Central AC

Quiet, efficient whole-home cooling.

If your home already has ductwork, a high-SEER2 central AC is the fastest path to even cooling in every room.

High-efficiency outdoor AC condenser installed at a New England home

We start every central AC job with a Manual J load calculation. Sizing the system correctly is what keeps it quiet, pulls humidity out of the air, and stops it from short-cycling in the shoulder seasons.

  • 16 to 20+ SEER2 systems
  • Two-stage and variable-speed options
  • Existing-duct upgrades and rework
  • Quiet outdoor condensers
  • Smart thermostat included
  • Up to 7-year warranty

Even, quiet cooling

No more hot bedrooms upstairs. We design around real airflow.

Better dehumidification

A properly sized system pulls humidity out, which you feel right away.

Reliable equipment

We install brands we trust and can get parts for.

Heat-pump ready

Ask about hybrid systems that add efficient heating on top of the AC.

Request your free estimate

Free · No pressure

Get a free estimate

Tell us a little about your home and we'll call you back shortly.

By submitting, you agree to let Black Diamond Energy contact you about your request.

Ready for a home that heats and cools like it should?

Free in-home estimates across Massachusetts, with same-week installs on most systems.