Business Details
Emergency
services
Your Trusted HVAC Partner in Bethel Park, PA
Denillo Heating & Cooling has served Bethel Park, Upper St. Clair, and surrounding communities for over four decades, delivering reliable HVAC solutions with personal attention. Founded by Guy Denillo, known as 'The Only Guy to Call,' our family-owned business continues under son Nick Denillo, combining integrity with technical expertise. As a Trane Comfort Specialist and Mitsubishi Diamond Dealer, we offer top-tier equipment and certified technicians specializing in residential and commercial HVAC repair, installation, and maintenance.Our 24/7 emergency services ensure year-round comfort for homes and businesses across Pittsburgh's southwestern region. We prioritize customer satisfaction through transparent pricing, comprehensive preventive maintenance plans, and personalized solutions tailored to individual client needs.
Services
AC Repair
AC Installation
Furnace Repair
Furnace Installation
Heat Pump Services
HVAC Maintenance
Ductless Mini-Split
Indoor Air Quality
Commercial HVAC
Highlights and features
- 40+ years serving Pittsburgh's HVAC needs
- Trane and Mitsubishi certified technicians
- 24/7 emergency service availability
- 100% satisfaction guarantee on workmanship
- Preventive maintenance plans with service discounts
Associations and certifications
- Trane Comfort Specialist
- Mitsubishi Diamond Dealer
What people say
Quick, fair and professional
Fantastic service
Thorough explanation
Knowledgeable technician
No upselling pressure
Services
HVAC Maintenance
Our preventive HVAC maintenance ensures optimal system performance through comprehensive component inspection, cleaning, and calibration. Certified technicians check refrigerant levels, electrical contacts, thermostat accuracy, and combustion safety while providing filter replacements and ductwork assessments. Regular tune-ups reduce energy consumption by up to 30%, extend equipment lifespan, and maintain manufacturer warranties while ensuring safe indoor air quality.
AC Repair
Emergency air conditioning repair services address all makes and models with rapid response during peak summer months. Our technicians diagnose refrigerant leaks, compressor failures, and electrical issues while maintaining parts inventory for same-day repairs. We perform comprehensive diagnostics using digital gauges and thermal imaging while explaining repair options with upfront pricing before performing any service.
Furnace Installation
Expert furnace replacement services include load calculations for proper sizing and SEER-rated equipment selection from Trane and Mitsubishi. Certified installers follow ACCA protocols for duct sizing and airflow optimization while providing energy efficiency rebates documentation. New installations include programmable thermostat integration and combustion safety testing to ensure 95% AFUE efficiency in modern high-efficiency systems.
Ductless Mini-Splits
Ductless HVAC systems provide targeted temperature control for additions and difficult spaces. Our certified installers design multi-zone systems with wall-mounted air handlers connected to outdoor compressors. Installation includes refrigerant line routing through 3-inch wall penetrations and digital controller programming while maintaining 30-40% energy savings compared to central systems through inverter-driven technology.
Indoor Air Quality
Comprehensive indoor air quality assessments identify allergens, VOCs, and microbial contaminants through spore testing and particulate measurement. We install HEPA filtration systems, UV coil sanitizers, and whole-home dehumidifiers while offering duct cleaning services to achieve EPA-recommended IAQ standards. Solutions address asthma triggers and moisture-related issues through mechanical ventilation and humidity control systems.
Questions
Do you offer emergency HVAC services after hours?
Yes, our 24/7 emergency service responds to critical HVAC failures at any time. Customers have received midnight furnace repairs and early morning AC emergency visits during extreme weather conditions.
What brands do you service and install?
We specialize in Trane and Mitsubishi equipment as a Comfort Specialist and Diamond Dealer, but service all major HVAC brands including Weil Mclain, Utica, and Daikin with equal expertise.
Are financing options available for new HVAC systems?
Yes, we offer equipment financing through third-party lenders with competitive rates for qualified applicants, including special programs for energy-efficient system upgrades.
Do you provide maintenance agreements with priority service?
Our maintenance plans include seasonal tune-ups, priority scheduling, and parts warranties. The Gold Plan covers both heating and cooling system maintenance with annual service visits.
What areas do you service?
We serve Bethel Park, Upper St. Clair, South Park, Pittsburgh, and surrounding western Pennsylvania areas within a 25-mile radius of our Industrial Blvd location.
Reviews (6)
Todd Lamitina
Jun 22, 2022
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Ac went out on hottest day of the year. Dennilo had someone there fast. Quickly diagnosed and had us cool again within a couple of hours of calling. Cost was reasonable too. Service and response grade = A++++++. First time calling them but will definitely use again Service: A/C system repair
Darlene Milan
Jun 18, 2022
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Excellent in service and knowing their job! Their always great in answering any questions you might have! So professional, respectful and prompt! The BEST HVAC company around!
Dallas Slyczuk
May 22, 2022
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The tech was early, professional, stayed to explain my problem, showed me what the cause was, very awesome company, called them at 9 AM, they were at my home by 230Pm, all other services put me on a 3 day wait. Use these guys, they get it done! Very happy and satisfied. Service: HVAC system maintenance
Amelia Wolf
Apr 22, 2022
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I am preparing to sell my home and wanted to have the furnace tuned up for the next homeowners. They were affordable, easy to book and timely. My service tech, Shane, was professional, knowledgeable and took his time to explain what he was doing so that I knew what to keep an eye on in the future. I would 110% use them again and would recommend to any one looking for heating and cooling services in the areas they service.
Dg
Apr 09, 2022
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I've been without heating or cooling for days. The original company told me it would take 3 weeks. Denillo came out in one day and was the most professional, nicest company I've worked with in a long time. I have AC again! This is the only HVAC company I'll ever use Services: Heating system installation, Thermostat repair, A/C system repair, Heating system repair
Dennis Thumpston
Mar 27, 2022
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Technician was very knowledgeable and helpful while giving us an estimate for new hvac installation. They have worked on our existing system and we have always been pleased with the results. Service: Heating system maintenance
