Systems and methods for monitoring the condition of an air filter and of an hvac system

A system for monitoring the condition of an air filter installed in an HVAC system of a building unit and for monitoring the condition of a temperature-control unit of the HVAC system, the monitoring system comprising:

• a single, filter-mounted sensing unit configured to acquire data representative of at least a first temporal parameter of the HVAC system and to wirelessly transmit the data,
• and,
• a remote processing unit configured to receive the data and to process the data to obtain an indication of the condition of the air filter and to report the condition of the air filter,
• wherein the remote processing unit is also configured to process the data to obtain an indication of the condition of the temperature-control unit of the HVAC system and to report the condition of the temperature-control unit.