Home & garden

Winter power and heat

• How long will a power station run my refrigerator? Hours for any of 5,159 ENERGY STAR fridges and freezers on a 500 to 3,000 Wh power station.
• How much does a space heater cost per month in my state? 21 heaters on high and low, at August 2026 EIA prices for every state.
• How much does a heated mattress pad cost per night? Sunbeam blanket and pad watts, cost per night, and the gap to a space heater.

Also for the home: Will a robot vacuum fit under my sofa?

Air quality

• What size dehumidifier for a 1,500 sq ft basement? ENERGY STAR's sizing chart in today's pint ratings, and every certified portable model of 20 pints or more.
• What size dehumidifier for a crawl space? The 2018 IRC figure of 70 pints per 1,000 sq ft, and every ENERGY STAR whole-home unit with the area it covers.
• Air purifier electricity cost running 24/7 Top-speed watts and monthly cost of all 187 ENERGY STAR air purifiers, in every state, with a room-size filter.

Car and camping

• How long will a 12V fridge run on a car battery? Hours on lead-acid and lithium batteries for 9 Dometic CFX fridges, from Dometic's own average draw.
• Cost to charge an EV at home per month, every state EPA kWh per 100 miles for 80 current electric models times EIA state electricity prices.
• Power station car charging time: 18 models Car socket input and maker-stated car charging time of 18 power stations from EcoFlow, Jackery, Anker SOLIX and BLUETTI, with a drive-time calculator.

Cooling

• Will a window air conditioner fit my window? Cabinet sizes of every ENERGY STAR window unit, plus maker minimum window sizes.
• Does a window air conditioner need a dedicated circuit? Cooling amps from maker spec sheets checked against the code's 80% and 50% limits.

Fitness

• Exercise bike weight limits: 19 bikes compared Maker-stated maximum user weight of 19 current exercise bikes from 11 makers, 250 to 400 lb, with rider fit, footprint and a weight check.
• Folding treadmill folded dimensions: 23 models Folded length, width and height of 23 folding treadmills from Horizon, Sole, Sunny, Echelon, XTERRA and Bowflex, with a fit check for your parking spot.

Heating

• How many space heaters can run on one 15 amp circuit? Amps for 21 heaters on high and low, and how many fit a 15 or 20 amp circuit.
• Kerosene vs propane vs electric heater: cost per hour Cost per 10,000 BTU at EIA propane prices for 38 states, plus the kerosene price that beats both.
• What size garage heater do I need? 18 heaters BTU and watts for your garage size and winter low, with the rating, wiring and coverage claim of 18 electric and gas garage heaters from Dr. Heater, Fahrenheat, King, Modine and Mr. Heater.

Kitchen

• Air fryer and microwave on the same circuit: amps for 14 air fryers Maker-stated watts and amps for 14 Cosori, Ninja and Hamilton Beach air fryers, microwave input power, and what Panasonic and GE say about sharing a circuit, with a checker for your pair.

Laundry

• Garment steamer watts and heat-up time: 23 models Maker-stated watts, heat-up time, tank and steam time per fill for 23 Rowenta, Steamfast, Hamilton Beach and Jiffy steamers, with a picker for your session length.

Outdoor

• Patio heater size: what each heater is rated to cover Maker-rated heat area of 22 gas and electric patio heaters, the BTU per square foot each rating implies, and how many your patio needs.

Pets

• Cat water fountain filter cost per year Yearly filter cost for 8 filters from PETLIBRO, PetSafe, PETKIT and Catit, from each maker's own prices and intervals.

Sleep

• Bed cooling system electricity cost: 11 models Maker-stated watts and monthly cost of Chilipad, Eight Sleep Pod, BedJet and bFan systems in every state, with a two-sleeper option.

Smart home

• Smart lock battery life: 11 locks, as stated Maker-stated battery life of Schlage, Kwikset, Ultraloq, Aqara, Lockly and Level smart locks, Wi-Fi and non-Wi-Fi versions side by side, with battery changes per year.

Water

• Under sink water filter dimensions: will it fit? Height, footprint, tank and power needs of 11 under sink filters and reverse osmosis systems, with a fit check for your cabinet.