Informing & Supporting
Conditioning Air Professionals & the Industry
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2:14 am, April 24, 2025
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Cool Air Products Introduces Sigma Cap – pod combinations replace hundreds of different single and dual capacitor sizes

The Sigma Cap starter kit contains 1-2.5mfd, 2-5mfd, 1-10mfd, 2-15mfd, 2-20mfd, 1-30mfd & 2-25+5mfd
A Sigma Capacitor primary unit (top pod) 25+5mfd stacked on top of a single 10mfd pod capacitor to make 35+5mfd

Cool Air Products introduces the patented Sigma Cap designed for users in the HVAC industry to quickly and efficiently replace a wide variety of capacitor sizes from singles and duals.

Simple to use, the Sigma Cap can be used as a standalone unit or stacked to get the MFD value needed. Individual pods are available to adjust stock for common builds. Users can rotate and stack the pods to add capacitance on the correct side to build the dual capacitor when needed. 

A Sigma Cap starter kit that includes seven different sizes is available, 11 capacitors total, and when paired with alternate sizes, will replace hundreds of both single and dual 370/440V capacitors allowing users to always have the right size capacitor to finish the job without needing an additional trip to the supply house. 

“The Sigma Cap helps technicians finish service jobs in one trip since they always have the right size capacitor,” said Mike Walton, president, at Cool Air Products. “Sigma Caps are designed to minimize the need to stock various capacitors.”

The Sigma Cap is the first field-assembled, dual-run capacitor. Made in the U.S., all units are dual-rated for 370/440 VAC. 

The units are sold individually to restock kits and additional sizes, not included in kits, are also offered individually.

For more information on the Sigma Cap, visit: https://www.coolairproducts.net/products/sigmacap. To view a video on the Sigma Cap, visit: https://youtu.be/2Ca9MdUi3FE?list=TLGGMsDK1IGvWS4yMjAxMjAyNQ.

About Cool Air Products
Cool Air Products is a US-based producer of HVAC solutions with problem-solving products that are cost effective and efficient. The company’s revolutionary brands, with patented technology such as SmartSeal, SmartShot, Combat P-Trap, and Sigma Cap, are part of its product lineup. These include products for AC leak prevention and repair, additives, condensate management, capacitors, and specialty chemicals.

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Informing & Supporting
Conditioning Air Professionals
& the Industry