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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteThe ideal vacation thermostat setting is a range, not a single magic number. For most U.S. homes, set the air conditioning to about 80-85°F in summer and set the heat to about 55-60°F in winter. That is usually enough to reduce energy use without leaving the house vulnerable to humidity damage, frozen pipes, swollen wood, stale air, or an overloaded HVAC system when you return.
If you want the short answer: in a dry or moderate summer climate, 85°F may be fine. In hot, humid areas, 80-82°F is often the smarter ceiling unless you have separate dehumidification. In winter, 55°F is the lowest setting we are comfortable recommending for a typical occupied home that still has plumbing, finishes, appliances, and contents to protect. Older homes, homes with crawlspaces, plumbing in exterior walls, or severe cold in the forecast should stay closer to 58-60°F.
On our job sites, we see the same pattern every year: the thermostat setting is only part of the story. A tight, well-insulated house with clean ducts and good humidity control behaves very differently from a leaky house with attic ductwork, poor insulation, and a clogged condensate drain. The right vacation setting should save money, but it also has to protect the building.
Best Vacation Thermostat Settings by Season
Use these ranges as a practical starting point, then adjust based on climate, home condition, pets, and HVAC type.
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#1 Best Overall
- ENERGY STAR certified smart thermostat for home that helps you save energy and stay comfortable.Connectivity : Wi-Fi - 802.11b/g/n 2.4 GHz, 802.11a/n 5 GHz Wi-Fi., Wireless interconnect : Bluetooth Low Energy Please refer to the product description section below for all applicable legal disclaimers.Product note: You can also check your system’s compatibility before purchasing a Nest thermostat with our online Nest Compatibility Checker on the Google Nest support page
- The Nest Thermostat is designed to work without a C wire in most homes, but for some systems, including heating only, cooling only, zone controlled, and heat pump systems, you’ll need a C wire or other compatible power accessory
- Nest Thermostat turns itself down when you leave, so you don’t waste energy heating or cooling an empty home. Lock feature: No
- Programmable thermostat that lets you create an energy efficient schedule in the Google Home app on your Android or iPhone
- Remote control lets family members change the thermostat temperature from anywhere on a phone, laptop, or tablet[1]
| Situation | Recommended setting | Why it works |
|---|---|---|
| Summer vacation, most homes | 80-85°F cooling | Reduces AC runtime while keeping the house from baking for days. |
| Summer vacation, humid climate | 80-82°F cooling, with humidity below 50-60% RH | Keeps the AC cycling enough to remove moisture. |
| Summer vacation, dry climate | 82-85°F cooling | Humidity risk is lower, so a warmer setting is usually acceptable. |
| Winter vacation, most homes | 55-60°F heating | Protects plumbing and finishes while cutting heating demand. |
| Winter vacation, older or poorly insulated home | 58-60°F heating | Adds margin for cold corners, crawlspaces, and exterior-wall plumbing. |
| Home with pets | Usually 76-80°F cooling and 60-68°F heating | Comfort and safety depend on the animal, age, health, and humidity. |
The Department of Energy has long supported thermostat setbacks and setups as a real energy-saving strategy. A change of 7-10°F for 8 hours a day can save as much as 10% per year on heating and cooling. Vacation settings extend that same logic over several days, but with one big difference: nobody is home to notice humidity, frozen plumbing, a tripped breaker, or an HVAC fault. That is why the best setting is conservative enough to protect the house.
Summer Vacation: Why 80-85°F Is the Right Starting Range
For a summer trip, set your thermostat about 5-10°F warmer than your normal occupied cooling setting. If you usually keep the house at 74°F, a vacation setting between 80°F and 84°F is reasonable. If you normally keep it at 76°F, 82-85°F is usually fine in a well-performing home.
The reason is simple: the wider the gap between outdoor temperature and indoor temperature, the harder your AC works. Letting the house drift warmer reduces compressor runtime. That matters in 2026 because electricity costs are not trivial. EIA reported average total electricity revenue of 13.83 cents per kWh in May 2026, up 5.3% year over year, with residential rates up 6.2% year over year. In high-rate states or areas with peak summer pricing, poor thermostat settings can become expensive quickly.
Still, we do not recommend turning the AC off completely in most homes. Interior finishes, cabinets, wood flooring, electronics, stored food, security systems, and indoor air quality all benefit from keeping the house within a controlled range. In a hot attic or second floor, indoor temperatures can climb well beyond the thermostat reading if the system is off for several days.
