Heater Guides is a hands-on resource for homeowners. We break down space heaters, water heaters, fireplaces and HVAC systems into plain-English buying guides, real reviews and step-by-step fixes — so you pick the right unit and keep it running.
Three routes into the site. Pick the one that matches where you are right now — shopping, fixing, or just trying to understand how the thing works.
Sizing charts, honest reviews and head-to-head comparisons so you buy once and buy right.
See all heater typesSymptom-first troubleshooting: no hot water, pilot won’t stay lit, leaking tank, tripping ECO.
Browse all fixesHow convection, radiant and infrared heat actually differ — and which one suits your room.
Explore the basicsNine core categories cover almost every question we get asked. Each hub collects the reviews, sizing advice and repair walkthroughs for that type of unit.
938 guides
Portable and plug-in heat for any room
326 guides
Tanks, sizing, repairs and warranties
299 guides
Ambience plus real supplemental heat
308 guides
The most efficient way to make hot water
114 guides
Endless hot water, sized correctly
105 guides
Vented, unvented and safety essentials
75 guides
Off-grid, garage and job-site heating
176 guides
Free heat once the panels are paid for
50 guides
Automate comfort and cut the bill
Newly published and recently updated, so the specs, prices and part numbers still match what is on the shelf.
You are looking at a 10,000 BTU window unit that claims to cool up to 450 square feet. It also talks about working with Alexa, having Wi-Fi controls, and being energy efficient.…
You step into the shower expecting a steady stream of hot water. Instead, you get a lukewarm trickle…
The Midea 8,000 BTU Smart Inverter Air Conditioner is one of the most versatile window units I've tested,…
You step into the shower expecting a steady stream of hot water. Instead you get a lukewarm trickle…
If you are shopping for a 10-gallon electric water heater, two names keep coming up: VEVOR and GE…
You need hot water in a place where a full-size tank won't fit. Maybe it's a small apartment…
If you live in a small apartment, a tiny house, or a workshop where a full-size water heater…
Every guide on Heater Guides starts with a real problem in a real house: a cold basement, a tank that runs out mid-shower, a garage that never gets above 50°F. We buy or borrow the units, run them, take them apart when they fail, and write down what we learn.
Where a job crosses into gas, venting or electrical work that needs a permit, we say so plainly instead of pretending everything is a weekend DIY.
Meet the teamThe problems homeowners search for most, each with a symptom-by-symptom walkthrough.
A good rule of thumb is 10 watts of electric heat per square foot of floor space in an average, insulated room — so a 1,500-watt heater comfortably handles about 150 sq ft. Add 20–30% for high ceilings, poor insulation, a basement or a garage, and subtract if the room is already served by central heat.
Electric resistance heaters are 100% efficient at the unit but electricity usually costs more per unit of heat than natural gas, so gas is normally cheaper to run where a gas line already exists. Electric wins for a single room, for zoned use where you heat only the space you occupy, and when the alternative is running a whole central system.
The three usual causes are an undersized tank for the household, a failed lower heating element or thermostat, and sediment build-up that steals tank capacity. Our troubleshooting guides walk you through telling them apart in a few minutes with nothing more than a multimeter and a bucket.
No. We choose what to cover ourselves, and no brand pays for a placement or a rating. Heater Guides earns a commission when you buy through some of our links, at no extra cost to you — that is what keeps the guides free.
Many electric units are a genuine DIY job if you are comfortable with a breaker panel and can follow clearance requirements. Anything that involves gas piping, venting a combustion appliance, or altering a flue should be signed off by a licensed pro — the safety guides on this site tell you exactly where that line sits for each type.
Start with our sizing and buying guides — they walk you from square footage to the exact wattage, BTU and fuel type that makes sense for your space.
