HVAC, Plumbing & Electrical
in Londonderry, NH
A.J. LeBlanc Heating serves Londonderry and Southern NH, family-owned since 1928. Licensed technicians, honest estimates, and 24/7 emergency service.
We Know
Londonderry Homes.
Londonderry grew rapidly after Interstate 93 improved access to the region, and much of its housing dates to that suburban expansion. A.J. LeBlanc Heating serves the town's established core, later subdivisions, and older homes along its rural roads.
Housing: About 80 percent of Londonderry's housing units are single-family homes, with building activity peaking during the 1970s and 1980s. Those neighborhoods include many colonials and capes, while subdivisions from the 1990s and 2000s added newer colonials and contemporary homes. Condominiums and other multi-family housing account for roughly 17 percent of the units, and older houses remain along the town's rural roads. The median home dates to the mid-1980s.
Heating: Liberty Utilities provides natural gas in parts of Londonderry, particularly near the I-93 corridor and in some newer developments, with availability confirmed for the address. Older neighborhoods and rural roads continue to include many oil- and propane-heated homes. A.J. LeBlanc Heating replaces furnaces and boilers across all three fuels and can complete an oil-to-gas conversion where utility service is available. We also install cold-climate heat pumps and help homeowners compare those options against keeping their current fuel.
Cooling: Many Londonderry homes built during the 1990s and later were equipped with forced-air ductwork. When older cooling equipment wears out, central A/C or a ducted heat pump may be a natural replacement. Earlier homes may have boiler heat and no usable ducts. In those houses, a mini split system can add room-by-room cooling without a major duct installation. A.J. LeBlanc Heating evaluates the existing system and home layout before recommending central or ductless equipment.
Complete Home Services
for Londonderry 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 Londonderry. Annual maintenance and 24/7 emergency response.
Heating ServicesAir Conditioning
Central A/C and ductless mini-split installation and service in Londonderry. 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 Londonderry homes.
Plumbing ServicesElectrical
Panel upgrades, generators, EV chargers, and electrical repair for Londonderry homeowners. Licensed NH electricians.
Electrical Services
Furnaces, Boilers &
Heat Pumps
We install and service all heating equipment in Londonderry. 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 Londonderry 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 Londonderry.
Trusted Since 1928.
A.J. LeBlanc Heating helps Londonderry homeowners plan replacements for equipment installed during the town's major growth decades. Depending on the home, the right answer may be another furnace or boiler, an oil-to-gas conversion where service is available, or a cold-climate heat pump. Our family-owned team has served New Hampshire since 1928 and provides the HVAC, plumbing, electrical, and water-treatment support needed to complete the work properly.
Based in Bedford, about 15 minutes from Londonderry
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
"Honest and reliable service. Always satisfied."
"We appreciate the hard work and customer care that A.J. Leblanc's provided. Thank you!"
"Great job from start to finish!"
HVAC & Plumbing FAQ
for Londonderry, NH
Do you service Londonderry, NH?
Yes. Londonderry is one of our core service areas. We provide heating, air conditioning, plumbing, and electrical services throughout Londonderry and the surrounding Rockingham County area. Call 603-623-0412 for a free estimate.
How quickly can you respond in Londonderry?
Our Bedford headquarters is about 15 minutes from Londonderry. 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 Londonderry?
Yes. We provide 24/7 emergency HVAC service in Londonderry 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 Londonderry?
Londonderry 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 Londonderry?
Liberty Utilities provides natural gas in parts of Londonderry, particularly near the I-93 corridor and in some newer developments, with availability confirmed for the address. Older neighborhoods and rural roads continue to include many oil- and propane-heated homes. A.J. LeBlanc Heating replaces furnaces and boilers across all three fuels and can complete an oil-to-gas conversion where utility service is available. We also install cold-climate heat pumps and help homeowners compare those options against keeping their current fuel. 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 Londonderry
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.