Here at DZ Electrical Contracting, we perform complete residential, commercial services of any kind, from basic repairs, trouble shooting, to custom requests. We do repairs, upgrades and installations of all types and sizes. We are always on time and on budget, trust the people who think of your needs first every time. We're here to solve problems, not create them. Give us a call today!
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Dom M on October 2024
Here at DZ Electrical Contracting, we perform complete residential, commercial services of any kind, from basic repairs, trouble shooting, to custom requests. We do repairs, upgrades and installations of all types and sizes. We are always on time and on budget, trust the people who think of your needs first every time. We're here to solve problems, not create them. Give us a call today!
Contact us for all of your heating and air conditioning installs or replacements. We also do install and repair of boilers and furnaces. We service all of Suffolk and Nassau counties. We are a member of the Better Business Bureau, EPA certified, and a member of PSEGLI Cool Homes Contractors.
"We just got a new AC unit and oil furnace installed. We couldn’t be happier ! They were very professional from the start. They were so good with all the details and took away our old units , very clean and organized and super nice guys. I already gave my family his info so they will be calling them in the future. The owner makes us his priority and does everything from start to finish. Gave us a great price and wonderful dealing with them.
If we ever need anything in the future we will certainly call them. I highly recommend them.
Nanci & franco "
franco f on July 2025
Contact us for all of your heating and air conditioning installs or replacements. We also do install and repair of boilers and furnaces. We service all of Suffolk and Nassau counties. We are a member of the Better Business Bureau, EPA certified, and a member of PSEGLI Cool Homes Contractors.
"We just got a new AC unit and oil furnace installed. We couldn’t be happier ! They were very professional from the start. They were so good with all the details and took away our old units , very clean and organized and super nice guys. I already gave my family his info so they will be calling them in the future. The owner makes us his priority and does everything from start to finish. Gave us a great price and wonderful dealing with them.
If we ever need anything in the future we will certainly call them. I highly recommend them.
Nanci & franco "
At Jah Bless HVAC/R inc, our Company is based on the belief that our customers' needs are of the utmost importance. We have a Diagnostic charge if using our company the charge is waived. If not using our company the charge will be applied. Our team is committed to meeting those needs. We welcome the opportunity to earn your trust and deliver you the best service possible at the first time. We treat all customers with the utmost respect and class.no partialities from our experienced team. Call 917-561-9766 or email us at [email protected] "Customer Service is not everything, Great Customer Service is our only thing." So because of you the Customers, we exist.
"Very professional. excellent job"
Michael M on July 2025
At Jah Bless HVAC/R inc, our Company is based on the belief that our customers' needs are of the utmost importance. We have a Diagnostic charge if using our company the charge is waived. If not using our company the charge will be applied. Our team is committed to meeting those needs. We welcome the opportunity to earn your trust and deliver you the best service possible at the first time. We treat all customers with the utmost respect and class.no partialities from our experienced team. Call 917-561-9766 or email us at [email protected] "Customer Service is not everything, Great Customer Service is our only thing." So because of you the Customers, we exist.
We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade, and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business.
"They were on time, very efficient and did the work as expected "
robert B on November 2025
We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade, and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business.
"They were on time, very efficient and did the work as expected "
NOTE I M SORRY FOR ALL , WE NOT DOING ANY TYPE OF PLUMBING, WORK. OIL FURNACE,OIL BOILER , OIL HOT WATER HEATER, WE ARE DOING GAS FURNACE, AND HEAT PUMP SYSTEM HEATING AND AIR CONDITIONING.THAT'S ALL , WE DONT DO BASEBOARD, RADIANT,ANY OIL APPLIANCE OR PLUMBING WORK . THANKS FOR UNDERSTANDING. MSD Heating and Cooling is now offering free estimates for all AC replacements and new installations. We have been in the business for over 18 years and we've been lucky enough to learn a thing or two over those years. We've even worked hard to make sure that our staff knows the most up-to-date information about all of your heating and cooling needs. Keeping you cool and warm is our goal!
"Reasonable price great work friendly and very clean staff"
Huseyin a on May 2022
NOTE I M SORRY FOR ALL , WE NOT DOING ANY TYPE OF PLUMBING, WORK. OIL FURNACE,OIL BOILER , OIL HOT WATER HEATER, WE ARE DOING GAS FURNACE, AND HEAT PUMP SYSTEM HEATING AND AIR CONDITIONING.THAT'S ALL , WE DONT DO BASEBOARD, RADIANT,ANY OIL APPLIANCE OR PLUMBING WORK . THANKS FOR UNDERSTANDING. MSD Heating and Cooling is now offering free estimates for all AC replacements and new installations. We have been in the business for over 18 years and we've been lucky enough to learn a thing or two over those years. We've even worked hard to make sure that our staff knows the most up-to-date information about all of your heating and cooling needs. Keeping you cool and warm is our goal!
