

Rapid, around the clock repair service to restore heating or cooling when your system fails unexpectedly.
Scheduled maintenance that improves efficiency, extends equipment life, and prevents costly breakdowns.
Fast, accurate diagnostics and repairs for all HVAC system types to restore comfort and performance.
Professional installation of new HVAC systems designed for long term comfort, efficiency, and reliability.
Full system replacement services that upgrade your home with modern, energy efficient heating and cooling.
Expert service for forced hot water and steam heating systems to ensure steady, dependable heat throughout your home.


























New England winters demand a heating system you can rely on. Dalelis Mechanical provides professional heating installation, repairs, and seasonal maintenance to keep your home warm when it matters most. Our licensed technicians service all major systems, from furnaces and boilers to heat pumps.
With decades of combined experience, we bring precision, safety, and peace of mind to every job. When you need trusted heating experts in Norwood, count on Dalelis Mechanical.

Stay cool and comfortable with Dalelis Mechanical’s professional air conditioning repair, installation, and maintenance services. Our experienced technicians ensure optimal performance and airflow so your home maintains consistent comfort during the hottest months. We specialize in diagnosing issues quickly and delivering long-term solutions.
For dependable air conditioning services in Norwood, MA and nearby towns, trust Dalelis Mechanical to keep your cool air flowing all summer long.

Canton sits just south of the Blue Hills Reservation, where neighborhoods like Ponkapoag, Canton Center, and the Summer Heights area each have their own character and their own HVAC needs. Older colonials along Washington Street and near the Paul Revere Heritage Site often run original boilers or aging forced-hot-water systems that need careful attention. Meanwhile, the raised ranches and split-levels built through the 1950s and 1970s in eastern Canton may be due for a full system upgrade or ductwork replacement. Dalelis handles it all, from boiler repair in a 1940s cape to a new central air installation in a recently built home off Pleasant Street.
Our Norwood shop is only about 5 miles from Canton Center, which means our trucks are on-site fast for both scheduled maintenance and emergency calls. We service furnaces, heat pumps, central air conditioners, mini-splits, and ductless systems across town. Whether you live near Ponkapoag Golf Course or closer to the Canton Junction commuter rail stop, you can count on the same straightforward pricing and licensed technicians on every visit.
Canton homeowners also rely on us for seasonal tune-ups that keep heating and cooling systems running efficiently through New England winters and humid summers. If your energy bills have been creeping up or your system cycles on and off more than it should, give us a call. We will diagnose the problem, explain your options, and let you decide what makes sense for your home and budget.

When your HVAC system starts making strange knocking, grinding, or loud gurgling noises, it is a clear sign that a component is failing and getting ready to break down. While the unit may still be operational, you should turn it off immediately to prevent further damage. When you hear abnormal noises, reach out to James A. Dalelis Plumbing & HVAC as soon as possible for urgent diagnostics.
If your HVAC system is blowing cold air in the winter while the heater is on, or hot air in the summer when the AC is on, it's time to reach out for emergency HVAC repair. When your system is pushing out air that matches the temperature outside, you're likely dealing with blocked airflow or a broken compressor. Contact James A. Dalelis Plumbing & HVAC and our team will inspect and repair your system right away.

If cool or warm air is only trickling from your vents instead of blowing with full force, it signals that the system is struggling and requires emergency HVAC repair. Weak airflow is typically a sign of components that are malfunctioning or completely worn out. Issues like clogged air filters, dirty coils, failing blowers, or obstructions in the ductwork could cause this problem. If your HVAC system is giving out weak air flow, contact James A. Dalelis Plumbing & HVAC right away.
It's normal for HVAC systems to run more frequently during extreme temperatures, but the time between cycles should stay roughly consistent. If your HVAC system is turning on or off more often than usual, you're likely dealing with a serious issue that needs emergency repair or even replacement. Contact James A. Dalelis Plumbing & HVAC for emergency HVAC services.
If your home is becoming increasingly hot during a summer heatwave, or if your furnace fails to provide heat during a Massachusetts cold snap, you are likely facing an HVAC emergency. In these moments, it is important to take two simple, immediate steps:
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Fast, efficient, and professional. I went to turn my heat on and realized my boiler wasn’t working. It was a Friday before a long holiday weekend but James had one of his guys there first thing Monday morning and my heat was back up and running in just a few hours! Thank you so much!! Highly recommend
Met with me on short notice and took the time to talk about all options, but brief and to the point.
Helped me make a better decision.
Went above and beyond so the work got done in a timely manor and we're very satisfied with the results.
Thank you, James & Crew.
Excellent service. Responded quickly to confirm my appointment and the work was completed quickly the same day. We will be using this company for our yearly heating maintenance.
I had a great experience working with James and his team to install our new boiler and water heater. He worked to understand our needs, gave us solid advice, and provided a competitive bid with no extras or upsells (and no BS!). His work was very professionally done, and it was obvious that he took great pride in his work and in providing the most useful components. He also took the time to explain the work, how the equipment worked, and made sure the settings were what we we were looking for. All in all a great experience, and we will be working with him again.
Dedham, Sharon, Westwood, Walpole
5 miles southeast
Most furnace repairs in Canton range from $150 to $500 depending on the issue. A faulty ignitor or blower motor replacement will be on the lower end, while a cracked heat exchanger can cost more. Dalelis provides a written estimate before starting any work so you know the full cost upfront.
Many of Canton's older colonials still run on original or decades-old boilers. If your boiler is over 20 years old and needing frequent repairs, upgrading to a high-efficiency unit can cut your heating bills significantly. We can evaluate your current system and help you weigh the cost of ongoing repairs against a new installation.
Yes. We provide emergency heating and cooling repair for Canton residents. Our Norwood location is only about 5 miles away, so we can typically reach your home quickly when your system goes down unexpectedly, even on nights and weekends.
Start with a professional energy assessment of your system. Many Canton homes, especially the older colonials and raised ranches, have aging equipment running below 80% efficiency. Upgrading to a 95%+ AFUE furnace, sealing leaky ductwork, or adding a programmable thermostat can reduce your heating bills by 20 to 30 percent. We offer free estimates and can walk you through the options.