Humidity matters more than most homeowners think
Temperature does not tell the whole story. The EPA recommends keeping indoor relative humidity below 60%, and ideally between 30% and 50%. CDC guidance is even more conservative where possible, recommending indoor humidity no higher than 50% all day. A house set to 85°F can still be too damp if the AC barely runs and moisture keeps entering through air leaks, crawlspaces, bathrooms, or poorly sealed ductwork.
In humid states, we prefer pairing the vacation cooling setting with a humidity target. If your smart thermostat reports indoor humidity, set an alert at about 55-60% RH. If the home rises above that range, lower the cooling setpoint a few degrees or run a dehumidification mode if your equipment supports it. For a weeklong summer trip, that one alert can prevent odors, surface mold, swollen trim, cupped wood flooring, and musty furniture.
Test the setting before you leave
For trips longer than a weekend, test your vacation setting for 24 hours before departure. Set the thermostat to your planned vacation temperature, then check the app history or thermostat display for indoor temperature and humidity. If the house holds 83°F and 52% RH during a normal hot day, that is a good sign. If it hits 84°F and 65% RH, the temperature may be acceptable but the moisture control is not.
Before leaving, replace or inspect the HVAC filter, clear leaves and debris from around the outdoor condenser, confirm the condensate drain is not backed up, and leave interior doors open enough for air circulation. We also like to leave supply registers open unless a system was specifically designed and balanced for zoning. Closing random vents can increase duct pressure and create comfort or equipment problems.
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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsWinter Vacation: Set Heat to 55-60°F, Not Off
In winter, the risk calculation changes. The main goal is freeze protection. Set the heat to about 55-60°F while you are away. That range usually saves fuel while keeping the structure, plumbing, and finishes above dangerous temperatures.
Do not shut the heat off. Frozen pipes can cause far more damage than the cost of maintaining a modest indoor temperature. A burst supply line can release hundreds or thousands of gallons of water if nobody is home to stop it. Drywall, insulation, flooring, cabinetry, electrical components, and framing can all be affected.
Rank #2
- An Alexa thermostat - Amazon Smart Thermostat is an easy way to switch from a traditional thermostats for homes and help reduce energy usage.
- Create comfort zones throughout your home by connecting to select Alexa devices to automatically adjust heating and cooling based on temperature readings or presence detection.
- Save money and energy - After purchase, Amazon will send you an email with details about home thermostat rebates that may be available from energy providers in your area.
- Save energy - According to EPA estimates, ENERGY STAR certified thermostats save an average of $90 on yearly energy bills.
- Programmable thermostat and automatic control - Create your own home, away and sleep schedules, or have Alexa automatically control the temperature with Alexa+ advanced features.
Use the higher end of the range, around 58-60°F, if your home has any of the following conditions: plumbing in exterior walls, plumbing in an unconditioned attic, a vented crawlspace, poor attic insulation, known drafts, older windows, an attached garage with water lines, or a forecast that includes extended temperatures below 20°F. In a newer, well-sealed home with plumbing inside conditioned space, 55°F may be appropriate for a short trip.
Set alerts before severe cold
If you have a smart thermostat, set a low-temperature alert around 50-55°F. For longer trips, give temporary app access to a trusted neighbor, family member, or property manager. A simple check during severe cold can catch a dead thermostat battery, failed ignitor, tripped breaker, empty propane tank, or blocked intake before the house gets into trouble.
For homes with crawlspaces or known cold spots, we also recommend opening vanity doors under sinks on exterior walls and keeping interior doors open. That allows more warm air to reach vulnerable plumbing. If the home has hose bibs that are not frost-free, disconnect hoses before winter travel.
Heat Pumps Need a Different Vacation Strategy
Heat pump owners should be more careful with aggressive winter setbacks. Many heat pump systems use electric resistance auxiliary heat when the thermostat calls for a large temperature recovery. That auxiliary heat can be much more expensive to run than normal heat pump operation.
If you have a heat pump, use a thermostat that understands heat pump staging, auxiliary heat lockout, balance point settings, and recovery behavior. A smart thermostat or heat-pump-aware programmable thermostat can help the system recover gradually instead of jumping straight into auxiliary heat. Avoid dropping the temperature dramatically and then forcing a fast warm-up when you return.
For winter trips, a heat pump home may be better at 58°F with a scheduled recovery than at 52°F with a big manual jump to 70°F. The exact answer depends on outdoor temperature, equipment size, insulation, duct condition, and thermostat configuration.