"Reasonable price great work friendly and very clean staff"
Allined Mechanical, we pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular project. We look forward to earning your business!
"Competent, professional, expert service. They did a very thorough, neat job in repairing my unit. Replaced what was necessary and cleaned up. Plus, they kept me in the loop the whole time. Very transparent, very fair, straight forward people. I highly recommend them—plus, they contacted me the next day after the job they did for us to make sure all was well!"
Dean P on August 2025
Allined Mechanical, we pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular project. We look forward to earning your business!
"Competent, professional, expert service. They did a very thorough, neat job in repairing my unit. Replaced what was necessary and cleaned up. Plus, they kept me in the loop the whole time. Very transparent, very fair, straight forward people. I highly recommend them—plus, they contacted me the next day after the job they did for us to make sure all was well!"
With over 10 years experience the HVAC industry, we are the experts you need to take care of your home or business. We handle everything from Central A/C to Gas Furnace installation. We will treat your home as we would treat our own. Give Absolute Zero Air Conditioning & Heating a call today, we look forward to working with you! Do not do Ductless Air Conditioning.
"Kyle was great. Followed up and performed work with his team"
Jake N on October 2025
With over 10 years experience the HVAC industry, we are the experts you need to take care of your home or business. We handle everything from Central A/C to Gas Furnace installation. We will treat your home as we would treat our own. Give Absolute Zero Air Conditioning & Heating a call today, we look forward to working with you! Do not do Ductless Air Conditioning.
"Kyle was great. Followed up and performed work with his team"
We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!
"Jeff was great. Showed up on time and gave a reasonable price. Would definitely consider hiring him again in the future!"
Gina C on January 2025
We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!
"Jeff was great. Showed up on time and gave a reasonable price. Would definitely consider hiring him again in the future!"
Welcome to Chortani Services HVAC. We have been servicing the Brooklyn area for more than 20 years. If there is ever a problem with your heating or air conditioning, we can take care of it. Over the years we have seen just about everything and fixed it all. We always ensure great communication on every project we undertake so that there are never any issues that can't be quickly taken care of. Contact us today for an estimate.
"I had a really positive experience with Chortani. I needed a central air conditioning system totally replaced and Mongi did a professional, clean, thorough installation. He came when he said he would come, and performed the job on time and in the given time frame. The one thing that I appreciated was his honesty and integrity in performing this replacement. I have to say, Chortani did a wonderful job and I am really pleased. I recommend Chortani 100%."
Pat B on November 2025
Welcome to Chortani Services HVAC. We have been servicing the Brooklyn area for more than 20 years. If there is ever a problem with your heating or air conditioning, we can take care of it. Over the years we have seen just about everything and fixed it all. We always ensure great communication on every project we undertake so that there are never any issues that can't be quickly taken care of. Contact us today for an estimate.
"I had a really positive experience with Chortani. I needed a central air conditioning system totally replaced and Mongi did a professional, clean, thorough installation. He came when he said he would come, and performed the job on time and in the given time frame. The one thing that I appreciated was his honesty and integrity in performing this replacement. I have to say, Chortani did a wonderful job and I am really pleased. I recommend Chortani 100%."
Pat B on November 2025
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Heating and Air Conditioning questions, answered by experts
You will only need to refill your AC with refrigerant if it has a leak. Otherwise, a modern, well-maintained AC will most likely never need a recharge. You may notice a leak in an older system if your bills are higher, you hear a hissing sound, or if the air is blowing out hot.
Assessing location for airflow, convenience, and minimal noise impact.
While spending money once or twice a year to tuneup your AC and furnace might seem like a waste of money, think again. The cost of HVAC maintenance is far less than the cost of replacing your furnace or AC unit, regardless of the type of HVAC system you have. Paying this smaller fee now will help you avoid paying much more significant costs in the future. Not to mention, having a serviced AC and heating system will help keep your home comfortable, no matter the season.
Most units are designed only to cool the house down to 20 degrees less than the temperature outside. This means that if it’s 99 degrees Fahrenheit out and you’re trying to cool your home down to 65 degrees, you’ll notice your AC is struggling.
Lower the blinds on all your windows, turn on your ceiling fans, and keep the thermostat at a consistent temperature to help your AC do its job. Investing in an HVAC maintenance plan also helps because pros will come out to inspect and tune up your unit regularly, keeping it in optimal working condition.
Whether an HVAC damper should be open or closed depends on the season, the zone it controls, and the temperature in that zone. In the summer, open upstairs dampers and close lower-level dampers to get the most efficient cooling possible. In the winter, do the opposite. Cool air will naturally flow down to lower levels, while warm air will rise. This keeps your system from working harder and helps prevent common AC problems.
The Coram, NY homeowners’ guide to heating and air conditioning services
From average costs to expert advice, get all the answers you need to get your job done.
Considering a heat pump to reduce monthly heating and cooling bills? Find out geothermal heat pump costs based on system type, capacity, and other factors.