Problem: An old oil heating system left the house with hot and cold spots during the winter; in the summer, the lack of central AC forced this family to resort to inefficient, expensive window AC units and fans.
Solution: N.E.T.R., Inc. installed a multi-zoned mini-split ductless heating and cooling system with four indoor units and a single outdoor condenser. This solution will supplement the existing oil heat and provide cooling relief in the summer.






This multi-family home in Somerville, MA, was using an oil heat system to keep their house warm during the winter months. Unfortunately, the old oil system did not efficiently heat the entire home, and some of the rooms stayed chilly no matter how high the heat was set.
This family’s condo is in Somerville, MA, in a multi-family style home. Because many multi-family dwellings in the area are converted from old, single-family homes, they often have similar heating and cooling problems. The old oil heating systems often work well in single-family homes, but frequently leave hot and cold patches throughout the rooms in bigger, multi-family houses.
After the initial assessment, Jimmy Smithell, the project manager, proposed a multi-zoned mini-split Mitsubishi ductless system. This system would include a single outdoor heat pump and condenser unit, and four indoor wall-mounted AC units in both bedrooms, the family room, and the kitchen. These rooms were the most problematic, and this would offer the best heating and cooling solution for the family.
The Mitsubishi ductless mini-split system, like the one used in this home, offers a variety of benefits for homeowners who face uncomfortable indoor temperatures. First and foremost, families remark on the increased comfort of their home. Each unit is controlled separately from the others, so every room can be adjusted to the temperature needed without interfering with the other rooms. This design allows the family the flexibility they need to adequately supplement their existing oil heat system.
Another benefit to ductless mini-split heating and cooling systems is that they are easy to expand upon later. The outdoor condenser is equipped to handle multiple zones of heating and air conditioning, so it’s easy to add on at any point.




