Lake KeoweeHVAC

What heating and air do Lake Keowee homes have?

Nearly all heat pumps. Homes on the lake typically heat and cool with an all-electric heat pump backed by electric heat strips, and at Keowee Key about 95% of homes heat with electricity.

Lake Keowee is a Duke Energy reservoir of about 18,400 acres and 387 miles of shoreline that supplies cooling water for Oconee Nuclear Station. Keowee Key, a gated community of about 3,350 people, has a median build year of 1990. A heat pump lasts about 10 to 15 years in the Upstate, so a house from then is likely on at least its second system. The backup heat strips are worth watching too: when they run often, the power bill shows it.

How do you keep a closed-up lake house from getting humid?

Keep the system running while you are away rather than switching it off. About 18% of Keowee Key homes are seasonal, and a closed house with the AC off sits through July dew points around 68°F, letting moisture build in rooms and the crawlspace.

• Leave it on cool, set a few degrees warmer than when you are there, instead of off.
• Watch the size. An oversized system cools fast and shuts off before it removes much moisture. If the house feels clammy at the set temperature, size the next system from a proper Manual J calculation, not the old unit’s label.
• Check under the house. Standing water or loose, leaky ducts in the crawlspace add moisture the AC then has to fight.
• Watch it from home. A smart thermostat, $250–$550 installed, shows the indoor temperature while you are away, and Duke pays $125 toward one installed with HVAC work.

The guide on why a house stays humid with the AC running goes further.

Are mini-splits a good fit for lake homes?

Often, for spaces the main system doesn’t reach well: a finished lower level, a bonus room or an addition. A one-room mini-split typically runs $3,000–$6,000, and each added room $2,000–$3,000.

Duke’s Smart $aver pays $700 or $900 for a mini-split of 18 SEER2 or better serving at least 1,000 square feet. The mini-split installation page explains how a job goes, from choosing head locations to the line set.

Is it colder around Salem and Lake Jocassee?

Yes. Salem (Oconee County, ZIP 29676) sits at about 1,080 feet near Lake Jocassee and Devils Fork State Park, the only public access to Jocassee, and its nights run colder than Seneca’s. For a sense of it, Walhalla, about 100 feet lower, logs 79 freezing nights in an average year to Clemson’s 57.

Salem itself has just 129 people, but its ZIP holds many more homes: nearly one in five is seasonal, and more than four in five heat with electricity. On the coldest nights a heat pump leans on its backup heat, so have that tested before winter.

Who supplies power and issues permits around the lake?

It depends on the side of the lake and the road. Power comes from Duke Energy or Blue Ridge Electric Cooperative, and permits from Oconee County Building Codes, which also covers Salem by contract, or Pickens County Building Codes on the Pickens side.

On the Pickens side, permits cost $75 up to an $8,000 job and $10 for each further $1,000; start before the permit and the fee doubles. Duke customers can claim Smart $aver heat pump rebates of roughly $350–$900, and Blue Ridge members can find out whether the co-op’s heat pump financing fits their house. Start with a ballpark price for your lake house in Oconee or Pickens County, SC.