Smarter Home Energy. Lower Monthly Bills.
Clear, practical guidance for understanding how your home uses energy—and where thoughtful changes may make a difference.
Make Sense of Your Home Energy Use
Energy bills can be confusing. Equipment labels, efficiency ratings, climate, utility prices, and household habits all affect what you pay.
DwellWatt turns those details into straightforward explanations, realistic estimates, and useful comparisons for U.S. households. Our goal is to help you ask better questions and make more informed decisions—not promise a specific result.
Latest Home Energy Guides
Find practical answers about electricity use, heating costs, and your monthly bill. Each guide explains the calculations and the factors that can change your results.
New to energy costs? Start with our guide to calculating the electricity cost of any appliance.
-
What Is a Smart Thermostat? Savings and Payback Guide
A smart thermostat is not a guaranteed discount on your whole bill. Learn how it works, estimate savings and payback, and check whether an upgrade fits your home.
-
Is Electricity Cheaper at Night? Check Your Rate Plan
Electricity is not always cheaper at night. Learn how to check your rate plan, find off-peak hours, and calculate the savings before changing your routine.
-
AUX Heat on Your Thermostat? What It Means and What It Costs
Learn what AUX heat means, how it differs from emergency heat, and how to estimate electric backup costs without disabling necessary heating.
-
How Many Watts Does a Refrigerator Use? Daily kWh and Monthly Cost
Find out what refrigerator watts mean, calculate daily kWh and monthly cost, and compare documented examples using your own electricity rate.
-
Space Heater vs. Central Heat: Which Costs Less to Heat One Room?
A space heater is not automatically cheaper than central heat. Compare your rates, heating system, and the cost of warming just one room.
-
Why Is My Electric Bill So High? 15 Causes and How to Lower It
Learn why your electric bill increased, compare kWh per day and rates, and find practical ways to lower home electricity costs safely.
Start With Your Home Energy Question
Why did my bill go up?
Separate higher electricity use from higher prices and longer billing periods. Then check whether your rate plan offers cheaper hours.
Work through the high electric bill checklist · Find out when electricity is cheaper on your plan
What does this appliance cost to run?
Use watts or measured kilowatt-hours, operating time, and the rate on your bill. Our worked examples show which inputs matter and where a simple estimate can mislead.
Calculate any appliance’s electricity cost · Estimate refrigerator use · Estimate dehumidifier costs
Which heating or thermostat choice makes sense?
Compare the equipment you already have, the room you need to heat, and the cost of changing your controls. Check the assumptions before spending money.
Calculate space-heater running costs · Compare a space heater with central heat · Understand AUX heat · Check smart-thermostat savings and payback
Practical Answers, Clearly Explained
Our guides distinguish verified facts from estimates. We prioritize authoritative U.S. sources, explain assumptions in calculations, and identify variables that can change the outcome.
Actual energy use and savings vary by home, climate, equipment, utility rate, installation quality, and household behavior.
About DwellWatt and its editorial approach · How sources, calculations, and corrections are handled · Suggest a topic or report an error