HVAC, Plumbing & Electrical
in Londonderry, NH
A.J. LeBlanc Heating serves Londonderry and Southern New Hampshire. Family-owned since 1928, our EPA-certified HVAC technicians, licensed plumbers, licensed electricians, and water-treatment specialists provide honest estimates and 24/7 emergency service.
Complete Home Services
for Londonderry Homeowners
Our in-house heating, cooling, plumbing, and electrical teams work together under one roof. Homeowners get one company to coordinate the job and one clear point of contact from start to finish.
Heating
We install, repair, and maintain furnaces, boilers, and heat pumps in Londonderry, with 24/7 emergency service available.
Heating ServicesAir Conditioning
We install and service central A/C and ductless mini split systems in Londonderry. Our team has installed thousands of ductless systems across Southern NH.
A/C ServicesPlumbing
Our licensed plumbers handle water heaters, drains, fixtures, water-supply piping, and residential plumbing repairs in Londonderry homes.
Plumbing ServicesElectrical
Our licensed New Hampshire electricians handle panel upgrades, standby generators, EV chargers, and electrical repairs for Londonderry homeowners.
Electrical Services
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.
Furnaces, Boilers &
Heat Pumps
Heating 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.
Heating Services We Provide
We take care of all heating equipment in Londonderry. From routine annual service to emergency repairs and full system replacements, our team is ready to help.
- 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
Cooling in Londonderry
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.
Cooling Services We Provide
From central air conditioning to heat pumps and ductless mini splits, we handle cooling installation and service in Londonderry. We have completed thousands of ductless installations across Southern NH. Call us for a quick response to a summer breakdown or full system replacement.
- Central A/C Installation
- Ductless Mini Split Systems
- Heat Pump Installation
- A/C Repair & Tune-Up
- Indoor Air Quality
Filtration, Softeners
& Testing
Water Treatment in Londonderry
Londonderry has a neighborhood-by-neighborhood mix of public water and private wells. Public-water extensions were part of the response to PFAS (per- and polyfluoroalkyl substances) in the Saint-Gobain area. A separate response near the Tinkham Garage Superfund site addressed solvents and other volatile organic compounds in specific wells.
The documented response areas do not describe every Londonderry property. For a private well, A.J. LeBlanc Heating collects the water sample for independent laboratory analysis and follows the current results and any location-specific state guidance. Treatment may include sediment, iron, manganese, hardness, or ultraviolet equipment, while PFAS or volatile-organic-compound results require contaminant-specific systems with verified performance.
Public-water customers may choose whole-house activated carbon for better taste or a dedicated carbon or reverse osmosis system for drinking and cooking water.
Water Treatment Services We Provide
We install and service water-treatment systems throughout Londonderry. When testing is needed, we send a water sample to an independent laboratory and use the results to select and size the appropriate equipment.
- Well Water Filtration
- Water Softeners
- Iron & Manganese Removal
- Reverse Osmosis Drinking Water
- UV Purification
- Water Sampling & Independent Laboratory Testing
Water Heaters, Drains
& Fixtures
Plumbing in Londonderry
Londonderry's older rural homes, established neighborhoods, condominiums, and later subdivisions contain very different plumbing layouts. A.J. LeBlanc Heating repairs leaking faucets and pipes, running toilets, failed shutoff valves, fixture connections, slow drains, and water heaters. We also service well tanks and pressure switches in homes with private wells.
Whether the problem is isolated to one fixture or affects a larger section of the home, we trace it to the plumbing component that needs attention and explain the options clearly.
Plumbing Services We Provide
We provide residential plumbing service throughout Londonderry, including fixture repairs, water heaters, household drains, water-supply piping, well tanks, pressure switches, and related controls. We respond quickly and explain the work clearly.
- Water Heater Installation
- Well Tanks, Pressure Switches & Controls
- Drain Cleaning
- Faucet & Fixture Installation
- Household Water-Supply & Drain Piping
- Repairs & Service
Panels, Generators
& EV Chargers
Electrical in Londonderry
You can turn to the same trusted company for heating, cooling, and electrical work in Londonderry. Our New Hampshire electricians are licensed to do the job properly.
Electrical Services We Provide
Our electrical services include panel upgrades, standby generators, and EV charger installations. We provide a quick response and do the work to code.
- Electrical Panel Upgrades
- Standby Generator Installation
- EV Charger Installation
- Lighting, Outlets & Switches
- Electrical Repair & Service
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 A.J. LeBlanc HVAC technician holds EPA Section 608 certification and a separate New Hampshire fuel gas fitter license. Our plumbers and electricians are New Hampshire master or journeyman licensed in their trade. A.J. LeBlanc Heating is ACCA QA Certified.
Not Commission-Based
Our technicians are not paid sales commission. Their recommendations stay focused on what the home needs.
24/7 Emergency Response
No heat at 2am? We answer the phone every day of the year, including holidays.
What Southern NH
Homeowners Say
"Great work. Completed on schedule."
"Great work, very happy!"
"A.J. Leblanc Heating always does a great job."
HVAC, Plumbing & Water 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 appointments for emergencies when scheduling allows. 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 service in Londonderry. Call 603-623-0412 any time, day or night, including weekends and holidays.
Are there heating or cooling rebates available in Londonderry?
Londonderry homeowners may qualify for NHSaves rebates through Eversource, Liberty Utilities, New Hampshire Electric Cooperative, or Unitil. Additional New England Heat Pump Accelerator incentives may apply to qualifying equipment. Program rules and funding can change, so we confirm the current options when preparing the 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?
Heating systems vary from one Londonderry home to another. We service boilers, furnaces, heat pumps, and other common systems. After inspecting the home, we explain the repair or replacement options clearly.
Do I need water treatment in Londonderry?
It depends on your water source and your goals. For a private well, we collect a sample and send it to an independent laboratory. We use the results to recommend treatment only when the water calls for it. For public water, we review the utility report and investigate the condition at the tap before recommending additional equipment.
What water treatment systems do you install in Londonderry?
We install water softeners, iron and manganese filters, sediment filters, activated-carbon filters, whole-house ultraviolet systems, arsenic-treatment systems, and under-sink reverse osmosis. Equipment is selected and sized from independent laboratory results, the public-water report, and the homeowner's specific goal. For radon in well water, we can provide contact information for an independent mitigation company.
What plumbing services do you offer in Londonderry?
We handle water heaters, drain cleaning, faucet and fixture installation, leak and pipe repair, shutoff valves, and water-supply and drain piping throughout the home. If the home uses a private well, we also service the well tank, pressure switch, and related controls. We complete selected exterior piping as well, including irrigation and accessory-dwelling-unit connections.
Do you install and replace water heaters in Londonderry?
Yes. We install and replace natural gas, propane, oil, and electric water heaters, plus heat-pump water heaters. We help you choose the right size and fuel for your home and install it to code.
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.