Heat Pump Installation: Facts and Preparation

Below are some aspects to think about before you install a new HVAC system for heating, e.g. an air source heat pump*:

Location: Choose an appropriate location for the outdoor unit (condenser/compressor) that allows for proper airflow and minimal obstruction. It should be placed on a stable, level surface away from obstructions such as plants, debris, or structures that could impede airflow.

Sizing: Properly size the heat pump system based on the heating and cooling load requirements of the space. Undersized units may struggle to maintain comfort levels, while oversized units can lead to short cycling and reduced energy efficiency.

Insulation: Ensure proper insulation of the building to minimize heat loss in winter and heat gain in summer. Well-insulated walls, windows, and doors help the heat pump operate more energy efficiently by reducing the workload.

Airflow: Maintain adequate airflow around both the indoor and outdoor units to optimize performance. Ensure that there are no obstructions blocking airflow to or from the units.

Refrigerant Lines: Install refrigerant lines properly, ensuring they are adequately insulated and free from kinks or bends that could restrict refrigerant flow. Proper sizing and insulation help maintain optimal system efficiency.

Drainage: Plan a place for the outdoor unit where you can have proper drainage for condensated water generated during operation. Ensure that drain lines are installed with the necessary slope and not too close to your building to prevent water buildup and potential damage to the system.

Defrost Controls: You might need to install defrost controls, especially in cold climates, to prevent ice buildup on the outdoor unit during heating mode. Proper defrost cycles help maintain efficient operation in cold weather conditions.

Controls and Thermostat: Install and calibrate the thermostat and controls according to manufacturer guidelines. Proper programming and settings ensure optimal comfort and energy efficiency.

Commissioning: Once installation is complete, commission the system to ensure proper operation and performance. Verify refrigerant charge, airflow, and overall system functionality through testing and adjustments as necessary.

Maintenance: Read the instructions from the heat pump manufacturer so that you maintain regular maintenance tasks such as cleaning or replacing air filters, clearing debris around outdoor unit, and scheduling professional inspections and maintenance when recommended.

Warranty and Documentation: Keep thorough documentation of the installation process, including warranties, manuals, and service records. Ensure that you receive all necessary information for proper operation and warranty coverage.

The above is not a complete list of installation procedures. If you are not experienced with HVAC installations, you should consult with a qualified HVAC professional to ensure proper installation and compliance with all requirements. Please see link below to companies with HVAC professionals recommended by MSC (Microgeneration Certification Scheme). When making contact always ask whether they have a BUS verified installer account and are eligible to apply for BUS vouchers. See also UK Heat Pump Subsidies.

Get in touch with HVAC professionals to help you with your installation by clicking on "Find Installer" on the homepage navigation bar.

*The information given here is not a thorough list of installation procedures nor is guaranteed to be complete and correct. If you are not experienced with HVAC installations, you should consult with a qualified HVAC professional to ensure proper installation and compliance with all requirements.