Keeping a home comfortable in summer is not just about running the air conditioner harder. The most effective approach is a whole-home one: better insulation, smarter thermostat settings, efficient windows, shading, ventilation, and HVAC choices that reduce heat gain and control humidity more effectively. DOE says these strategies can often keep a home cool with minimal air conditioning. Schaeffer Homes applies that whole-home mindset to custom home construction across New Jersey, Pennsylvania, Delaware, and Maryland.
Heating and cooling use a major share of building energy worldwide, which is exactly why smart design choices matter so much during the hottest months.
The best ways to keep a home cool in summer are improving insulation and air sealing, choosing energy-efficient windows, adding shade, using smart thermostat settings, improving ventilation and selecting efficient HVAC equipment. These strategies work best when planned together rather than treated as separate upgrades.
When summer temperatures rise, many homes lean harder on air conditioning. That can keep indoor spaces livable, but it also pushes up energy use and monthly utility bills. MIT Climate Portal says almost 25% of the energy produced worldwide is used to heat and cool homes and commercial buildings.
That matters because cooling efficiency is not just about one appliance. It is about how the whole home works together. Energy-efficient cooling means reducing heat gain and cooling demand before the system has to work harder. The U.S. Department of Energy explains that proper insulation, energy-efficient windows and doors, shading and ventilation can often help keep a home cool with minimal air conditioning.
For us as builders, that is the bigger picture. A comfortable summer home is not created by a single upgrade. It comes from smart choices throughout the home’s design and construction.
One of the simplest ways to improve summer efficiency is to manage indoor temperatures more intentionally. The Department of Energy notes that raising your thermostat setting in summer helps slow the flow of heat into your house, which saves energy on air conditioning.
It is recommended to start with an indoor temperature between 75°F and 78°F during the day and raise the setpoint when no one is home. That does not mean every family will keep the exact same setting all day, but it does reinforce the idea that slightly higher settings can reduce unnecessary cooling demand.
Smart thermostats make that easier to do consistently. ENERGY STAR explains that many smart thermostats can learn your preferences, build schedules automatically and adjust to energy-saving temperatures when you are asleep or away.
That convenience is a big reason smart thermostat savings can add up over time. Instead of relying on constant manual adjustments, homeowners can automate better cooling habits to maintain more consistent comfort.
A powerful cooling system can only do so much if conditioned air keeps escaping. That is why insulation and air sealing matter so much. They help hold cooled air inside where it belongs and reduce how hard the HVAC system has to work.
ENERGY STAR estimates that homeowners can save an average of 15% on heating and cooling costs by air sealing their homes and adding insulation in areas like attics, floors over crawl spaces and basements.
Just as important, insulation improves comfort in both seasons. ENERGY STAR notes that insulation helps keep your home cool in the summer and warm in the winter.
For custom home construction, this is one of the most valuable places to get things right from the beginning. Because insulation and air sealing are built into the structure itself, they are much easier to get right during construction than to correct later. Good insulation and air sealing are not flashy upgrades, but they affect comfort in every room and every season.
Windows have a huge influence on summer comfort because they are one of the main pathways for solar heat gain. The Department of Energy says that heat gain and heat loss through windows account for 25% to 30% of residential heating and cooling energy use.
That is why energy-efficient windows can make such a difference. Features like low-emissivity coatings, better frame materials and multi-pane construction can help reduce unwanted heat transfer. If new windows are not part of the plan right away, window coverings can still help to reduce heat in the daytime hours.
In practice, that means homeowners can reduce cooling loads with both permanent upgrades and lower-cost day-to-day strategies. Well-chosen windows support year-round efficiency, while blinds, curtains and shades give homeowners more day-to-day control.
Landscaping can do more than improve curb appeal. It can also serve as a real cooling tool. The Department of Energy says shading and evapotranspiration from trees can reduce surrounding air temperatures by as much as 6°F.
Strategically placed trees, shrubs, and vines can provide effective shade, and carefully positioned trees may help reduce a typical household’s energy use by up to 25%.
This is one reason landscaping for shade is worth considering early in the planning process. Shade can help reduce direct sun exposure on windows, walls and outdoor living areas, which lowers how much heat the home absorbs during the day. Trees on the sunnier sides of the home, shaded outdoor areas and thoughtful plant placement can all help cut down on direct heat exposure. The result is a cooler outdoor environment and less heat pressing against the house throughout the day.
Ceiling fans do not lower the actual air temperature, but they can make people feel cooler by improving air movement. In summer, the fan should spin counterclockwise so it pushes air downward and creates the cooling breeze people actually feel. In many cases, that added airflow allows homeowners to raise the thermostat setting by about 4°F without reducing comfort.
That can lead to meaningful energy savings when fans are used in occupied rooms and turned off when spaces are empty, since fans cool people rather than the room itself. More efficient fan models can also help reduce energy use while still improving comfort.
