Roof Top Unit Efficiency Gains

Conventional gas fired rooftop heaters often have efficiency ratings between 78 and 82 percent.

Roof top unit efficiency gains.

By brianna crandall april 21 2017 the u s. They are usually purchased with air conditioning units and. Department of energy through the better buildings alliance s advanced rooftop unit campaign arc is recognizing eight organizations for their energy efficiency leadership in replacing and upgrading rooftop units rtus in commercial buildings. Central air handling units economizers and controls 8.

Purpose of a rooftop unit. Manufacturer specific rtu economizer controls 7. Since 2013 300 partners have replaced or upgraded a total of 77 000 units saving over 166 million in energy costs and racking up 66 million in savings in 2016 alone. The retailer achieved an average of 50 installed efficiency gain at 40 stores and were able to reduce capacity on some units from 8 to 41.

The purpose of a rooftop unit is to distribute conditioned air within define areas of a building. Lower operating and maintenance costs. The first award largest efficiency gain for a single building rtu replacement project was presented for 60 installed efficiency gain with 41 108 tons capacity reduction achieved in a single store. Determining the true of osa air using charts and.

Lower peak usage supports better energy management for the facility and also lessens environmental impact. For example a 10 ton unit required to meet an efficiency of 18 0 ieer achieved a 20 8 ieer a nearly 16 percent improvement. Rooftop units are connected to ductwork which provides a defined route for the conditioned air to travel along. Rooftop units provide comfort and efficiency offering.

In several cases that goal was exceeded. Typical economizer controls of rooftop units that utilize honeywell controls 6. Now in our last tutorial we looked at air handling units or ahu s. The constant innovation in rooftop unit rtu design is driven by new demands for higher energy efficiency and local regulations.

Types actuators characteristics 9. Longer equipment life than heat pump units. Fast morning warm up and response times. Target a previous award winner was recognized for the largest efficiency gain for a multi building rtu replacement project.

The efficiency gains are significant. Easily maintainable and replaceable systems. Increasing rooftop unit efficiency not only reduces energy use but also lowers peak usage time which is power used during the hours when the energy grid suffers the greatest strain. High performance rtus may have an integrated eer ieer of 17 or more.

Lower operating costs or standards such as leed include requirements for new low gwp refrigerants and create the need for products to support these changes in rtu designs. Economizers on packaged roof top uints 5.