The Vitherma blog
Guides for a Comfortable Home
28 plain-English guides on heaters, cooling, kitchen gadgets, pets and sleep, each researched from official sources. Start with the guide at the top of each topic.
Home Comfort
Portable heaters, coolers and the small-room setups that make a house feel right in any season.
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The Complete Guide to Home Comfort: Portable Heaters & Coolers That Actually Work
Pick the right portable heater or cooler by room size, insulation, noise and budget: a simple framework for matching the machine to the room.
Plug-In Wall Heaters: How They Work and What to Check Before You Buy
How plug-in wall heaters work, who they suit and 7 things to check before you buy: overheat protection, tip-over shut-off, timer, voltage and guarantee.
Best Space Heater for a Home Office or Under a Desk
Best space heater for a home office or under a desk: what to look for, why beside the desk beats under it, and two plug-in heaters for the desk or the room.
Why Is One Room Always Colder? 7 Causes and Fixes
Why one room stays colder than the rest of the house: 7 causes from the DOE (drafts, blocked vents, ducts, cold spaces), a fix for each and a 10-minute check.
Space Heater vs Central Heating: When Does Zone Heating Save Money?
Space heater vs central heating: a room heater pays off when you do not need to heat the whole house. See which homes save most and which heater fits.
Do Space Heaters Dry Out the Air? Humidity and Winter Comfort
Do space heaters dry out the air? They lower relative humidity, not the water in it. See how much, the 30-50% range the EPA advises and the easy fixes.
Winter-Ready Home: Heating Setup Checklist, Room by Room
Get your home ready for winter: furnace checkup, drafts and thermostat settings first, then the right heater and the right spot for every room in the house.
Do “Ventless” Portable Air Conditioners Really Work?
Ventless portable ACs give real relief where you sit. How they work, when they shine, how to choose one and the two personal coolers worth a look.
Where to Put a Space Heater to Warm a Room Faster
Where to put a space heater so the room warms faster and stays comfortable: the best spot, open floor, doors and curtains, and a tip for every room.
Ceramic vs Infrared Heaters: What's the Real Difference?
Ceramic vs infrared heaters: how each one moves heat, when infrared is worth the higher price, and when a plain ceramic wins. Pick by drafts and room.
Best Energy-Efficient Heaters for Small Rooms (Under 200 sq ft)
How to size an energy-efficient heater for a closet, office or bedroom under 200 sq ft: the watts-per-square-foot rule, running costs and the 15-amp limit.
How Much Electricity Does a Space Heater Really Use?
A 1,500W heater costs about $0.27/hour at 2026's average rate. Real per-hour, per-night and per-month costs by wattage, plus what actually cuts the bill.
Space Heater at Night: How to Warm Your Bedroom Before Bed
How to use a space heater at night: warm the bedroom 30 to 60 minutes before bed, set the thermostat and timer, and pick the features that make it easy.
Home & Kitchen
Cleaning and kitchen gadgets, researched and vetted before they get a recommendation.
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Home Cleaning & Kitchen Gadgets: The First Five Worth Your Money
Jenny's first look at five home cleaning and kitchen gadgets, researched from makers' pages and buyer reports: what each is best for and which are worth it.
Hard Water Stains on Glass: How to Clean Shower Doors and Windows Without Harsh Chemicals
Hard water stains on glass are dried minerals. See what USGS and UGA Extension say, how to clean shower doors and windows with vinegar and keep spots away.
Cordless Vacuum Sealers: How They Work and What to Check Before You Buy
How a cordless vacuum sealer works, what university extension services say about it, the habits that go with one and six checks to make before you buy.
Plug-In Pest Repellers: How They Work and What to Check Before You Buy
How plug-in pest repellers work, what the EPA and University of Arizona Extension say about them, the habits that go with one and seven checks before you buy.
Hydrogen Water Bottles: How They Work and What to Check Before You Buy
How hydrogen water bottles work, what the hydrogen number means and seven checks before you buy, from the FDA, a 2021 lab study and Medical News Today.
Wood, Plastic or Titanium: How to Choose a Cutting Board
Wood, plastic or titanium cutting board? What the USDA says about each material, how to clean it, when to replace it, and where Vanotium and Katori fit.
How to Wash Fruits and Vegetables: What the FDA and CDC Recommend
Wash fruits and vegetables the way the FDA and CDC advise: rinse under running water, scrub firm produce, skip soap, dry and chill. Plus where a gadget fits.
Pets
Training gear compared honestly, with real trade-offs between handheld tools and collars.
Why Does My Dog Bark at Night? Causes and Training Options
Why does my dog bark at night? Six common causes, a quick way to find yours, a calm bedtime routine and where a handheld trainer like WoofAway fits.
Keeping Dogs and Cats Warm in Winter Without Heater Risks
Keep dogs and cats warm in winter with a bed off the floor, no drafts, a coat for short-haired dogs and safe heater rules from the ASPCA, AVMA and CPSC.
Space Heaters With Pets and Kids: Setup Rules That Matter
Space heater with pets and kids at home? Keep a 3-foot kid-free zone, plug straight into the wall and switch it off when you leave. The setup rules that matter.
Handheld Trainer vs Anti-Bark Collar: Which Fits Your Dog?
WoofAway handheld ultrasonic trainer vs an anti-bark collar like NooBark, how they differ, real specs, and which fits your dog.
Sleep Comfort
Pillows and the bedroom setup that decides whether you actually stay asleep, starting with side sleepers.
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Best Pillow for Side Sleepers: The Four Things That Actually Decide It
How to pick a pillow if you sleep on your side: loft, the shoulder gap, contour shapes, foam heat, and the mistakes that keep waking you up at 3 a.m.
Sleeping Hot: Why It Happens and What Helps
Waking up hot? See why your body overheats in bed and what the Sleep Foundation, Cleveland Clinic and a peer-reviewed review say helps: room, bedding, pillow.
Side Sleeper Neck and Shoulder Pain: What Actually Helps
Waking up with neck or shoulder pain on your side? See what Harvard Health, Cleveland Clinic and the Sleep Foundation say about pillow height and position.
Best Bedroom Temperature for Sleep: What the Research Says
The best bedroom temperature for sleep is about 65 to 68°F. See what the research says, how age and bedding change it, and how to get your room there tonight.