HVAC, Plumbing & Electrical in Londonderry, NH

An orchard town growing fast, with its water still catching up

Londonderry made its name on apple orchards. The Apple Way, a designated New Hampshire scenic and cultural byway, still winds past working farms like Mack's Apples, a National Bicentennial Farm founded in 1732, and for decades this was a quiet bedroom community sitting between Manchester and Derry. That has changed fast. Former orchard land now carries projects like the 603-acre Woodmont Commons off I-93, and Londonderry has become one of southern New Hampshire's fastest-growing towns. Most of its housing, old and new, sits on private wells rather than a municipal main, and that single fact shapes almost everything about keeping a home here running. It starts underground, with the water.

Your well water is the first system to get right

Nearly half of New Hampshire homes draw from a private well, and much of Londonderry does too. That water is your responsibility, not a utility's, and in this town it carries real risk. PFAS from the regional Saint-Gobain plume reached private wells in parts of Londonderry, including the High Range Road area, serious enough that the state funded an 11 million dollar extension to tie affected homes into public water. Beyond PFAS, New Hampshire's bedrock adds its own chemistry: state estimates put roughly one in five private wells over the arsenic limit and close to a quarter of bedrock wells high in radon, none of which you can see, taste, or smell. We test for the full panel, not just one contaminant, then install the right treatment - point-of-entry filtration that removes PFAS, arsenic reduction, radon-in-water aeration - and retest to prove the numbers landed in range. Guessing is not an option when the contaminant is invisible.

Hard water is quietly wearing out everything it touches

Londonderry's water runs hard, and private wells tend to run harder than the town supply. Hard water is loaded with calcium and magnesium that drop out as scale inside your water heater, your fixtures, and every appliance that heats or moves water. Scale coats a water heater's surfaces so it burns more energy for less hot water and fails early, it clogs faucets and shower heads, and it shortens the life of dishwashers and washing machines. We size and install a water softener matched to your actual hardness, pair it with the filtration your well needs, and protect the equipment you have already paid for. On a well, treating the water is not a luxury - it is what keeps the rest of your plumbing from aging twice as fast.

Real winters, humid summers, and no coast to worry about

Londonderry sits inland, so there is no salt air chewing at your outdoor equipment the way there is on the seacoast. The winters, though, are the real thing, and the summers are humid. Heating has to be sized for a genuine New Hampshire cold snap, not a mild one, and a properly sized cold-climate heat pump is a strong fit here, delivering efficient heating and cooling from one system with backup heat for the coldest nights. Sizing is where it is won or lost. An oversized air conditioner cools the house quickly but never runs long enough to pull the humidity out, leaving rooms clammy and prone to mold in July. We run a real heat-load calculation, size to it, and set up the dehumidification so the system holds both temperature and comfort through both seasons.

When the power goes out on a well, so does your water

Southern New Hampshire storms and ice take the grid down for hours or days, and here that is not just a lighting problem. A private well runs on an electric pump, so when the power drops you lose water for drinking, flushing, and your heating system at the same time the temperature is falling. A whole-home standby generator solves all of it at once, starting automatically and keeping the well pump, the heat, the refrigerator, and the sump running until the utility returns. We size the generator to the real load of the house and wire it in properly, and for the homes that need it we add the freeze protection - insulation, heat trace, and rerouting of vulnerable lines - that keeps pipes from bursting during the same cold snap that knocked the power out.

Old farmhouses and new builds, side by side

Londonderry's housing runs the full range, from antique farmhouses along the orchard roads to subdivisions going up on former farmland. The older homes often still carry knob-and-tube wiring, undersized electrical panels, and galvanized or cast-iron supply lines near the end of their lives, all built for a fraction of today's electrical demand. The newer and renovated homes push the other way, adding finished basements, EV chargers, pools, and heat pumps that a service panel has to be sized to carry. We upgrade panels to 200 amps, replace knob-and-tube wiring and old plumbing lines, and make sure the electrical capacity matches how the house is actually used now instead of how it was wired decades ago.

One call instead of five

The well filtration, the softener, the heat pump, the generator, the panel upgrade, and the water heater are one licensed, veteran-owned team out of our Manchester branch minutes up the road, not five contractors to line up and coordinate. Same-day where we can, permits pulled, and a lifetime workmanship guarantee standing behind all of it.

What we get called for in Londonderry

The work that comes up most around here. Same team, same guarantee, whichever one you need.

• Water Treatment - Cleaner, safer water for your whole home.
• Generator Install - Keep your home powered no matter what.
• Boiler Repair - Restore heat fast with reliable service.
• Heat Pumps - Repair or replace modern heat pumps.
• Furnace Repair - Restore heat fast with reliable service.
• Panel Upgrades - Boost home power and improve safety.
• Oil-to-Gas Conversion - Upgrade your home to use modern, efficient fuel.
• Water Heaters - Repair or replace tank and tankless units.

We also serve near Londonderry

Same team, same guarantee, a short drive away. Find your town for the local details.

• Derry, NH
• Litchfield, NH
• Windham, NH
• Merrimack, NH
• Hudson, NH
• Nashua, NH