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Sheet 02 — Commercial

Buildings

Warehouses, workshops, offices, clinics and trade counters across Central Texas, on written schedules with a record per unit.

02.1

Building types and what dominates each one

BuildingWhat usually drives the workWhat we watch
WarehouseHeat gain through the roof in summer and dock doors in winter.Destratification, unit heaters, make-up air, and the office end on its own system.
WorkshopProcess heat and extract that nobody sized against a supply.Building pressure, filter loading, and whether the extract fights the entrance door.
Office suiteZoning that stopped matching the floor plan two tenants ago.Thermostat locations, schedules, and returns cut off by partitions.
ClinicRooms that need their own temperature and their own air.Outdoor air rates, pressure between rooms, and out-of-hours access.
Retail / trade counterA door open to the weather on equipment sized for a sealed box.Capacity against the real load, and the door behaviour that undoes it.
Restaurant kitchenExtract without a deliberate route for make-up air.Hood capture, building pressure, and any flued appliance in the same room.
02.2

The five calls

  1. One end is wrong

    Airflow before capacity. We measure per room and rebalance rather than dropping the setpoint for everybody.

  2. Water over a ceiling

    Blocked condensate, an unprimed trap, or a corroded pan. We clear it, then find out why.

  3. It runs outside your hours

    Old schedules, an override nobody cancelled, or a controller clock that has drifted.

  4. A unit is short-cycling

    Hard on a compressor and always a symptom. We find the reason rather than resetting it.

  5. The doors whistle

    Building pressure. Almost always extract fitted without a supply, and it is fixable.

A suspended unit heater high in a Central Texas warehouse roof
02.3

Central Texas is a cooling problem with a heating footnote

Most of the year the work here is rejecting heat. A rooftop unit in Waco spends its summer running against a roof surface far hotter than the air temperature, with a condenser coil that fills with cottonwood seed and dust from whatever is being built next door.

That is why coil condition and airflow dominate our reports, and why we care more about the state of a condenser than about the age on the nameplate. A clean fifteen-year-old unit will out-work a neglected eight-year-old one, and we grade on what we measure rather than on the year it was made.

The heating footnote still matters. A hard freeze arrives here every few winters, and when it does it finds the unit heaters nobody has started since March and the pipe runs nobody has looked at. We check those in October, because in January they are somebody's emergency.