HVAC
Filter changes, thermostat setup, seasonal maintenance, and duct cleaning.
15 guides
Easy45 minHow to Install a Smart Thermostat
A smart thermostat is one of the highest-ROI upgrades you can make to your home — it learns your schedule, adjusts automatically when you're away, and typically saves about 8% on heating and cooling bills — the figure ENERGY STAR verifies from real-home data, roughly $50 a year — so the $120-250 device usually pays for itself within a few years. If your old thermostat has labeled wires behind it, the swap takes about 30-45 minutes with nothing more than a screwdriver and your phone. This guide covers checking compatibility, labeling wires, mounting the new base, connecting everything, and walking through the app setup so your system is running smart the same day.
Easy10 minHow to Change Your HVAC Filter
A clogged HVAC filter forces your system to work harder, raising energy bills by 5-15% and shortening equipment life — and a replacement filter costs just $5-25. Changing it takes under 5 minutes with zero tools, yet it's the single most neglected piece of home maintenance. This guide shows you how to find your filter, pick the right replacement, install it correctly, and set a schedule so you never forget again.
Medium3 hrsHow to Seal Entry Points and Keep Mice Out
A mouse needs a gap only 1/4 inch wide — the width of a dime — to move into your walls, and every fall they try. One afternoon with copper mesh, caulk, and hardware cloth closes off the routes they actually use, for $30-80 in materials against the several hundred dollars an exclusion company charges for the same work. This guide covers finding the gaps the way an inspector does, choosing materials mice cannot chew through, and the trap-first rule that keeps you from sealing mice inside the house.
Medium3 hrsHow to Balance Uneven Room Temperatures
If your bedroom runs 8 degrees colder than the living room or the upstairs cooks while the basement freezes, you can fix most of it in an afternoon without calling a pro. This guide walks you through diagnosing the problem, adjusting vents and trunk dampers, sealing duct leaks, and rebalancing airflow — the same process an HVAC tech would charge $750–$2,000 for.
Medium10 hrsHow to Insulate an Attic
Adding attic insulation is the highest-payback weatherization project in most homes — but the step that actually saves money is the one DIYers skip: air-sealing the leaks before any insulation goes down. This guide does it in the right order — seal the penetrations and hatch, add baffles so you don't smother the soffit vents, keep insulation safely clear of recessed lights and the flue, then build the floor up to your climate zone's R-value target with batts or blown-in. Budget roughly $1 to $2 per square foot in materials and a weekend.
Medium4 hrsHow to Seal and Insulate Ductwork
Leaky, uninsulated ducts in crawlspaces, basements, and attics leak 20-30% of your heated and cooled air before it ever reaches a register — that is money pouring out of joints and seams every time the system runs. Sealing leaks with mastic and wrapping ducts in R-8 foil-faced insulation is a weekend project that costs $80-150 in materials and typically pays itself back in a single heating or cooling season through lower energy bills.
Easy45 minHow to Replace a Thermostat (Non-Smart)
A faulty or outdated thermostat can cause uneven temperatures and inflate your energy bill by 10-20%. Swapping it for a new programmable or basic digital thermostat is a 30-minute job that requires only a screwdriver and costs $20-50 for the part. This guide walks you through safely disconnecting the old unit, labeling wires, mounting the new thermostat, and verifying your HVAC system responds correctly.
Easy4 hrsHow to Insulate Exposed Pipes for Winter
A burst supply line dumps several hundred gallons an hour into a crawl space, and the insulation that would have prevented it costs about a dollar a foot. This guide covers the part most winter-prep advice skips: how to size foam sleeves to the actual outside diameter of your pipe, miter the corners so elbows are not left bare, seal the seams, and add heat cable safely on the runs that freeze every year. Half a day and $40-120 for a typical crawl space.
Medium2 hrsHow to Clean Air Ducts Yourself
Dust, pet dander, and debris build up inside your ductwork over time, and cleaning the accessible sections near each register cuts down on dust that gets stirred back into rooms. The EPA does not recommend routine, calendar-based duct cleaning — clean when you can actually see buildup at the vents, not on a fixed schedule. Professional duct cleaning runs $300-500, but you can tackle the accessible sections yourself in about two hours with a vacuum, a brush, and a screwdriver. This guide walks you through removing vents, loosening buildup, vacuuming debris, and replacing your filter so your system runs cleaner and your air feels fresher.
Easy1h 15mHow to Replace Weatherstripping on an Exterior Door
If you can see daylight around a closed front door, you are heating and cooling the yard — and worn weatherstripping is almost always the reason. Replacing the jamb seal and the door sweep runs about $15 to $60 in parts and takes an hour, which is a rounding error next to the cost of a new door. This guide covers the four weatherstrip types and how to tell which one your door uses, how to measure and fit each, how to set the compression so the door still latches, and the geometry problem that no amount of new sealing will fix.
Easy45 minHow to Program a Smart Thermostat
A properly programmed smart thermostat can cut your heating and cooling bills by 8-10% — roughly $50-150 per year — without sacrificing comfort. Most homeowners never get past the default settings, leaving serious savings on the table. This guide walks you through the full setup: Wi-Fi connection, schedule creation, and energy-saving features like geofencing and eco mode.
Easy45 minHow to Install a Window AC Unit
A window air conditioner can cool a room for a fraction of the cost of central AC — units start at $150 and installation takes about 30 minutes with no special tools. But a poorly installed unit wastes energy, leaks water inside, or worse, falls out the window. This guide walks you through measuring your window, positioning and securing the unit, sealing gaps for maximum efficiency, and testing the drainage so you stay cool all summer without surprises.
Medium45 minHow to Troubleshoot a Furnace That Won't Start
When a gas furnace won't fire, the cause is usually something simple and free to fix — a thermostat set wrong, a flipped power switch, a filter clogged solid, or a sooted flame sensor — not a dead furnace. This guide walks the checks in order of likelihood, starting with gas safety, so you can get the heat back in about 45 minutes without a $150 service call. It also draws a clear line at the repairs that are genuinely a pro's job.
Easy1 hrHow to Clean and Maintain a Mini-Split
A ductless mini-split is the lowest-maintenance heating and cooling there is — right up until the filters mat over, the coil grows a musty film, and the drain line clogs and drips water down your wall. Twenty minutes of cleaning every few weeks during cooling season, plus one deeper pass each spring, keeps the air clean, the efficiency you paid for, and the mold out. This guide covers the whole routine for about $0-30 in supplies, and is honest about the two jobs (refrigerant and a moldy blower wheel) that belong to a pro.
Easy45 minHow to Seal Drafty Windows
Drafty windows can add 5-30% to your heating and cooling bills — the U.S. Department of Energy estimates that a comprehensive home weatherization project (which includes sealing windows, doors, and other air leaks) can save homeowners several hundred dollars per year on energy costs. Window sealing alone typically pays for itself within a few seasons through lower heating and cooling bills. The good news is that most drafts are fixed with $10-30 in weatherstripping and caulk, not expensive replacement windows. This guide walks you through finding the leaks, choosing the right sealant for each gap, and applying it for a tight, long-lasting seal.