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 quickly during the 90s and 2000s and it shows. Most of the housing stock is from that era, which means a lot of it is now 20 to 30 years old and the original equipment is starting to age.
Housing: Colonials and contemporaries built in the 90s and 2000s make up most of the town. There are still some older properties along the rural roads, but Londonderry is largely a product of the tech boom growth that hit this corridor hard.
Heating: A lot of these homes were built with gas heat and central air already included, which is a bit different from older NH communities. That said, there are still plenty of oil systems in the earlier developments from the 70s and 80s.
Cooling: Central A/C is common in Londonderry because builders were including it from the start in most of the 90s-and-newer construction. We still do a lot of mini split work here for homeowners who want zone control or more efficiency out of what they have.
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.
We do a lot of system replacements in Londonderry. The 90s-era equipment is aging out and homeowners are figuring out their options. We walk them through it honestly.
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
"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."
"Robert the chief HVAC technician is very knowledgeable and a superb installer - A.J. LeBlanc Heating is very accessible for routine as well as emergency issues."
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?
A lot of these homes were built with gas heat and central air already included, which is a bit different from older NH communities. That said, there are still plenty of oil systems in the earlier developments from the 70s and 80s. 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.