Field-tested guidance for facility managers, engineers, contractors and procurement teams — how commercial mechanical systems are specified, maintained and kept in service.
FeaturedA practical look at the inspections, documentation and seasonal tasks that keep rooftop units, chillers and refrigeration systems inside their design envelope — and what usually gets skipped.
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Every article, guide and download is filed under one of these areas. Categories fill in as new material publishes.
Rooftop units, chillers and air handling.
Piping, pumps and central plant.
Contracting, compliance and federal work.
Preventive programs and service planning.
Run-time, controls and utility cost.
Filtration, ventilation and humidity.
How specific projects were delivered.
Announcements from the GMR team.
Pressure differentials, motor amp draw and temperature split are the earliest indicators that a plant is drifting. This piece walks through the readings worth logging every visit.
How filter selection and change intervals should shift with occupancy and outside air load.
Common scheduling and setpoint mistakes that show up on the utility bill long before a complaint.
The documentation agencies expect from a contractor before award, and how to assemble it early.
Files are posted here as they are finalized. Need something now? Our office can send it directly.
Codes, credentials, core competencies and contracting detail in a single page.
Recommended inspection intervals for commercial HVAC and refrigeration equipment.
An overview of GMR services, industries served and coverage territory.
Site safety practices, PPE standards and job-site conduct expectations.
Coverage terms for labor and installed equipment on GMR-performed work.
Equipment specifications and cut sheets for commonly installed systems.
Walkthroughs, equipment explainers and project features. Videos publish here as they are produced.
A walkthrough of how a commercial service visit is scoped, documented and closed out — from arrival to written findings.
What a facility manager should look at between scheduled service visits.
How walk-in and cold storage systems are staged, monitored and protected.
Registration, contract vehicles and how agencies engage the team.
Get new guides, downloads and project write-ups as they publish. No sales sequences — just the material worth keeping.