HVAC, Plumbing & Electrical
in Merrimack, NH
A.J. LeBlanc Heating has served Merrimack and Southern NH since 1928. Licensed technicians, honest estimates, and 24/7 emergency service.
We Know
Merrimack Homes.
Merrimack grew fast in the 60s through the 80s and the housing stock reflects it. A lot of ranches and split-levels that are now hitting that age where the original mechanical systems need to come out.
Housing: Ranch homes and split-levels from the 60s through 80s make up a big chunk of the town. There are some newer colonials in more recent developments, but the bulk of Merrimack's housing was built during its main growth period and is 40 to 60 years old.
Heating: Oil heat is still very common here. A lot of these homes are at the point where the original furnace or boiler has been patched and repaired for years and the homeowner is finally ready to replace it properly. We do a lot of that work in Merrimack.
Cooling: The ranch-style homes here were not built with central air in mind. Mini splits fit well in them because you are not trying to run ductwork through a house that has nowhere to put it.
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.
We see Merrimack as a town full of homes at exactly the right age for a full mechanical upgrade. Not falling apart, but ready for something better. We help homeowners figure out what makes the most sense.
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
"Impressed by quality of work by the technicians and the way they co-operated with one another."
"Work performed was top notch. They were very conscientious and cleaned up when work was done."
"Excellent service from a professional HVAC organization. I would highly recommend A.J. LeBlanc Heating for all HVAC needs!"
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 is still very common here. A lot of these homes are at the point where the original furnace or boiler has been patched and repaired for years and the homeowner is finally ready to replace it properly. We do a lot of that work in Merrimack. 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.
Schedule Online in 60 Seconds
Pick a date and time that works for you. Service, maintenance, or estimate visits, no phone tag.
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.