Design

Note for building owners: Give preference to systems that can operate at cold outdoor temperatures (e.g. down to -20/-25°C) to get the most out of your heat pumps.

Definitions:

• A hybrid system uses a mix of heat pump and gas.

• The switchover temperature is the outdoor temperature at which the system switches between heat pump mode and gas mode.

• The switchover temperature should be set as low as acceptable.

Confirm if any noise mitigation strategies are required.

Confirm the system is either

• compatible with available electrical capacity.

• or increases capacity as little as possible while maximizing performance, e.g. selecting and choosing a hybrid system.

Applicable to RTUs only.

For building owners:

Every building benefits from a backup heating plan (e.g. equipment that only turns on when the main system fails or is undergoing maintenance).

Choose a backup heating system that works for your goals and building; if your priority is to turn off gas, avoid gas backup.

If incompatible, provide required upgrades/replacements.

• Provide and implement a commissioning plan, and provide a comprehensive warranty.

• Create a plan to minimize tenant disruption during construction.

• Provide maintenance services, if needed.