Packaged heating and cooling unit

Energy saving features include modulating heating and cooling to provide accurate and proportional temperature control, variable speed fans to balance and control the airflow, along with heat recovery options with high efficiency thermal wheel and dehumidifying pumps.

The P125 has the ability to provide solutions for between 0 to 100% fresh air.  Models YDMA 70 – 100%, YDHA 30 3 to 70% and model YDSA 0 to 30% fresh air.  The unit meets environmental concerns by offering free cooling 0 to 100% using fresh air to reduce energy consumption by the compressors and features a digital scroll compressor with 10 to 100% capacity control to reduce running costs and provide accurate temperature control.  There is also a variable air volume (standard) plug fan technology on all models, which reduces fan power for demand control ventilation.

A high efficiency integrated energy recovery (thermal) wheel is available on all models along with 10 to 100% gas modulation for close temperature control and reduced heating costs. The product also features a reheat pump option for superior part load performance.

Steve Walford, product manager, says: "For improved effectiveness and in order to maintain comfort conditions within a building along with air quality and humidity, an efficient HVAC system must be able to deal with all climatic variables. Reznor’s range of rooftop units comprising models YDSA, YDHA and YDMA have all been developed with these factors in mind."