Vishal Patwari

Articles by Vishal Patwari

Half of the Make-Up Air Units in QSR Kitchens Are Failing, but the Industry has no Way to Know

Following survey results from restaurants across the country, Budderfly's senior energy engineering manager says the answer is more diagnostics – not more ventilation

Vishal Patwari

May 7, 2026

A 251-site test-and-balance field study across forty national and regional quick-service brands found 91% running net-negative pressure, 46% of make-up air units not working, and a median imbalance of nearly 1,900 CFM.

The Invisible HVAC Issue Costing Restaurants — And How to Fix It

Vishal Patwari

June 5, 2025

Most restaurant HVAC problems boil down to one invisible issue: negative pressure.

On Demand As AI workloads and high-density computing push traditional cooling methods to their limits, the data center industry is accelerating the adoption of next-generation HVAC technologies.

In this session, we will cover how to design VRF systems for the U.S. market using new A2L refrigerants. These systems provide an advanced zoning solution by using inverter technology to deliver precise heating and cooling control across multiple zones and spaces.

Articles by Vishal Patwari

Half of the Make-Up Air Units in QSR Kitchens Are Failing, but the Industry has no Way to Know

The Invisible HVAC Issue Costing Restaurants — And How to Fix It

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