Indoor Cannabis Grow Room HVAC

Meeting Cannabis Grow Room HVAC Challenges

Mechanical HVAC systems can be the greatest limiting factor or the greatest opportunity to maximize productivity and profits in the indoor Cannabis Cultivation Industry. Those involved in HVAC for Cannabis design, service, and operations are realizing that undersized or oversized systems from inaccurate load calculations for a given room lead to major challenges.
The lack of traditional funding for cultivators is a key contributor to underperforming HVAC design choices leading to poor crop yield and ultimately – Less Profit! Rawal Devices has seen poorly designed, and underperforming cultivation facilities that were in desperate need of control improvements without replacing the equipment. The APR Control will provide the perfect solution to improve both existing and new air conditioning equipment performance and reliability.
Rawal Devices has modulating technology, both mechanical and electronic, that transforms standard systems into variable capacity systems. This is critical for growing cannabis! With the APR’s ability to provide capacity modulation and precision discharge air control, your units will be able to meet ever-changing room criteria to maximize your plant yield and your customers’ profits!

Common Problems Associated with Oversized DX Air Conditioning Systems

Diagnosing or troubleshooting your customer’s air conditioning unit can be a daunting task, which can take up a lot of your time and potentially deplete your warranty reserve. One of the most overlooked issues is having too much cooling capacity as most commercial DX air conditioning systems are oversized for most of the year. As a result, you will likely experience:
Short Cycling, higher than desired humidity levels, varying and uncomfortable space temperatures, potential coil freezing and more. If you’re experiencing any of these issues, we have a solution for you and your customers! The APR Control!

APR vs Hot Gas Reheat Comparison Table

The In-Stock Solution for Hot Gas Reheat Applications!

Rawal Devices understands there are a multitude of reasons why customers request a system with Hot Gas Reheat (HGRH); such as the need for additional dehumidification capabilities that off the shelf equipment cannot provide.

Although hot gas reheat has been a common method to achieve design goals including dehumidification and temperature control, the APR Control is often a less expensive preferred design solution. There are plenty of projects that can be successful with just the APR Control’s continuous capacity modulation capabilities.

Frozen Compressor

How to Prevent Evaporator Coil Freezing and Compressor Floodback/Slugging!

During part-load or non-design day conditions or with lower airflow, you’re going to have less total heat content across the evaporator coil compared to your compressor capacity. Having enough heat content in the air entering the evaporator is critical to prevent Evaporator Freezing and Liquid Slugging or Floodback.

The APR Control’s ability to provide variable capacity control through mechanical means allows your system to match capacity of your equipment to the total heat load across the evaporator coil.

Rawal Devices’ APR Control can eliminate or prevent common problems associated with DX cooling – including eliminating Evaporator Coil Freezing and Liquid Slugging!

As a result, APR Control reduces downtime from labor-intensive service calls and costly warranty issues, make the APR Control a very cost-effective solution for problems occurring on you existing equipment and even on new systems!

The APR Control is Better Than Hot Gas Bypass!

As the APR Control has been embraced by the industry, it has often mistaken for and compared to Hot Gas Bypass. There are key differences that separate the two solutions, especially in terms of superior dehumidification the APR Control provides. Learn more about why the APR Control is the preferred solution!

Chart explaining how to identify and fix high humidity issues

Solving High Humidity Challenges in HVAC Systems

One of the biggest contributing factors to high humidity is the lack of compressor run-time, commonly known as short cycling. This is often a result of a system being oversized, providing too much cooling capacity for a space, and satisfying the thermostat too quickly. Having some form of capacity control is the most effective way to prevent short cycling from occurring and the APR Control is the perfect solution!

Rawal Devices’ APR Control offers a simple, reliable, and cost-effective solution that can eliminate or prevent high humidity because of compressor short cycling.

Installing APR Control at WMUR

Avoid Costly HVAC Callbacks

In HVAC Service, callbacks and warranty issues are an enormous problem and headache for HVACR contractors and service technicians. With the addition of the APR Control, you can eliminate callbacks on new equipment and improve performance of older/in-place equipment, saving you both time and money!

Of course, contractors should always follow best practices when it comes to start-up and commissioning newly installed equipment to ensure proper operation. However, callbacks can be inevitable and are not necessarily a result of anyone’s failure to install the part or equipment properly. More often than you might think, callbacks and warranty issues are related to equipment problems.

Capacity Control with APR Control

Why Does DX Air Conditioning Need Capacity Control?

Everyday contractors, engineers, and building owners across the country turn to the ease of DX air conditioning for a variety of reasons.

The challenge with DX systems is that they are oversized by design! This is due to the fact the cooling capacity (tonnage) of these systems are selected based on the space’s “design day” conditions. For those unfamiliar, a “design day” also commonly referred to as peak load conditions, takes into account the full ambient (highest outside temperature for the region) load, full building occupancy, all lights, computers and other equipment are on, occupant fresh-air ventilation, etc. The problem is that this “design day” rarely occurs. This means that the unit will be providing too much cooling capacity the majority of the time. Depending on where you are in the country, an oversized unit can have dire consequences for the indoor space and equipment.

Make Preventative Maintenance More Effective with the APR Control

Recommending the APR Control during preventative maintenance could be one of the best preventative solutions you, as a contractor or service technician, can offer to address problems before they become ongoing customer complaints.

We have officially entered Spring, which means all of you contractors and service technicians are performing routine preventative maintenance on the HVAC equipment for your customers.
Preventative maintenance provides the opportunity to diagnose the system a bit more thoroughly than you otherwise would during an emergency service call where the problem is immediate and appears obvious.

The addition of the APR Control is a cost-effective and reliable solution that can be field installed on virtually any existing DX equipment to maximize efficiency, performance, and lifecycle!

APR 410

Lead with the APR Control; Preferred Choice for Air Conditioning Part Load Requirements

Our APR Control has helped engineers for over 30 years to design and specify exceptional air conditioning systems and solutions. How so? Here are just a few reasons why:

• It’s budget friendly
• It can provide greater turndown than current air conditioning tech by 80%
• It excels at applications for VAV, dehumidification, MUA/fresh air, etc.
• Variable occupant load

The APR Control capacity modulation has been embraced throughout the industry as an excellent solution for part-load modulation requirements.

Learn more about why APR Control is the preferred choice for air conditioning, and how you can sign up for a webinar customized to solve your team’s design challenges.