Per-Unit vs Shared Systems
Most 2- to 4-unit buildings in Sacramento put one unit per tenant. That keeps bills split and repairs simple. Some older buildings share a system. Shared systems need clear rules on billing before problems come up.
Sacramento Multi-Family HVAC Guide
A duplex or fourplex in Sacramento means two to four HVAC units to manage. Fresh Air handles small multi-unit jobs.

A duplex or fourplex is not a single home but not a big commercial job either. Each unit often needs its own heat and AC unit. You must think about tenant impact when one goes down. Fresh Air has worked on 2- to 4-unit jobs in Sacramento since 2009. CSLB 945361.
Most 2- to 4-unit buildings in Sacramento put one unit per tenant. That keeps bills split and repairs simple. Some older buildings share a system. Shared systems need clear rules on billing before problems come up.
Rental units run hard. Tenants do not always turn units off when they leave. Size slightly above the room minimum. A well-sized unit runs fewer long cycles and lasts longer.
Fresh Air installs most units in about 48 hours. We schedule around tenant needs when we can. Milestone billing means you pay in steps, not all at once, which helps cash flow on a rental.
For a standard fourplex, we treat each unit as its own install. We do all four back to back to cut the days on site. Each unit gets its own city permit. We do not skip permits on rental jobs since that can cause issues at sale.
AC setups in Sacramento run $4,500 to $12,000 per unit. Heat pump swaps run $8,000 to $15,000 per unit. We use milestone billing. Call for a custom multi-unit quote. Doing several units at once can lower the cost per unit.
Yes. We do multi-unit jobs in one visit to cut time on site. Call us for a multi-unit price.
Yes. Each unit in Sacramento needs its own permit. Fresh Air pulls all permits as part of the job.
Size is based on room size, ceiling height, and insulation. For rental use we often size slightly above the room minimum to handle hard use.
We handle 2- to 4-unit jobs well. For 5 or more units we do a custom commercial quote. Call (916) 416-8181 to talk about your building.
Call Fresh Air at (916) 416-8181 or use our contact page. We handle 2- to 4-unit properties with permits and milestone billing. Serving Sacramento since 2009 with 900+ units installed.