About Mark Corna Heating and Cooling
A family-owned Shelton business built on four decades of hands-on HVAC craftsmanship and honest service.
Our Story
Four Decades of Craft. One Standard: Done Right.
Mark Corna founded his heating and cooling company in April 2001, bringing decades of hands-on trade experience to homeowners and businesses across the lower Naugatuck Valley. Today, with more than 42 years in the trade, Mark and his team have served over 5,000 homes throughout Shelton, Milford, Monroe and the surrounding communities.
As a family-owned and operated business, we treat every home like our own. That means honest diagnoses, upfront pricing you approve before work begins, and repairs and installations backed by real warranties. It is why more than 3,500 customers keep calling us back, season after season.
Whether it is a midnight no-heat emergency, a high-efficiency system upgrade, or a seasonal tune-up, we bring the same promise to every job: Total Home Comfort.
Years in the Trade
Homes Served
Satisfied Customers
Satisfaction Rate
What We Stand For
Values That Drive Every Job
Honesty First
Upfront quotes before any work begins. You always know the price — no hidden fees, no surprises.
Real Expertise
EPA-certified, factory-trained technicians with a Master Contractor License backing every job.
Fully Protected
Licensed and insured with $2 million in liability coverage, and warranties on our workmanship.
Done Right, Fast
Same-day repair for most issues and 24/7 emergency response when you need us most.