Business Details
50+ Years
experience
Emergency
services
Your Trusted HVAC Experts in Cleveland
Original Donnelly has been serving Northeast Ohio homeowners since 1963 with expert HVAC, plumbing, and electrical solutions. As a family-owned business, we combine over 60 years of experience with factory-trained technicians to deliver reliable repairs and installations. Our commitment to customer satisfaction includes 24/7 emergency service, upfront pricing, and a No Surprise Guarantee. We specialize in heating, cooling, water purification, and electrical upgrades while maintaining an A+ BBB rating.With over 2,600 five-star Google reviews, we prioritize timely service, transparent communication, and protecting customers' homes during every visit. Our team provides personalized solutions for furnace repair, AC installation, tankless water heaters, and more. We maintain industry certifications and offer financing options to ensure accessible home comfort solutions for all clients.
Services
Furnace Repair
AC Installation
Plumbing Services
Electrical Upgrades
Water Heater Repair
Duct Cleaning
Tankless Water Heaters
Sump Pump Systems
Generac Generators
Air Purification
Details
- Year established: 1963
Highlights and features
- Family-owned with 60+ years serving Northeast Ohio
- 24/7 emergency service available for urgent needs
- No Surprise Guarantee on all service pricing
- Financing options for HVAC and plumbing upgrades
- Factory-trained technicians with industry certifications
Associations and certifications
- Angie's List Super Service Award
- BBB A+ Rating
What people say
Friendly, professional technicians
24/7 emergency availability
No surprise pricing
Energy efficiency expertise
Over 60 years experience
Services
Furnace Repair
Our certified technicians provide comprehensive furnace repair services for gas, electric, and hybrid systems. We diagnose issues with ignition, airflow, and thermostats while ensuring safe operation. Customers receive detailed explanations of repairs and maintenance options.
AC Installation
We install energy-efficient air conditioning systems with proper sizing and refrigerant charge. Our team handles ductwork optimization and thermostat integration for optimal home comfort. All installations meet local building codes and manufacturer specifications.
Plumbing Services
From leak repairs to water purification systems, our licensed plumbers handle residential needs. Services include water heater installation, sump pump maintenance, and pipe leak detection using modern diagnostic tools.
Electrical Upgrades
We provide electrical panel upgrades, generator installations, and safety inspections. Our licensed electricians ensure proper wiring for whole-home generators and EV charging stations while maintaining NEC compliance.
Water Heater Repair
Our technicians service both traditional tank and tankless water heaters. We offer repair, replacement, and maintenance plans with energy-efficient options that reduce utility costs up to 30%.
Questions
Do you offer emergency HVAC service?
Yes, we provide 24/7 emergency service for heating and cooling system failures with no extra charge for after-hours visits.
What areas do you service?
We serve Cleveland and surrounding Northeast Ohio communities including Middleburg Heights, with two local service centers for faster response times.
Can I finance HVAC replacements?
Yes, we offer financing options for furnace, AC, and water heater replacements with approved credit through multiple lending partners.
Are technicians licensed and insured?
All our technicians are licensed, insured, and factory-trained with ongoing manufacturer certifications for HVAC, plumbing, and electrical systems.
Do you provide service guarantees?
We stand by our work with a No Surprise Guarantee covering both parts and labor for all completed repairs and installations.
How can I schedule service?
Schedule through our website, call or text (216) 545-1776, or use the 'Click to Schedule' feature for same-day and emergency appointments.
