The problem is that about 90 percent of the energy used by washing machines during a warm- or hot-water laundry cycle goes to heating the water. So, by switching to cold-water washing, consumers can significantly lower the cost of their energy bills.
According to the Sierra Club, every household that switches to cold water washing could eliminate about 1,600 pounds of carbon dioxide a year. Many garment care labels in your clothing specify to wash in cool or cold water.
Con: Hot Water Can Damage or Discolor Clothing
The next time you're doing laundry, consider what kind of clothing you're washing. Hot water can cause bright colors to run and fade, and can shrink certain types of fabric. Hot water can also damage certain synthetic fabrics like polyester, nylon, and vinyl.
Water heating consumes about 90 percent of the energy it takes to operate a washing machine, according to Energy Star. Changing your washer's temperature setting from hot to warm can cut energy use in half.
If you've followed all the tips listed and are still trying to figure out what temperature is right, opt for cold. Cold water is less likely to cause color fading, bleeding, damage, or shrinking to your clothing. If using cold water doesn't adequately clean the clothes, then you can make adjustments.
When to Use Warm Water – For man-made fibers, knits and jeans, use warm water (90°F). Most of your clothes can be washed in warm water. It offers good cleaning without significant fading or shrinking. When to Use Cold Water – For dark or bright colors that bleed or delicate fabrics, use cold water (80°F).
Towels should be washed in the warmest water appropriate for the fabric according to the care label. Generally, warm or hot water is recommended for washing towels. Use a cycle specifically for towels or a normal/regular cycle.
Washing in cold water reduces your personal carbon footprint by 10% and is just as effective —most detergents today are formulated for cold washing. Air-drying your clothes helps reduce climate impact by 67%. Machine drying clothes accounts for 75% of laundry's total carbon footprint.
Typically, fabrics that are safe to wash with hot water include certain synthetic fibers such as nylon or polyester, as well as preshrunk cotton. Never wash materials such as wool, silk, viscose, or other delicate fibers with hot water.
Wash with the hottest water temperature setting listed on the care label. Polyester blends are best washed using warm water, while cotton can toleratehot water. Hotter water kills most germs and also takes care of dust mites that thrive in bedding. Wash at least once every other week.
Wash jeans in warm water: Most of the time when you have something that you want to wash gently you wash it in cold water. But that's not the case when you are washing denim jeans. Warm water will help the color stay in the jeans and help keep the jeans from shrinking. Hot water is too hot and can destroy the fabric.
However, hot water can shrink and damage clothes, even causing the colours to fade with some fabrics, to stop this from happening ensure that you read the labels on your clothing before choosing the hot option on your machine.
Hot water strips your hair of natural oils, especially if the temperature is too high. This will leave your hair with no natural, valuable oil and leave it looking dry and brittle. Hot water dries your scalp, which can lead to itchiness and dandruff.
Wash With Hot Water When You Can
Although there are several fabrics that fare better in cold water washes, you can sort your items by fabric type and care instructions, allowing you to wash items like underwear and undershirts in hot to eliminate odors and stains.
Results: Average annual laundry unit GHG emissions were 2947 t CO2e. Average GHG emissions were 0.225 kg CO2e per item-use and 0.5080 kg CO2e/kg of laundry. Natural gas use contributed 75.7% of on-site GHG emissions.
While cleaning dirt, hot water provides more solvent content in its molecular structure. This means that a lot of detergent molecules can bond with dirt and separate it from the clothes. Hot water cannot bond with any insoluble dirt, making it a better medium to clean than cold water.
Don't Wash Your Sheets and Towels Together. Linens and towels should be washed separately for the following reasons: Material Weight: Different material thickness means sharing a wash cycle can cause damage! Different Material: Pilling can be prevented by washing with similar materials and textures.
Soaking socks in hot water can lead to shrinking, fading, and permanent wrinkling (nobody likes that). Using cold water helps preserve the quality of your socks by thwarting color fading and fabric fiber shrinkage.
Many dishwashing and laundry detergent pods are coated in polyvinyl alcohol (PVA), which dissolves in water. Gennaro says it is neither safe nor biodegradable as has been claimed. Opt for plastic-free detergent brands and shop at refill stations to reduce your impact.
Try quick and cold washes. If you're currently washing at high temperatures, try turning your washing machine down to 30°C and turning your wash cycle to a 60 minute quick wash and see if you notice a difference. You'll probably find your clothes still come out clean, with a substantially smaller energy expense.
Dead skin cells, bacteria, and even sweat can accumulate quickly on your towels, so using a fresh one about every three days is a simple rule of thumb—for all kinds of towels.
For the best clean, wash sheets in the hottest water on the heavy-duty cycle. While warm or hot water may be suitable for light-colored cotton linens and during cold and flu season, you should always follow the care instructions that come with your sheets.
According to Annie Chiu, MD, a board-certified dermatologist and founder of The Derm Institute, there's a clear guidance on when to make the swap. “Generally, you should change your towels every three to four uses,” she says. “This helps prevent the buildup of bacteria and odors.”