HVAC, Plumbing & Electrical
in Merrimack, NH
A.J. LeBlanc Heating serves Merrimack and Southern NH, family-owned since 1928. Licensed technicians, honest estimates, and 24/7 emergency service.
We Know
Merrimack Homes.
Merrimack grew from fewer than 3,000 residents in 1960 to more than 22,000 by 1990. That growth is still visible in its ranches, split-levels, later colonials, and the several generations of home systems A.J. LeBlanc Heating services throughout town.
Housing: About 84 percent of Merrimack's housing units are single-family homes, and roughly 89 percent are owner-occupied. Much of the housing was built during the 1970s and 1980s, putting the median year near 1985. Ranches and split-levels are common in those established neighborhoods, while developments from the 1990s and later include more colonials. The town's growth pattern means many homes are now evaluating replacements for original or earlier-generation heating and cooling equipment.
Heating: Oil heat remains common in Merrimack, particularly in the ranches and split-levels built during the town's major growth decades. Liberty Utilities operates natural gas service in parts of town along the Route 3, Daniel Webster Highway, corridor, allowing A.J. LeBlanc Heating to complete gas equipment replacements and oil-to-gas conversions where service is available. Other homes use propane or are candidates for cold-climate heat pumps. We check the home's heating needs, existing distribution system, utility-room space, and available fuel options before recommending a furnace, boiler, or heat-pump replacement.
Cooling: Many of Merrimack's 1970s and 1980s ranches and split-levels were built without central air-conditioning ducts. A mini split system can add cooling to those homes and can also serve additions or bonus rooms that the original system does not reach well. Colonials built during the 1990s and 2000s often have forced-air ductwork that can carry central A/C or a ducted heat pump after we verify airflow and capacity. A.J. LeBlanc Heating evaluates the layout, ducts, airflow, and electrical capacity before designing the system.
Complete Home Services
for Merrimack Homeowners
One call covers everything. Our licensed teams handle heating, cooling, plumbing, and electrical so you don't have to coordinate between separate companies for each trade.
Heating
Furnace, boiler, and heat pump installation and repair in Merrimack. Annual maintenance and 24/7 emergency response.
Heating ServicesAir Conditioning
Central A/C and ductless mini-split installation and service in Merrimack. We've installed thousands of ductless systems across Southern NH.
A/C ServicesPlumbing
Kitchen and bath remodeling, water heaters, drains, and full plumbing service for Merrimack homes.
Plumbing ServicesElectrical
Panel upgrades, generators, EV chargers, and electrical repair for Merrimack homeowners. Licensed NH electricians.
Electrical Services
Furnaces, Boilers &
Heat Pumps
We install and service all heating equipment in Merrimack. From emergency repairs to annual service to full system replacements, we respond quickly.
- Gas & Oil Furnace Installation
- Boiler Installation & Repair
- Heat Pump Installation
- Water Heater Replacement
- Annual Heating Maintenance
- 24/7 Emergency Heating Service
Air Conditioning &
Mini Split Installation
A.J. LeBlanc Heating has installed thousands of ductless systems across Southern NH. We help Merrimack homeowners choose the right cooling solution for their home and budget.
- Central A/C Installation
- Ductless Mini Split Systems
- Heat Pump Installation
- A/C Repair & Tune-Up
- Indoor Air Quality
Local to Merrimack.
Trusted Since 1928.
A.J. LeBlanc Heating works throughout Reeds Ferry, Thorntons Ferry, Souhegan Village, and South Merrimack. We help homeowners replace aging oil boilers and furnaces, consider a gas conversion where service is available, and add central or ductless cooling based on the home's layout. Our family-owned company has served New Hampshire since 1928, and our HVAC, plumbing, electrical, and water-treatment teams can coordinate the work when a project crosses trades.
Based in Bedford, about 15 minutes from Merrimack
Our shop is on South River Road in Bedford. We know the roads and we respond quickly.
Licensed, Insured & Background-Checked
Every HVAC technician is EPA certified and NH gas-licensed. Our plumbers and electricians are NH master or journeyman licensed in their trade. A.J. LeBlanc Heating is ACCA QA Certified.
Not Commission-Based
Our techs earn the same no matter what they recommend. You always get an honest answer.
24/7 Emergency Response
No heat at 2am? We answer the phone every day of the year, including holidays.
What Southern NH
Homeowners Say
"The technicians/installers were knowledgeable, polite, and efficient. We have no complaints with the crew members who come to the house. One opportunity for improvement is in response time to calls. Sometimes we wait a few days and have to call again to get a call back for non-emergency situations."
"Super sales-rep, office staff and the technicians cleaned up everything and were very accommodating with questions, install timing etc."
"Great work, very happy!"
HVAC & Plumbing FAQ
for Merrimack, NH
Do you service Merrimack, NH?
Yes. Merrimack is one of our core service areas. We provide heating, air conditioning, plumbing, and electrical services throughout Merrimack and the surrounding Hillsborough County area. Call 603-623-0412 for a free estimate.
How quickly can you respond in Merrimack?
Our Bedford headquarters is about 15 minutes from Merrimack. We typically schedule service within 1-2 business days, with same-day availability for emergencies. For urgent heating or cooling issues, call us directly at 603-623-0412.
Do you offer emergency service in Merrimack?
Yes. We provide 24/7 emergency HVAC service in Merrimack for all existing customers. No heat or hot water? Call 603-623-0412 any time, day or night, weekends and holidays included.
Are there heating or cooling rebates available in Merrimack?
Merrimack homeowners may qualify for NHSaves rebates through Eversource, Unitil, or Liberty Utilities, plus NEHPA rebates on qualifying cold-climate heat pumps. We'll help you identify every rebate that applies to your home and equipment. Just ask when you call for your estimate.
Do you handle both HVAC and plumbing?
Yes. We handle heating, cooling, plumbing, and electrical all under one roof. That means one call, one relationship, and one company familiar with your whole home. No coordinating between multiple vendors or schedules.
What heating systems are common in Merrimack?
Oil heat remains common in Merrimack, particularly in the ranches and split-levels built during the town's major growth decades. Liberty Utilities operates natural gas service in parts of town along the Route 3, Daniel Webster Highway, corridor, allowing A.J. LeBlanc Heating to complete gas equipment replacements and oil-to-gas conversions where service is available. Other homes use propane or are candidates for cold-climate heat pumps. We check the home's heating needs, existing distribution system, utility-room space, and available fuel options before recommending a furnace, boiler, or heat-pump replacement. Whatever system you have, we service it. If it's time to replace, we'll walk you through all the options honestly.
Also Serving Towns Near Merrimack
Get in Touch
Fill out the form and we'll get back to you. Usually the same business day. For emergencies, call us directly.
Contact Information
Mon-Fri: 8am-4:30pm
Evenings & Weekends: Emergency Service
24/7 Emergency Service
No heat? No hot water? Call 603-623-0412 any time.