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Smart Thermostats: What They Actually Add for Vacation
A smart thermostat is not valuable because it looks modern. It is valuable because it gives you control and warnings while you are away. ENERGY STAR says certified smart thermostats save about 8% of heating and cooling bills on average, around $50 per year in measured average savings. ENERGY STAR also notes that heating and cooling are nearly half of the average U.S. household energy bill, more than $900 per year, so even small improvements can matter.
If a household spends about $900 per year on heating and cooling, an 8% reduction equals about $72 per year. That does not mean every smart thermostat pays for itself quickly. Savings vary by climate, electricity or gas rates, comfort preferences, schedules, equipment type, and whether the old thermostat was already used well.
For vacation use, look for these features: remote access, humidity reading, temperature alerts, humidity alerts, equipment fault alerts, Wi-Fi disconnect alerts, vacation or hold mode, filter reminders, geofencing, multi-sensor support, heat pump compatibility, and utility rebate eligibility.
Smart thermostat cost in 2026
Device-only pricing commonly runs about $130-$300 or more for smart thermostats, with premium sensor packages costing extra. Professional smart thermostat installation commonly falls around $175-$500 in 2026, with many installs landing near $200-$500 depending on wiring and system complexity. Basic programmable thermostat replacement is often about $85-$300, with broader reported ranges around $68-$500.
Rank #3
- Save up to 23% every year on heating and cooling costs, adjusts to your set schedule to save energy when you’re gone and optimize comfort when you’re home. Compared to a hold of 72
- Compatible with 85% of systems, check your system’s compatibility with our online ecobee Compatibility Checker on the ecobee support page
- Change your temperature by easily tapping the color touchscreen or using the ecobee app. Plus, free software upgrades ensure you get the best out of your Smart Thermostat Essential, for years to come
- Automatically adjusts to your set schedule to save energy when you’re gone and optimize comfort when you’re home. Keep track of your energy consumption when you're on the go on the ecobee app
- Easy DIY install. No C Wire, no problem. Get the ecobee Power Extender Kit (PEK) for homes without a C-Wire and keep your walls looking nice with our trim kit – both sold separately
Higher-cost projects, around $400-$1,000 or more, usually involve added wiring, thermostat relocation, multi-zone systems, proprietary communicating equipment, line-voltage controls, heat pump auxiliary heat wiring, wall repair, or troubleshooting. The most common surprise is the missing C-wire. Many smart thermostats need a common wire for steady power, and adding one can turn a quick replacement into a more involved HVAC or low-voltage wiring job.
When to DIY vs When to Hire a Pro
Thermostat work can be simple, but it is not always simple. A homeowner who is comfortable turning off power, labeling low-voltage wires, using a level, and following the manufacturer’s wiring diagram can often replace a basic low-voltage thermostat in under an hour. That assumes the system is conventional, the wiring is already correct, and the new thermostat is compatible.
DIY is usually reasonable when you have a standard 24-volt forced-air furnace and central AC, clearly labeled wires, an existing C-wire, no zoning, no humidifier or dehumidifier control, and no heat pump auxiliary heat complexity. Take a photo before removing the old thermostat and label each conductor by terminal, not by wire color alone. Wire colors are common conventions, not guarantees.
Hire a pro if you have a heat pump, dual-fuel system, multi-stage equipment, multiple zones, proprietary communicating thermostat, line-voltage thermostat, whole-home humidifier or dehumidifier, boiler controls, radiant heat, or any wiring that does not match the new thermostat instructions. Also hire a pro if the thermostat needs to be moved. Placement matters: avoid direct sun, exterior walls, supply registers, kitchens, fireplaces, and drafty hallways. A bad thermostat location can make a good HVAC system behave badly.
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Most basic low-voltage thermostat swaps do not require a permit in many areas, but local rules vary. Line-voltage thermostats, new control wiring, equipment upgrades, panel work, or modifications to HVAC components may require a licensed contractor or inspection. If you are unsure whether your thermostat is low-voltage or line-voltage, stop and hire a qualified technician. Line-voltage controls can carry 120 or 240 volts.
For construction and remodeling projects, thermostat placement should be handled during design, not after paint. We coordinate thermostat locations with supply registers, return paths, exterior glazing, fireplaces, built-ins, and sunlight exposure because a thermostat is only as accurate as the wall it is mounted on.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Your House Construction Changes the Right Setting
Two homes on the same street can need different vacation settings. The difference is the building envelope: insulation, air sealing, duct leakage, window performance, attic ventilation, crawlspace condition, and moisture management.
