New Cooling Systems Sized and Installed Right
AC Installation in Allenstown for homes replacing failed units or adding central air for the first time.
Lamarche Heating & Air installs central air conditioning systems in Allenstown for homeowners replacing outdated equipment or upgrading from window units to whole-home cooling. Installation involves more than setting a new condenser in the yard—it requires load calculations to match the system size to your home's square footage, insulation levels, window placement, and ductwork capacity. An undersized unit will run constantly without cooling effectively, while an oversized system will cycle too frequently and fail to remove humidity.
The installation process starts with a walkthrough to assess your existing ductwork, electrical panel capacity, and outdoor placement options. If you are adding central air to a home that previously relied on baseboard heat or a boiler, new ducts may need to be installed in the basement, attic, or crawlspace. The outdoor condenser is positioned on a level pad with clearance for airflow, and the indoor evaporator coil is mounted to the furnace or air handler. Refrigerant lines are run between the two units, sealed, and pressure-tested before the system is charged and calibrated.
Contact Lamarche Heating & Air to schedule an in-home consultation and receive a detailed estimate based on your cooling needs.
How Systems Are Sized, Placed, and Connected
Before installation begins, the technician performs a Manual J load calculation using your home's dimensions, ceiling height, insulation R-values, and the number of windows facing south or west. This calculation determines the tonnage needed to cool your home efficiently without wasting energy. The outdoor unit is placed on a composite or concrete pad at least two feet from the foundation, away from bedroom windows to reduce noise, and with enough clearance for service access.
Once the system is running, you will notice even temperatures throughout the house, lower humidity levels, quieter operation compared to window units, and the ability to control cooling from a single thermostat. Airflow from every register will be strong and consistent, and the system will reach the set temperature without running nonstop during hot afternoons.
If your home has no existing ductwork, a ductless mini-split system may be installed instead, using wall-mounted air handlers connected to an outdoor compressor with small refrigerant lines. Installation typically takes one to two days depending on the scope of duct modifications, electrical upgrades, and the complexity of the layout. All installations include a startup check, thermostat programming, and a review of filter maintenance.
