As an authorized MRCOOL installer, Milton's Construction brings efficient ductless heating and cooling to Brentwood homes — old houses, new additions, in-law suites.
Most of Brentwood's older Capes and ranches were built with baseboard electric heat or forced hot air — neither of which handles cooling well, and neither of which extends cleanly into a new addition or in-law suite. Installing a traditional ducted HVAC system in a home with no existing ductwork is an enormously disruptive and expensive project. A MRCOOL ductless mini-split system is a direct answer to that problem: it heats and cools with DC inverter efficiency, it requires only a small penetration through an exterior wall, and it can be zoned room by room.
Milton's Construction is an authorized MRCOOL distributor and installer. We size and install single-zone and multi-zone mini-split systems and carry the job through the Town of Islip mechanical permit and inspection process. For Brentwood homeowners who just built an addition, finished a basement, or converted a room to an in-law suite, a properly sized MRCOOL system is often the right call — a dedicated zone that doesn't stress the existing heating system and can be controlled independently.
A Brentwood Cape Cod with baseboard heat and window air conditioners is a perfect candidate for a MRCOOL ductless system. You get heating down to very low outdoor temperatures, genuine cooling, and energy efficiency that baseboard electric can't match — without tearing into ceilings and walls to run ductwork. The installation footprint is minimal: an indoor air handler mounted high on a wall, a short refrigerant line set through the exterior wall, and an outdoor condenser unit.
For additions and in-law suites, a separate mini-split zone is almost always the cleanest solution. It gives the occupant independent temperature control, avoids overloading the existing system with additional square footage, and avoids running ductwork through a new framed space where you'd rather have insulation and clean wall cavities.
MRCOOL DC inverter heat pumps are rated for heating performance well below freezing, which makes them genuinely useful as a primary heat source on Long Island — not just a supplement. Suffolk County winters are cold enough that older mini-split technology struggled below 20 degrees Fahrenheit, but current MRCOOL systems hold their rated output considerably lower than that. Many Brentwood homeowners use them as their primary system in an addition and keep the existing baseboard as emergency backup.
We size every system based on the actual square footage, ceiling height, insulation level, and window exposure of the space — not a rule of thumb. An undersized system that runs constantly is expensive to operate and shortens equipment life. Call or text 631-741-0199 to schedule a free written estimate.
Yes. Mechanical equipment installations, including mini-split systems, require a mechanical permit through the Town of Islip Building Division. Electrical work associated with the installation also requires an electrical permit. We file both, schedule the inspections, and have the final sign-off in hand before we consider the job complete.
Yes, provided it's sized correctly for the space and the building envelope is reasonably well insulated. MRCOOL's DC inverter technology maintains effective heating output at low outdoor temperatures. For a new in-law suite addition in Brentwood, a properly sized mini-split is typically the best combination of efficiency, cost, and independent zone control.
It's one of the best fits available. Retrofitting central ducted HVAC into a Cape Cod without existing ductwork means cutting soffits, building bulkheads, or using high-velocity systems — all of which add cost and visual disruption. A ductless mini-split avoids all of that. One small penetration per zone, no ductwork, and you get both heating and cooling with a single system. We do this installation regularly in Brentwood.
Get a free, no-obligation estimate for your project today.
