At Absolute Mechanical Systems we have developed a program to keep your heating and cooling systems running at peak performance to save you money on your utility bills, to extend the life of your systems and most importantly to help prevent unwanted emergency calls.

Preventive Maintenance for your Heating and Cooling systems is very much like the regular maintenance you do for your car by changing the oil and filter. This type of maintenance for your heating and cooling systems should be done once in the winter for your heat and once in the spring for your air conditioning. Along with the equipment benefits our Preventive Maintenance customers receive a 10% discount on all parts and a $5/hour discount on labor.

Preventive Maintenance Plans

A/C Units: $120
Check A/C operation, blowers, belts, motors, bearings, capacitor, compressor, controls, refrigerant level, ID & OD coils, thermostat, change air filter.

Gas Furnace: $140
Includes: Check burners, flue, thermostat, heat exchangers, controls, flame safety, motors, bearings, change air filter.

Oil Furnace: $150
Check Burner, electrodes, ignition, thermostat, oil filter, controls, heat exchangers, high limit, flame safety, flue passages, replace nozzle, air filter, & combustion analysis.

Bypass type Humidifier: $50
Start & check operation in fall. Drain, clean & replace evaporator pad in the spring.

Gas Boiler: $150
Check gas valve, limits, gas pressure, flue, thermostat, burner, thermocouple, & pilot.

Oil Boilers: $160
Check Boiler, electrodes, ignition, thermostat, oil filter, controls, high limit, flame safety, clean flue passages, replace nozzle, & perform efficiency test.

Heat Pumps: $250
2 Visits, Check blowers, motors, bearings, capacitors, contractors, compressor, relays, refrigerant levels, elec. heat elements, defrost, thermostat, & change filter.

Serving Southern New Hampshire and parts of Massachusetts

Our Happy Customers

Don’t take our word for it, here’s what our clients have said about Absolute Mechanical Systems

Write a Review

We were so pleased with the service and attention to detail. The staff and installers were amazing.

J. Faucher

Outstanding service second to none. Quick response, and never a hassle. They do quality work at a better than fair price. Highly recommend for heating and ac needs.

D. Gorgolione

Without question, the very best experience I’ve ever had with any specialty service business. If you live anywhere near Brookline and are in need of these types of services, I strongly recommend going to Absolute first.

S. Huffman

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Special Offers

If you're looking for more value from your HVAC contractor, Absolute Mechanical Systems will deliver it. Browse our current specials and see how you can save.

More Special Offers

With new installation of Furnace & AC you get TWO FREE items below:

Whole house air cleaner
Humidifier
Programmable Thermostat
Wifi Thermostat


(603) 249-9800

Not valid with other offers or prior services.

With new installation of Furnace you get ONE FREE item below:

Whole house air cleaner
Humidifier
Programmable Thermostat
Wifi Thermostat


(603) 249-9800

Not valid with other offers or prior services.

Complete Residential & Light Commercial HVAC Services