MRCOOL ductless mini-split installation in Holbrook, NY — authorized installer, older homes and additions welcome.
A large share of Holbrook's 1960s and 1970s ranches and hi-ranches were built with oil or gas baseboard heat and no ductwork — which means central air conditioning either never existed or was bolted on years later with window units that don't cover every room. MRCOOL ductless mini-split systems solve this cleanly: no ductwork required, efficient heating and cooling in every room or zone you choose, and a system that can be installed without tearing up walls.
Milton's Construction is an authorized MRCOOL installer. We size and install ductless mini-splits and heat pump systems for Holbrook homes — existing houses, new additions, converted basements, and in-law suites. One crew, one contract. Licensed and insured in New York. Free written estimates at 631-741-0199.
Holbrook ranches without central air are exactly what MRCOOL mini-splits were designed for. A multi-zone system lets us put an air handler in each bedroom and in the main living area, connected to a single outdoor compressor. Each zone has its own thermostat, so nobody's arguing over the temperature. Heating and cooling in the same unit means you can run the baseboard heat less — or not at all in milder months.
Installation in a finished home is minimally invasive. The refrigerant lines and electrical run through a small penetration in the exterior wall, and the interior air handlers mount high on the wall. We handle the electrical connection and the Town of Islip permit for the installation. Most jobs are done in a day or two.
When we build a second-story addition or a rear extension on a Holbrook home, extending the existing HVAC system to the new space is often impractical — the existing equipment wasn't sized for it, and running new ducts through a finished first floor is disruptive and expensive. A dedicated MRCOOL mini-split for the addition solves the problem cleanly and keeps the new space independently comfortable.
In-law suites especially benefit from a dedicated unit. The occupant controls their own temperature without affecting the rest of the house, and the system runs on its own circuit. We design the HVAC scope as part of the overall addition project so mechanical and framing work happen in the right sequence.
Yes. Modern MRCOOL heat pump systems are rated to provide heating efficiently in temperatures well below freezing — relevant for central Suffolk winters. They're not a replacement for a boiler in extreme cold snaps, but many Holbrook homeowners use them as primary heat for most of the season and fall back to existing systems on the coldest nights.
Electrical work associated with the installation typically requires a permit in Town of Islip. We handle the permit application and schedule the electrical inspection as part of the installation. Everything closes out properly.
A typical three-bedroom ranch in Holbrook works well with a three- or four-zone system — one handler per bedroom plus one for the main living area. We assess your floor plan and recommend the right configuration before you commit. A free written estimate covers equipment, installation, and permit costs together.
Get a free, no-obligation estimate for your project today.
