Resources

The Problem with Oversized HVAC Systems

Problem: HVAC systems are typically sized for full load conditions, which only occur for a small percentage of the year. The rest of the time that system is oversized, which can lead to many operational issues. Oversizing HVAC systems is a common industry practice to create safety margins when conditions… Read More

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Retrofit Existing R-410A HVAC Equipment Rather than Replace

​​Simplify Operations and Enhance Customer Satisfaction: Introducing the APR Control HVAC professionals face constant pressure to balance budgets, customer demands, and industry changes. The APR Control offers a cost-effective solution to simplify operations and maximize existing resources. By extending the life of your customers’ in-place R-410A… Read More

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APR Control Direct Compressor Energy Savings

APR Control Compressor Power Consumption Testing Parameters An HVAC equipment manufacturer conducted a test in their state-of-the-art testing facility to assess the direct energy-saving benefits of utilizing the APR Control at part load conditions. Original equipment performance parameters: 10-ton rated at AHRI 210/240 Two 5-ton stages… Read More

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Adding an APR Control to Heat Pumps

The APR Control Enhances Heat Pumps In the case of heat pumps, you have to prioritize capacity for either cooling or heating.  If you are prioritizing and sizing for the heating load, the result will often be excess cooling capacity. The APR Control will… Read More

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APR Control Training Resources

Rawal Devices proudly offers Free, Live, online webinars to educate you, your service & sales team, as well as your customers on the APR Control. Below are a variety of trainings we offer regularly. We can also provide completely customizable trainings, just feel free to contact… Read More

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APR Control Compared to Variable Speed Alternatives

APR Control vs. Digital Scroll & Other Variable Speed Technology Engineers, Technicians & Contractors are curious about how the APR Control compares to similar technologies that provide system compressor and capacity modulation. This page shows the similarities and differences of Digital Scroll Compressors, VRV or VRF Systems cost, performance,… Read More

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Oversized Air Conditioning Solution

Your typical air conditioning system and control sequence… Air conditioning systems are primarily on/off devices of a fixed capacity, controlled by the limits of the thermostat. A standard thermostat, when set at 72°F (with +/- 1°F range), will turn the air conditioning on at 73°F and cool the space, at… Read More

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Precise Temperature & Humidity Control Solution

Many applications, including surgery suites, clean rooms, high-precision manufacturing, etc., have tight temperature and humidity requirements that can benefit from the addition of the apr control. By providing continuous capacity modulation to match changing load conditions, the apr control has helped correct many under-performing systems. Read More

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The Rawal APR Control is a variable capacity enhancement to DX HVAC systems.