Learn everything you need to know about your heating or air conditioning system. Can't find what you're looking for? Contact us and we'll be more than happy to help you!


Why do Preventative Maintenance on your HVAC system?

Weather it be on a cold blustery day or a day in the heat of summer -  a system failure will ruin your day.  Planned service keeps your system in great shape and helps prevent unwanted emergency service calls.  A properly maintained system will last longer and save you money on your energy bills.
Do you change the oil in your car regularly?  If you don't you will notice immediately that the car is not running well ,but, over time, without maintenance the engine will eventually quit.  The same is true with your heating and cooling systems.  If you do not do regular maintenance, you may not notice right away, but it will catch up with you in the long run.
Preventative Maintenance should be done each time your system is started up for the season - once per year for the heating system and once per year for the air conditioning system.  Callahan AC & Heating Services specializes in helping homeowners get the best performance possible by performing a thorough inspection and tune-up on your system.  Preventive Maintenance Works!   Call us today at 978-689-9233 for pricing and to schedule your Preventive Maintenance.


How do I know if I have a furnace or a boiler?

The difference between a furnace and a boiler is that a furnace heats air and blows it through heat ducts to the registers or grilles in the home. A boiler heats water, and the water is circulated through pipes to radiators or baseboards.


My pilot light is on , but my furnace is not operating - what should I do?

First, check for power, check fuses and/or ON-OFF switch. Next, check thermostat for proper setting. If none of these approaches work call a certified service technician.


Why is my furnace so noisy?

It could be a worn fan belt, bad bearings or bearings in need of lubrication.


My allergies seem to bother me a lot at home. What can I do?

At least, change your air filters. You might also consider having your air ducts cleaned. Much of the dust, mites and other debris that build up in the air ducts are circulated into the air of your home.


What are the benefits of an air filtration system?

An Air Filtration system removes dust, pollen, spores and smoke. It can also reduce the cost of Furnace and Air Conditioner maintenance.


What financing is available?

You can choose from a variety of ways to pay for your new heating/cooling system.Check, Visa and Mastercard are accepted. If you need more flexibility, you may select from one of our financing programs - Call or Click for more information.


I have a boiler what are my options for air conditioning my home?

A. Ductless air conditioning is often referred to as a mini split. It is a cost-effective way to control indoor climate without adding ductwork. A wall unit is hung and the condenser is installed outside the building, ensuring quiet operation inside. A remotely wired or hand-held controller provides flexible operation relating to time programs, room temperatures and more.

B. High-velocity air systems distributes air through flexible, pre-insulated 2" tubing which slides through wall structures and around obstructions. All you see is a small, round, air outlet located on ceilings, walls, or floors. The outlets can be easily painted or wallpapered.

C. Conventional ducted cool air systems in many cases can be added by dropping through ceiling and closets without causing major renovation problems.C. Conventional ducted cool air systems in many cases can be added by dropping through ceiling and closets without causing major renovation problems.