Whole-house fans are another cooling option that can work well in the right climate and home design. A whole-house fan is a ventilation system that pulls cooler outdoor air in through open windows and pushes warmer indoor air up and out through the attic.
When used under the right conditions, it can help handle much of a home’s cooling needs, especially in places where evenings cool down enough to flush built-up heat from the house. That is what makes whole-house fans especially appealing in climates where cooler nighttime air naturally resets indoor comfort the next day.
Natural ventilation can also play a helpful role in a well-designed home. While it may not replace mechanical cooling during the hottest and most humid stretches of summer, it can improve comfort and reduce cooling demand during milder parts of the day, especially in the morning, evening, or shoulder seasons.
This is where window placement, cross-breezes, and nighttime airflow become especially important. When a home is designed to take advantage of natural air movement, those simple strategies can help release built-up heat, bring in fresher air, and support a more balanced approach to summer comfort.
For homeowners planning a new build or a major upgrade, HVAC equipment remains a major part of the comfort equation. During cooling season, heat pumps move heat from inside the home to the outdoors instead of generating cool air in the traditional sense, which is one reason they can cool so efficiently.
That operating approach is a big part of what makes heat pump efficiency so appealing. Rather than forcing the system to work harder to create cooler conditions, it removes heat from the spaces where you do not want it.
There is also a comfort advantage beyond temperature. High-efficiency heat pumps can remove humidity more effectively than standard central air conditioners while using less energy, which helps the home feel cooler and more balanced overall. For many homeowners, improved moisture control is just as important as the air temperature itself.
Big upgrades matter, but small daily choices help too. Spot ventilation, like bathroom and kitchen exhaust fans, can help remove heat and humidity generated inside the home. Homeowners can also reduce indoor heat buildup by using microwaves or outdoor grilling instead of stovetops and ovens when possible.
Lighting choices can make a difference as well. Residential LEDs use at least 75% less energy and can last up to 25 times longer than incandescent bulbs, helping reduce both energy use and excess indoor heat.
We also encourage homeowners to keep up with regular HVAC maintenance, replace filters on schedule, and avoid blocking supply vents with furniture or rugs. Those common-sense steps improve airflow and help the cooling system perform as it should.
Imagine a home that combines insulation and air sealing, energy-efficient windows, strategic shade, ceiling fans and a smart thermostat. No single feature has to do all the work. Instead, each one helps lower the strain on the cooling system.
DOE says that new energy-efficient heating or cooling equipment alone can reduce energy use by 20% or more, and combining a new system with recommended insulation, air sealing and thermostat settings can cut heating and cooling bills by about 30%.
Keeping a house cool in summer is not about relying on a single feature or appliance. It is about bringing together better design, better materials and better systems so the whole home works smarter. At Schaeffer Homes, we believe that one of the biggest advantages of building with intention from the start is that it allows us to deliver a home that is built to last. When we incorporate energy-efficient solutions into the home’s design, we create spaces that feel more comfortable, support lower utility costs and serve families well through every season.
A good starting point is usually between 75°F and 78°F during the day, then slightly higher when no one is home. The exact setting depends on your comfort level, but the goal is to avoid overcooling the house when it is not necessary.
Insulation can help lower cooling costs by slowing heat transfer and keeping conditioned air inside the home. When insulation is paired with good air sealing, it can make the home more comfortable and reduce how hard the cooling system has to work.
Windows are one of the biggest sources of unwanted heat gain in summer. The right windows, along with blinds, curtains, or shades, can help reduce solar heat and make indoor temperatures easier to manage throughout the day.
Yes, when they are used correctly. Ceiling fans help people feel cooler by improving air movement, which can make it possible to raise the thermostat a few degrees without sacrificing comfort. They work best in occupied rooms and should be turned off when no one is there.
In summer, your ceiling fan should spin counterclockwise. That pushes air downward and creates the cooling breeze people actually feel, which helps make the room feel more comfortable.
Yes. Well-placed trees, shrubs, and other landscaping features can provide shade, reduce direct sun exposure, and help lower the temperature around the home. That can ease some of the cooling load during the hottest parts of the day.
A whole-house fan is a ventilation system that pulls cooler outdoor air in through open windows and pushes warmer indoor air up and out through the attic. In the right climate and at the right time of day, it can help remove built-up heat and reduce reliance on air conditioning.
Sometimes, but it depends on the climate and the time of day. In places with cooler mornings, evenings, or shoulder-season weather, natural ventilation can help improve comfort and reduce cooling demand. During hot and humid stretches, it usually works best as part of a broader cooling strategy.
Yes. Heat pumps are efficient because they move heat out of the home instead of generating cool air in the traditional sense. Many high-efficiency models also do a good job of controlling humidity, which helps the home feel more comfortable overall.
The most effective approach is usually a layered one: smart thermostat settings, insulation, air sealing, efficient windows, shading, better airflow, and the right HVAC system. When those elements work together, the home can stay more comfortable without relying as heavily on constant air conditioning.
