Reduce Your Energy Costs With Landscaping

energy bills

Landscaping can significantly reduce energy costs of heating and cooling the home. Some well-placed shade trees, evergreens and shrubs not only look great, but also keep the house cool in the summer and warm in the winter.

Not much solar energy enters our homes through the walls and roof because of the insulation. Sun shining through the windows accounts for about half of the unwanted heat in a house during the summer. Twice as much solar energy enters through the east and west windows as the south windows, particularly if there is a roof overhang on the south side of the house.

The sun and wind both affect the temperature of residences in winter. A substantial amount of warmth can be gained from the sun shining through a southern facing window in the winter when the sun is low in the sky. East and west windows can also provide solar energy gain in the winter. The solar energy from the windows may provide 4-18% of the total energy needed to heat the home. Although, escaping warm air, along with cold wind penetrating a home, increase the heating costs and account for 24-39% of the heating requirements.

How to Utilize Landscape to Save Energy

Windbreaks:

  • Create windbreaks to block harsh winter winds, generally using evergreens and different sized shrubs.
  • Commonly, the harsh winter winds come from a different direction than the cool summer breezes. Begin by placing an effective windbreak on the side of the house where the winter winds prevail. This can provide shelter for the home from cold winds, and therefore reduce heating energy costs.
A Well-Made Wind Break

A well planned windbreak, forces a large area of relatively calm air to form downwind from the windbreak.

To be effective, the windbreak should contain trees and shrubs that are the right height, thick enough, and in a long enough row to protect the house. The most proficient windbreaks are made of at least one row of dense evergreen trees whose branches extend to ground level. Windbreaks are planted in rows perpendicular to the wind direction.

Winter landscape
Winter Landscape

For us in the Midwest, the windbreak will run to the north and west of the home. A windbreak that permits 50-60% of the wind to penetrate (such as plant material) is superior to a solid barrier (such as a solid fence) because it creates a larger area of protection on the leeward (downwind) side.

Smaller yards do not have space for large evergreen trees, but the canopy of tall deciduous trees can provide a great deal of protection. To be effective, mature trees should cover at least half the canopy space. This will provide some defense from winter winds, and a significant amount of shading from hot summer sun.

Seasonal Solar Energy:

Enlarge the deciduous tree canopy in specific areas to either shade or not obstruct the solar energy.

Deciduous shade trees should be planted due west and east of windows. Shade trees in these locations will shade the late morning and afternoon sun, which produces the most heat to homes in summer. Be sure to research and choose the right tree for the location. The chosen tree should grow within 20 feet of windows and at its mature size, be 10 feet higher than the windows its shading.

Summer Landscape
Summer Landscape

Trees planted to the south of the home will have an opposing result on energy savings. In the summer, the midday sun is high, almost directly overhead. The resulting shadow of a tree will fall directly under the tree, and miss the house, providing no shading. Alternatively, in winter, when the sun is at a much lower angle, the branches will shade to the house, rather than letting the full solar heating benefits get through. Mature deciduous trees in summer block 60 to 90% of the sun. In winter, a mature tree’s branches and twigs will block approximately 30 to 50% of the sun.

In addition to shading the house, trees or shrubs should be planted to provide shade to air conditioners. Be aware of where the fans discharge on the unit, as this could cause drying of the herbaceous screen. Keeping the surfaces of the air conditioner allows it to run more efficiently.

Additional Tips:

Foundation plantings of shrubs and small trees can also considerably reduce energy costs. In addition to reducing the amount of wind that hits a home, shrubs planted next to the house can provide insulation as it creates a dead airspace next to the foundation. Plant shrubs so at mature size there will be approximately 1 foot of space between the plants and the building.

If drifting snow is a problem in the yard, windbreaks of trees and shrubs can act as living snow fences to control the location of snowdrifts. Lower shrubs planted on the windward side of the windbreak will trap snow before it blows next to the home. Winds will funnel around the ends of a snow fence. If possible, the row of plants should extend beyond the snowdrift area. A minimum of two rows of deciduous shrubs and/or one row of evergreens are most effective for snow control.

© Wellness Garden Design

FAQ’s

How to reduce energy costs by installing plants.

Foundation plantings of shrubs and small trees can also considerably reduce energy costs. In addition to reducing the amount of wind that hits a home, shrubs planted next to the house can provide insulation as it creates a dead airspace next to the foundation. Plant shrubs so at mature size there will be approximately 1 foot of space between the plants and the building. Summer landscape

How to save money on energy with landscaping.

Trees planted to the south of the home will have an opposing result on energy savings. In the summer, the midday sun is high, almost directly overhead. The resulting shadow of a tree will fall directly under the tree, and miss the house, providing no shading. Alternatively, in winter, when the sun is at a much lower angle, the branches will shade to the house, rather than letting the full solar heating benefits get through. Mature deciduous trees in summer block 60 to 90% of the sun. In winter, a mature tree’s branches and twigs will block approximately 30 to 50% of the sun.

How do I build a windbreak?

Create windbreaks to block harsh winter winds, generally using evergreens and different sized shrubs.
Commonly, the harsh winter winds come from a different direction than the cool summer breezes. Begin by placing an effective windbreak on the side of the house where the winter winds prevail.
To be effective, the windbreak should contain trees and shrubs that are the right height, thick enough, and in a long enough row to protect the house.
For us in the Midwest, the windbreak will run to the north and west of the home. A windbreak that permits 50-60% of the wind to penetrate (such as plant material) is superior to a solid barrier (such as a solid fence) because it creates a larger area of protection on the leeward (downwind) side. Wind break

How to save money on electricity with landscaping?

By planting trees just the south of the home, there will be huge energy savings. In summer, the midday sun is high, almost directly overhead. The shadow of a tree will fall directly under the tree, and miss the house, providing no shading. In winter, when the sun is at a much lower angle, the branches will shade to the house, rather than letting the full solar heating benefits get through. Mature deciduous trees in summer block 60 to 90% of the sun. In winter, a mature tree’s branches and twigs will block approximately 30%to 50% of the sun.

Published by Wellness Garden Design

Wellness Gardens use plants that excite the senses, are inclusive to all & aids in nurturing serenity. 💚🌳💚 Grant aid for nonprofits #gardenscanheal

7 thoughts on “Reduce Your Energy Costs With Landscaping

  1. Really good ideas for planning your garden and house with heat, cold and wind in mind. I think today houses are just shoved in without a thought for this.
    Luckily for us our house is fairly old (for here – 50-ish years I think) and was built with small windows facing the winds and also planned to let the sun in in winter but not in summer.
    What you say about shade trees is so important. One year I’d had All my trees heavily pruned – and we really suffered with the heat till they grew back. Never again! Now it will only be half the garden pruned at a time! 😀

    1. Thank you! Yes, I think the builders in the past had to really think about the climate, as AC was not really a ‘norm’ in homes till I’d say, the 70’s here. I remember when we had central AC put into my childhood home (built circa 1950) in 1975ish. They really had to work cutting through the beams for venting!!
      My current house was totally thought-out better than any house I’ve ever lived. I rarely needed AC until I got old enough to be hot all the time 😉 Now, its a staple!
      Ouch on the pruning! Well, you know now, at least.

      1. Yes, planning buildings and planting trees makes a huge difference.
        I dream of AC! 😀
        As to being hot all the time, in the shops the other day a woman asked me if I’d been jogging! haha

      2. haha It’s not the first time I’ve been asked! (The ‘running shoes’ I have to wear with my orthotics might help!) I just said – “No, just walking!” 😀

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