Greenville’s cooling season runs from April into October, which means whatever system you choose will work for months at a stretch rather than a few weeks in August. That makes the choice worth more thought than taking whatever the last house had. Most guides compare the systems one by one, and this post starts from the other end, with the kinds of house the Upstate is built from. The right system depends less on the equipment’s brochure than on the ductwork, the fuel, the layout, and the lot you already have.
A house with sound ductwork
Most Greenville homes built since the 1970s have ductwork, and if it is in good shape, the choice is between central air conditioning and a heat pump. Central air uses the ducts to cool the whole house from one outdoor unit and pairs with a separate furnace for heat; its SEER2 rating, a measure of how much cooling it produces for the electricity it uses, gives you a number to compare across models. A heat pump cools in summer and heats in winter from the same outdoor unit, which means one system to maintain, and since Upstate winters stay mild apart from the occasional hard freeze, a heat pump handles both jobs without leaning heavily on its backup heat. For a house with good ducts and electric heat, the heat pump is the usual answer, and a house with gas service has two more options below.
The same house, with gas service
A home with natural gas has two more options, and the Upstate’s hard freezes make them worth considering. A dual fuel system pairs a heat pump with a gas furnace and switches between them by outdoor temperature: the heat pump handles the mild days that make up the bulk of a Greenville winter, and the furnace takes over on the nights in the 20s when a heat pump’s electric strips would be the expensive way to heat. It is the most comfortable and efficient way to heat here for a house that has gas. A gas pack puts the air conditioner and the gas furnace in one cabinet outdoors, which suits homes with no room for indoor equipment.
A two-story house where the upstairs bakes
Central systems cool evenly by design, which is exactly the problem in many two-story Upstate homes, where the upstairs runs several degrees warmer than the downstairs every July afternoon. Lowering the thermostat enough to cool the upstairs chills the downstairs and runs up the bill. HVAC zoning adds motorized dampers in the ductwork and a thermostat on each floor, so each level runs at its own temperature and the system stops over-conditioning one to reach the other. It is planned alongside a new system or a duct project, and it replaces the window unit in the upstairs bedroom with a fix.
A house without ducts, and a room added later
Greenville’s mill houses and many of its older homes were built without ductwork, and running new ducts through a century-old house is disruptive and sometimes impossible. A ductless mini-split skips the ducts entirely, cooling a room or a zone from a wall-mounted unit connected to a compact outdoor one, and a multi-zone system can cover a whole small house. The same equipment solves the other common Upstate problem: the sunroom, the bonus room over the garage, or the garage conversion that the original ductwork never reached. Because each zone runs on its own, a home office can be cooled without conditioning the whole house to match.
Room for loops in the yard, and a long view
A geothermal system uses loops buried in the yard to exchange heat with the ground, which stays at a steady temperature year-round, rather than with outdoor air that swings from the 20s to the 90s. It is the most efficient option available and the most expensive to install, since the loops require excavation, and it suits a home on a lot with room for them and an owner planning to stay long enough to recover the difference. In the Upstate’s red clay, the loop design is part of the estimate rather than an afterthought.
Getting a recommendation for your house
Carolina Heating Service has served Greenville and the Upstate since 1981. An in-home consultation measures the house, inspects the ductwork, checks the gas and electrical service, and recommends the system that fits the house you have, with a firm price presented before anything is scheduled, financing available, and a 10-year parts and labor warranty on the new system. Schedule online or through the 24/7 website chat, and the recommendation will come with the reasoning behind it, so the decision is yours to make on facts.