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Home » Authors » Vishal Patwari
Vishal Patwari

Vishal Patwari

Vishal Patwari, LEED AP, CEM, is a seasoned HVAC engineer specializing in high-efficiency ventilation, energy optimization, and sustainable building design. As the Lead Engineer Developer for Ultra-High Performance (UHP) projects at Budderfly, he brings extensive experience in commercial HVAC systems, demand-controlled ventilation, and indoor air quality solutions. Vishal collaborates with contractors and facility managers to implement cost-effective, performance-driven airflow strategies, helping businesses optimize energy efficiency and comfort and bridge the gap between design and real-world application.

Articles

ARTICLES

Make Up Air Vishal

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 Budderfly
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.


Read More
resturant-hvac-system.jpg

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

Vishal Budderfly
Vishal Patwari
June 5, 2025

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


Read More
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