Aces Highlands heat pump installation in progress: vacuum pump and refrigerant gauges connected to an outdoor unit on a brick home

HVAC, Plumbing & Electrical in Windham, Maine

Windham, Cumberland County

Your Local Home Service Team in Windham

Windham's growing community deserves reliable home comfort services. Aces Highlands provides expert heat pump installation, boiler repair, and plumbing services throughout Windham — from North Windham to the Sebago Lake area.

New construction in Windham benefits from energy-efficient HVAC design. We install complete cold-climate heat pump systems with proper load calculations and electrical infrastructure to support them.

Windham homeowners can take advantage of our current coupons and discounts. Get in touch for a free estimate.

Why Choose Us for Windham

Local team based at 508 Riverside St Unit 1 in Portland — minutes from Windham
Honest diagnostics and transparent pricing — no upselling
Same-week scheduling for most service calls
Licensed, insured, and reviewed by real customers on Google

Getting to Know Windham

Windham was settled as New Marblehead — granted in 1734 to families from Marblehead, Massachusetts — and incorporated under its current name in 1762. The town sits beside Sebago Lake, the deepest lake in New England at 316 feet, which supplies drinking water to the Greater Portland region — roughly one in five Mainers.

Windham is one of the fastest-growing corners of the Lakes Region, and its mix of new construction and older lake-area homes keeps our installers busy with everything from full heat pump systems to seasonal camp conversions.

Windham Homes and What They Need

Windham is the largest town of these five, with about 19,000 residents, and its housing reflects decades of steady growth. Census estimates put the median home at 1985; about 42 percent of homes predate 1980 and about 12 percent predate 1940, much of it in the old villages of South Windham, Windham Center and Windham Hill, while about 12 percent have been built since 2010. Roughly one in eleven housing units is held for seasonal or occasional use, clustered on the shores of Sebago Lake, Little Sebago Lake and Highland Lake, and the town's own planning documents note that many former camps are now year-round homes reached by old gravel roads. Those conversions are where the problems concentrate: uninsulated crawlspaces, supply lines run for summer use, undersized wiring and heat added room by room. Ductless mini-splits suit converted camps because they need no ductwork.

Heating and Cooling in Windham

Windham relies heavily on delivered fuel. Census estimates show fuel oil or kerosene in about 58 percent of occupied homes and bottled propane in about 21 percent, with electricity at about 10 percent and wood at about 5 percent. Maine Natural Gas is authorized to serve Windham, but utility gas reaches only about 4 percent of homes, mostly near its lines, so most households are buying oil or propane by the delivery. Being inland and away from the ocean's moderating effect, Windham sees colder winter nights than coastal Falmouth or Cape Elizabeth, and exposed lakefront homes take the wind off open water. That is a strong case for cold-climate heat pumps rated for sustained output well below zero, with the existing boiler or furnace kept for the coldest stretches; the same units cover summer cooling in homes that never had central air.

Water Supply and Drains in Windham

The Portland Water District supplies public water in parts of Windham, but for sewage the town has long relied on individual septic systems, for homes and businesses alike, and many houses outside the mains draw from private wells. That is changing in North Windham: a new treatment plant near Manchester School, using membrane bioreactor treatment with drip dispersal, began operating on August 19, 2026. The town built it because nitrate levels in the North Windham aquifer, fed by septic discharges, exceeded drinking water standards and threatened Sebago Lake. Businesses around the Route 302 corridor were connected first, and residential connections are expected to follow, with owners signing connection applications and access agreements. For a house on the new line, the plumbing work of a sewer hookup means abandoning the septic tank correctly and running a sound lateral to the main.

Power, Storms and Wiring in Windham

Central Maine Power serves Windham, and the town sits squarely in the path of Maine's worst outages. In the January 1998 ice storm Windham was named among the Greater Portland towns that bore the brunt of the damage, and the December 2023 wind and rain storm left more than 56,000 Cumberland County customers in the dark at its peak. Wooded lake roads and long rural lines make restoration slower than in denser towns. Commuting is the other pattern: census estimates show about half of Windham commuters travel 30 minutes or more, much of it along Route 302 toward the Portland area, which is the kind of daily mileage where an electric vehicle charged at home pays off. For houses on wells, an outage also means no water, which is why a standby generator sized for the well pump is common here.

Local & Independent — Not a Franchise

Aces Highlands is a locally owned Portland, Maine company serving Windham — not a national franchise. Our technicians are not commissioned salespeople and nobody here is required to upsell you anything. We do the work you called us for, do it right, and earn the next call. That is the whole business model.

REQUEST SERVICE CALL (207) 670-8616