, adds fan efficacy and field check steps to the permit process.
What We Handle for ADU Projects
- ADU HVAC design matched to your floor plan and lot.
- Title 24 check before any unit is ordered.
- Permit filing with the city or county.
- Mini-split and ducted unit setup for all ADU sizes.
- Coordination with your ADU or general contractor.
Cost and Utility Connection Notes
A single-zone mini-split for a Sacramento ADU runs $3,000 to $5,000. A multi-zone setup runs $5,000 to $10,000. The city's shelf-ready ADU plans already include mini-split specs. That can speed up your permit through the online portal.
If the ADU has its own meter, the load calc must fit the full electric service on that meter. Fresh Air has set up ADU HVAC units in Sacramento, Elk Grove, Roseville, and Folsom since 2009. CSLB #945361. Call (916) 416-8181 for a free estimate.
Hvac For Adu Sacramento FAQ
Do I need a permit for HVAC in a Sacramento ADU?
Yes. A permit is required for any new HVAC setup. Most Sacramento cities also need an electrical permit for the mini-split circuit.
What unit works best for a small ADU?
A single-zone mini-split is the top choice for ADUs under 750 sq ft. It meets Title 24 with room to spare.
How does Title 24 apply to ADU HVAC?
The 2025 Title 24 rules, in force from January 2026, set fan output minimums and field check steps. Fresh Air handles this as part of the permit process.
Get Your ADU HVAC Estimate
Call (916) 416-8181 or visit our contact page. We serve Sacramento, Elk Grove, Folsom, Roseville, and the greater Sacramento Valley.