Practical guidance for facility managers and property owners on keeping commercial HVAC systems running efficiently — written by ESCO's mechanical technicians.
Most rooftop units need two full inspections a year — once in spring before cooling season and once in fall before heating season — with filter changes every one to three months depending on your building's air quality and occupancy. Facilities near construction sites, industrial areas, or with heavy foot traffic typically need more frequent filter service.
Watch for equipment over 15 years old, frequent breakdowns, climbing utility bills, dependence on increasingly scarce R-22 refrigerant, and uneven temperatures across zones. As a rule of thumb, if repair costs are approaching half the cost of a new unit, replacement is usually the better long-term investment.
Common causes include vibration fatigue at braze joints, coil corrosion, and physical damage from maintenance work or debris. Beyond reduced efficiency and compressor risk, larger commercial systems fall under EPA Section 608 leak-repair and reporting requirements — another reason to address leaks quickly rather than just topping off refrigerant.
A solid commercial PM agreement typically covers seasonal inspections, filter changes, coil cleaning, refrigerant level checks, belt and bearing lubrication, and electrical connection tightening — plus priority response if something breaks between visits. The goal is catching small issues while they're still inexpensive to fix.
A dirty coil reduces heat transfer, forcing the system to run longer and harder to hit setpoint — which drives up energy costs and accelerates wear on the compressor. Buildup can also lead to icing, restricted airflow, and poor dehumidification, especially during humid summer months.
A BMS or DDC controls platform centralizes scheduling and setpoints across a building — or your whole portfolio — so unoccupied spaces stop being over-conditioned. You also get remote visibility and fault alerts, which often catches equipment problems before staff or tenants ever notice something's wrong.
Heat pumps deliver both heating and cooling from one system, which can mean real efficiency gains for buildings with a meaningful cooling load. In Capital Region winters, that usually means evaluating cold-climate rated equipment or a hybrid setup paired with backup heat — worth a proper load calculation before committing either way.
Schedule your boiler or furnace startup inspection before the first hard freeze, not after. Check that economizer dampers aren't stuck in an inefficient position, inspect pipe insulation in unheated mechanical rooms, and walk your emergency heat-loss procedure with staff before you actually need it.
BMS-driven scheduling, economizer tune-ups that maximize free cooling, routine filter and coil service, and sealing duct leaks all reduce operating costs — usually far more cost-effectively than deferring maintenance and running equipment into the ground.
Total system failure during extreme temperatures, burning smells, water leaks near electrical panels, or refrigerant odors all warrant an immediate call rather than waiting for the next scheduled visit — especially in facilities with temperature-sensitive operations like server rooms, cold storage, or cleanrooms.
General tips only go so far — call our dispatch line and talk to a technician about your building.
Put these tips into practice with a custom SLA-based maintenance agreement from ESCO — scheduled inspections, priority response, and one less thing to worry about.
