You just moved into a smaller place. Maybe it's a one-bedroom apartment, a condo, or a back unit in a duplex. The good news: less square footage usually means lower utility bills. The bad news: the first winter bill arrives and the water heating line item looks almost the same as it did at the old house.
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That's normal, and it's fixable. Water heating is typically the second-biggest energy expense in a US home, and in a small household it can be the single largest one, because you're paying to keep a tank of water hot around the clock whether you use it or not.
If this helped, you'll also want to read How to Reduce Water Heater Costs (5 Easy Wins), How to Save Water and Lower Your Bill (15 Real Changes) and How to Find What Uses the Most Electricity in Your Home.
There's a second problem that rarely gets mentioned in energy-saving articles, and it matters more when you share walls, floors, or ceilings with other people: noise. The cheap fixes people recommend most often — running the dishwasher at night, doing laundry late, taking long showers at odd hours — all make noise. Water heaters themselves can hum, pop, or rumble. If you're in an apartment or a townhouse, your money-saving routine can turn into a neighbor complaint or a 2 a.m. wake-up.
This guide walks through what actually lowers the bill, in the order that costs the least, and flags which steps are quiet and which ones you should keep to daytime hours.
Start by finding out what you're actually paying
Before changing anything, get a baseline. Your utility bill usually shows a separate line for gas or electricity, but it rarely breaks out water heating specifically. A typical electric resistance water heater draws around 4,000 to 4,500 watts when the element is running, though the duty cycle (how often it actually runs) varies a lot by household size and tank insulation. A gas unit is usually in the 30,000 to 40,000 BTU/hr range.
If you want a real number rather than a guess, a plug-in power meter like the P3 P4460 Kill A Watt EZ works for electric units that plug into an outlet (not hardwired ones). It logs cumulative kilowatt-hours, so you can see what a week of normal use costs. Reviewers often mention using it to compare appliances against each other, which is exactly the right use case.
For most renters and small-home owners, though, the practical version of this step is simpler: pull three months of bills, note the seasonal swing, and treat the winter number as your target. Then work down the list below and check the bill again next month.
Turn the temperature down — the cheapest win there is
Water heaters ship set around 140°F. Most households never need more than 120°F. The Department of Energy has recommended 120°F for years, and it's the single easiest change on this list.
Lowering the setpoint by 20°F typically cuts water heating energy use by somewhere in the range of 5 to 10 percent, though the exact figure depends on your tank, your usage, and your climate. On a $400-a-year water heating bill, that's real money for turning a dial.
Two things to know:
- Gas water heaters have a dial on the front of the tank, usually marked with words like Warm, Hot, and Very Hot rather than numbers.
- Electric water heaters often have two thermostats under access panels, and you'll need a screwdriver and the breaker off to reach them.
If you're not comfortable opening an electric water heater's panels, call it in. The savings aren't worth a shock.
Noise note: this step is completely silent, and it's the one change that helps without disturbing anyone. Do it first.
Fix the shower, not just the habit
Long showers are the biggest single driver of water heating in most small households. A standard showerhead flows about 2.5 gallons per minute. A WaterSense-labeled low-flow head runs at 2.0 GPM or less. Cutting 0.5 GPM off a ten-minute shower saves five gallons of hot water every time.
A few models get mentioned consistently in owner reviews for keeping decent pressure despite the lower flow. The Delta H2Okinetic uses a shaped spray pattern rather than a simple restriction, which is the usual reason reviewers say it doesn't feel weak. The Niagra Earth Massage is a much cheaper option with a flow-control valve built in, and reviewers frequently note it's a good fit for rentals because it installs with hand tools.
One honest caveat: some low-flow heads produce a higher-pitched spray sound than the old one did. It's usually not loud, but if your bathroom shares a wall with a bedroom, it's worth knowing before you buy.
Shorter showers without a fight
Household size matters here. If you live alone, you control the whole variable. If you've downsized with a partner or a kid, you don't.
The most effective low-cost version is a timer, not a lecture. Five minutes is plenty for most showers. A cheap kitchen timer on the bathroom counter works as well as anything.
For a quieter household routine, consider shifting showers earlier in the evening rather than right before bed. Running the shower at 10 p.m. in an apartment building often means the sound of water in the pipes travels to the unit below, and the water heater itself may kick on and be audible through a shared wall or closet.
