Air Conditioning Installation | Oakland & Macomb County

The short answer

Start with the complete system and the evidence

Air-conditioning replacement should match the home's cooling needs and the air that its ducts can deliver. Sandison reviews equipment compatibility, airflow, controls, drainage, electrical supply, and placement before planning the installation.

What Sandison evaluates

A practical path from symptoms to the right scope

Clear diagnostic process
Licensed multi-trade coordination
Repair and replacement options
Residential and commercial support

Replacement planning

New cooling equipment cannot correct an ignored air-distribution problem

An air-conditioner replacement begins with the building and the air path. Sandison evaluates comfort complaints, equipment history, return-air capacity, supply distribution, filtration pressure drop, duct condition, thermostat and control requirements, condensate routing, electrical supply, outdoor-unit location, and the existing refrigerant-line strategy. The objective is not simply to exchange boxes; it is to match the replacement to the load and remove known restrictions that would compromise comfort, noise, moisture control, or equipment life.

Commissioning evidence

The completed system should be verified under actual operating conditions

A dependable startup includes more than confirming that cold air reaches a register. The installation team checks the applicable airflow and temperature behavior, electrical operation, drainage, control sequence, equipment communication, filter access, outdoor clearances, and visible line and duct connections. Final readings are interpreted in the context of outdoor and indoor conditions. Any limitation that remains in the building or existing distribution system should be explained instead of hidden behind a new-equipment label.

Primary references

Verify the local and credential information.

U.S. Department of Energy — air-conditioning guidance

Common questions

What property owners ask

Should the new air conditioner be the same size as the old one?

The existing nameplate is only a starting point. The home's load, comfort complaints, duct and return capacity, and equipment history need review before selecting replacement capacity.

Can I replace only the outdoor AC unit?

The outdoor unit must be compatible with the indoor equipment, controls, refrigerant-line arrangement, and electrical supply. An installation review determines whether the existing components can remain and identifies any limits affecting the result.

What should be checked when the new AC starts up?

Startup checks cover applicable airflow and temperature behavior, electrical operation, drainage, controls, and equipment clearances. The handoff should also explain filter access and any limitation remaining in the existing ducts or building.

Evidence and review

Why this page can be trusted

Service information based on Sandison’s documented trade scope and the technical references below. Contact the office to discuss the conditions at your property.

Technical lead: James Sandison, B.S. Mechanical Engineering, Oakland University. Michigan Mechanical License 7115733 · Michigan Master Plumber 8112263 · Michigan Plumbing Contractor 800-3618. Service information record: 2026-08-28.