How Do Albuquerque Evaporative-Cooler Conversions Work?

The load calculation treats the house as it is, not as the cooler assumed it was. The engineer measures or verifies insulation levels, window areas and orientations, air leakage, and internal gains, then computes the design heating and cooling load for Albuquerque's design temperatures. That number - not the cooler's tonnage, not a square-foot rule of thumb - selects the equipment. In a well-shaded adobe or a leaky 1960s ranch, the right size can differ dramatically from what a contractor might guess, and the calculation is the document that justifies it. Duct design follows the room-by-room loads. Supply runs are sized for the airflow and the static pressure the selected air handler can deliver, with short, straight, sealed runs preferred over the long flex duct sags that strangle performance. Return air gets a designed path - grilles, chases, or ducted returns - because a system that cannot get air back to the equipment cannot deliver comfort no matter how well the supplies are sized. The design includes a commissioning checklist: measured airflow per room, verified against the design, before the contractor leaves.

The electrical check is arithmetic the AHJ will verify. The engineer performs a load calculation on the existing service, adds the condenser, air handler, and any electric heat, and determines whether the panel and service conductors suffice or an upgrade is required. Many Albuquerque homes make the jump from 100 to 200 amps in the same project, which also future-proofs for an electric water heater or vehicle charger. The permit set shows the panel schedule, the feeder sizing, and the grounding - the details the electrical reviewer checks. The old cooler leaves a hole, and the envelope repair is engineered, not patched. A roof curb removal gets the roof structure reframed, sheathed, dried-in, and flashed to match the existing roofing; a window unit opening gets reframed and finished to match the wall. The engineer specifies the repair so the thermal envelope and the weather barrier are continuous again - air sealing and insulation at the repair are part of the energy performance the conversion promises. Skipping this step carefully is how conversions develop the roof leaks owners blame on the new equipment.