Why lowering your thermostat by just one degree saves 1% of fuel
In short: It feels counterintuitive to let your home get colder or warmer while you are away. However, the physics of heat transfer prove that small adjustments to your target temperature can significantly slash your energy bills without compromising your comfort when you return.
The core principle behind thermostat setbacks is the management of 'Delta T'—the temperature difference between the inside of your home and the outside environment. During the winter, heat naturally moves from your warm interior to the cold exterior. By lowering your target temperature, you reduce this difference, which slows the rate of heat loss. For example, if it is zero degrees outside and you drop your indoor target from 70 degrees to 60 degrees, you significantly decrease the amount of heat escaping your home.
Quantitatively, the Department of Energy suggests that for every single degree you lower your target temperature, you can save approximately 1% of fuel over an eight-hour period. In a scenario where you drop the temperature by 10 degrees, you could see a 10% reduction in your heating bill. This works in reverse during the summer: raising the thermostat prevents your air-conditioning system from running constantly, lowering your electrical costs. Crucially, the energy required to reheat a home after a setback is always less than the energy consumed by a system running continuously to maintain a constant temperature.
However, these savings are not universal. Certain home configurations can negate the benefits of a setback. Experts warn against using programmable clock thermostats with electric heat pumps, radiant-heat systems with long recovery times, or homes with extremely tight building envelopes. In these specific cases, the mechanics of the heating source or the insulation level make the standard setback strategy less effective or impractical.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Summary by Intellect · source: How Thermostat Setbacks Save Money | Ask This Old House
To cite this card, link to https://intellectplus.co.uk/app/society-how-thermostat-setbacks-save-money-ask-this-old-house.
How we source, check and correct cards: Editorial standards.
General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.
Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?
Related
More in DIY & home improvement · More in Society · Latest · A–Z · All topics