Wash clothes cold and dry smarter
Washing machines use most of their energy heating water, not running the motor. Switching to cold water for every load except genuinely soiled items is one of the highest-return, lowest-effort changes you can make. Consumer guidance consistently puts the savings at a meaningful fraction of laundry energy use, and modern detergents are formulated for cold cycles.
Air drying is the free version. It's also the quiet version — no dryer tumbling at 11 p.m. A folding rack like the Honey-Can-Do Foldable Drying Rack is the standard recommendation for small spaces because it collapses flat when not in use. Reviewers commonly mention using it for delicates and workout clothes rather than full loads, which is realistic for a small apartment.
If you do run the dryer, run it during the day. Dryers are among the loudest appliances in a home, and in a shared building they're a frequent source of complaints.
Insulate the tank and the pipes
If your water heater lives in an unconditioned space — a garage, a basement, a utility closet — it's losing heat all day. An insulating blanket on the tank and foam sleeves on the first few feet of hot and cold pipes are inexpensive and can meaningfully reduce standby loss, particularly on older tanks.
Check the manufacturer's guidance first. Many newer tanks have insulation built in, and some manufacturers warn against adding a blanket because it can block vents or the thermostat access panel. If yours says not to, don't.
This step is silent. Nothing about it will bother a neighbor.
Look at your actual usage pattern
Standby loss is the enemy in a small household. A 40- or 50-gallon tank keeps that water hot whether you're home or not. If you travel often, or you're a one-person household, you're paying to heat water nobody uses.
Some things that help:
- Take showers back to back rather than spread across the day, so the tank reheats once instead of three times.
- Run the dishwasher only when full.
- If you have a recirculating hot water pump, put it on a timer or a manual switch. These pumps are convenient but they cycle hot water through the pipes continuously, and they're a known energy drain.
That last one is also a noise source. Recirculation pumps hum, and in a small home the sound carries.
What about smart plugs and timers?
For a hardwired water heater, no. A plug-in smart plug can't handle the amperage, and you should never put one on a 240V circuit.
For the smaller stuff around the water heating system — a dehumidifier in a damp basement, a recirculation pump on a plug, a space heater in a cold bathroom — a smart plug can at least stop you from paying for something that's running when it shouldn't be. The Kasa Smart Plug HS103 is a widely reviewed option with scheduling built in, and the Amazon Smart Plug is the straightforward pick if you already use Alexa. Both are rated for 15 amps and standard household loads — not water heaters.
Noise-wise, a smart plug doesn't make sound itself, but scheduling a pump or dehumidifier to run at 2 a.m. is exactly the kind of thing that gets a noise complaint in a shared building. Schedule daytime instead.
The quiet-hours rule for shared walls
If you take one thing from this article, take this: the money-saving habits that involve running appliances are the ones that create noise, and the quietest hours for you are often the loudest for your neighbor.
A simple rule that works in most apartments and townhouses:
- Water heating adjustments, insulation, and low-flow showerheads: any time.
- Showers: before 9 p.m. if you share walls or floors.
- Laundry, dishwasher, dryer: daytime only.
- Recirculation pumps, dehumidifiers: daytime only.
Nobody has ever been complained about for turning down a thermostat.
The bottom line
Lowering a water heating bill cheaply comes down to three things: turn the temperature down to 120°F, use less hot water (shorter showers, cold washes, a low-flow head), and stop paying to keep water hot when you're not using it. Almost all of that is free or under $50, and almost all of it is silent.
The expensive fixes — a new water heater, a heat pump unit, a tankless system — are worth considering eventually, but they're not what this article is about, and in a small home the cheap changes usually capture most of the available savings anyway. Start with the dial. Check the next bill. Then decide whether anything else is worth doing.
Frequently Asked Questions
How much can I actually save by turning my water heater down?
Lowering the setpoint by about 20°F typically cuts water heating energy use by roughly 5 to 10 percent, depending on your tank and usage. On a $400-a-year water heating bill, that's a meaningful chunk for turning a dial.
Will a low-flow showerhead make my shower louder?
Sometimes. Some low-flow heads produce a higher-pitched spray than a standard one, though it's usually not loud. If your bathroom shares a wall with a bedroom, that's worth knowing before you buy.
Can I put a smart plug on my water heater?
No. Water heaters draw far more power than a standard smart plug is rated for — typically around 4,000 to 4,500 watts for an electric unit — and most are hardwired anyway. Smart plugs like the Kasa Smart Plug HS103 and Amazon Smart Plug are for ordinary household loads only.