A tight home with good attic insulation, sealed ducts, high-performance windows, and controlled ventilation can usually tolerate a wider temperature setup. A leaky home with ducts in a hot attic may need a lower summer setpoint because humid outdoor air is constantly entering and the AC has to run enough to dry the air. In winter, an older home with cold exterior walls and plumbing near unconditioned spaces needs a warmer setting than a newer home with plumbing inside conditioned space.
Rank #4
- EASY DIY INSTALLATION: Do it yourself fast with a built-in level and simple step-by-step instructions. Works with the HVAC equipment found in most homes
- COMMON WIRE REQUIREMENTS: Common wire(C-Wire) required for heat pump and heat/cool only systems. C-wire not required on most systems
- SAVE ABOUT 23% ON HVAC ENERGY: ENERGY STAR-certified and packed with features that help you save money, including flexible scheduling, geofencing, remote access and usage reports
- PRIVACY PROTECTION: Sensi won’t sell your personal information to third parties or leverage your thermostat activity data for targeting or advertising purposes
- CONTROL FROM ANYWHERE: The top-rated mobile app for Android and iOS devices makes it easy to control your comfort from a smartphone or tablet
Ductwork matters too. A thermostat in the hallway may say 82°F while a west-facing bedroom reaches 88°F. A crawlspace pipe may be near freezing while the living room is 56°F. That is why our crews look beyond the thermostat when solving comfort complaints. Air sealing, insulation depth, duct sealing, return-air pathways, and moisture control often matter more than changing the number on the wall.
Vacation Thermostat Checklist Before You Leave
Use this checklist the day before departure:
- Set summer cooling to 80-85°F, or 80-82°F in humid climates.
- Set winter heating to 55-60°F, using 58-60°F for older or higher-risk homes.
- Set humidity alerts around 55-60% RH if your thermostat supports them.
- Set low-temperature winter alerts around 50-55°F.
- Program recovery to begin a few hours before you return.
- Replace or inspect the HVAC filter.
- Clear the outdoor condenser area by at least 2 feet where possible.
- Confirm condensate drainage is clear and the drain pan is dry.
- Leave interior doors open for air circulation.
- Do not close a large number of supply vents unless the system is designed for it.
- Share thermostat app access with a trusted person for long trips.
- Check utility rebates before buying a smart thermostat; some programs still offer around $50, but availability changes by ZIP code and utility.
Finally, schedule the return temperature instead of forcing the system to recover all at once. In summer, start cooling a few hours before you arrive. In winter, give the heating system time to recover gradually, especially with a heat pump. Walking into a perfect 72°F house is less important than avoiding auxiliary heat spikes, short cycling, or humidity problems.
The Bottom Line
For most homeowners, the best vacation thermostat setting is 80-85°F for cooling and 55-60°F for heating. Use the cooler end of the summer range when humidity is high, and use the warmer end of the winter range when freeze risk is higher. Do not turn the HVAC system completely off unless the home is specifically designed, monitored, and protected for that condition.
The thermostat is a control point, not a cure-all. If your home cannot hold humidity below 60%, has cold rooms, overheated second floors, high energy bills, or comfort swings, the fix may be insulation, air sealing, duct sealing, ventilation, or drainage work rather than another adjustment at the wall. A good vacation setting saves energy. A good home system protects the house while it does it.
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What temperature should I set my thermostat to when I go on vacation in summer?
Set the AC to about 80-85°F for most homes. In humid climates, stay closer to 80-82°F and monitor indoor relative humidity so it remains below about 50-60%.
What temperature should I leave my heat on during winter vacation?
Set the heat to about 55-60°F. Use 58-60°F for older homes, poorly insulated homes, severe cold forecasts, or homes with plumbing in exterior walls, crawlspaces, garages, or attics.
Is it safe to turn off the AC completely while I am away?
Usually no, especially in hot or humid climates. Turning the AC off can allow high humidity, odors, mold risk, swollen wood, and stress on electronics or finishes. A setting around 80-85°F is safer.
Does vacation mode on a smart thermostat actually save money?
It can. ENERGY STAR says certified smart thermostats save about 8% of heating and cooling bills on average, or about $50 per year in measured average savings. Actual savings depend on climate, rates, habits, and equipment.
Should heat pump owners use the same winter setback as furnace owners?
Not always. Large winter setbacks can trigger electric auxiliary heat during recovery. Heat pump owners should use a compatible thermostat and schedule gradual recovery instead of making a large manual temperature jump.
Do pets change the recommended vacation thermostat setting?
Yes. Many homes with pets should stay closer to normal occupied temperatures, often around 76-80°F for cooling and 60-68°F for heating, depending on the animal’s age, health, breed, and humidity.
Quick Recap
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