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HVAC FAQs
Most systems have a lifetime of 10 to 20 years. As your equipment gets older, its efficiency can decrease dramatically. You may notice that it gets noisier and needs repairs more often. When a unit begins to show its age, you have two choices. You can overhaul the system or replace it. Because heating and cooling technologies improve over time, a new system designed with newer, more energy-efficient equipment makes sense, especially if your system is 10 or more years old. We can estimate the cost of a new system as well as a payback schedule that will show you how newer technology will pay you back in lower energy usage.
No. Replacing only the outdoor unit will lower the efficiency of the unit. In fact, you can lose up to 15% of the unit's efficiency! Even worse, your system may fail sooner than normal and most manufacturers' warranties will be voided. You should always replace the indoor cooling coil with the outdoor unit.
No, you don't want your air conditioner to be too big. Air conditioners control the comfort level in your home by cooling the air and by removing humidity. An oversized air conditioner will cool your home faster, but it will use more energy and will not remove humidity adequately.
A unit that is too big for your home will have short run cycles. It may take only a short time to cool the air, but the unit shuts off before enough air blows across the indoor coil where moisture condenses into water and drains from your system. Too much moisture left in the air can lead to mold and mildew problems.
These short run cycles also mean your system starts and stops more often which uses more energy and causes a lot of wear and tear. An air conditioner operates more efficiently during long run cycles.
The same holds true with heating systems. An oversized furnace will warm the house quicker, but it uses more fuel and causes greater temperature swings in the home.
A matched system is important for a variety of reasons. One is comfort. When all your components are properly sized for your home, you can control exactly how much heating or cooling you need so you can relax. Also, a properly sized matched system enables every component to perform as designed, meaning proper cycle times are maintained, humidity is controlled, and system sound is minimized.
Another reason matched systems are important is efficiency. Most systems people buy are too large for their homes, which uses more energy than needed for your home. A matched system outlined by a dealer who has completed a load calculation for your home provides just the right amount of heating and cooling you need so you get the most value for your utility dollar.
At the risk of telling you something you're tired of hearing, replace the air filter in your furnace on a regular basis. Dirty air filters reduce the amount of air flowing through a system and make the furnace work harder to maintain the temperature. How often you change the filter depends on the type of filter you use, if you have pets, and the size of your equipment. Please give us a call and we can give you proper guidance.
Proper air filtration is just as important to the health of your heating and cooling system as it is to the health of your family. Without proper filtration, dust and dirt can build up on your system which impacts operation and efficiency. A high-efficiency filter will remove more dust, dirt, pollen, mold, and other particles from the air. If you suffer from allergies or other respiratory problems, you should strongly consider a high-efficiency filter. No matter what type of filter you have, make sure you change it regularly.
Yes. Keeping your system properly maintained will lower energy and repair costs, prevent breakdowns, and prolong the life of your equipment. Neglecting necessary maintenance ensures a steady decline in air conditioning performance while energy use steadily increases.
Without warranty coverage, a breakdown can mean significant expenses in parts, labor, or both. However, with one of our service agreements, you avoid that unexpected significant expense. While no warranty can guard against every possible problem, we can explain the broad range of protection our service agreements afford.
With a high-efficiency air cleaner, you can remove up to 99% of the pollen and spores that find their way into the home. There is also a great reduction in household dust, dirt, smoke, and other air pollutants. Your indoor air will become cleaner and fresher while reducing the allergens and dust that circulate throughout the house. With a whole-house humidifier, you can relieve the irritating discomfort of dry indoor air. The humidifier reduces itchy skin, scratchy throats, static electricity, and damage to your furnishings and woodwork. Since humid air feels warmer than dry air, you do not have to set the thermostat as high to feel the comfort you want. A lower thermostat setting will reduce the costs of your energy bill.
Molds are part of the natural environment. Outdoors and molds play a part in nature by breaking down dead organic matter, such as fallen leaves and dead trees, but indoors, mold growth should be avoided. Molds reproduce through tiny spores; the spores are invisible to the naked eye and float through outdoor and indoor air. Mold may begin growing indoors when mold spores land on surfaces that are wet. There are many types of mold, and none of them will grow without water or moisture. Click here to learn more about mold prevention in your home from the EPA.
When humid air passes over chilled cooling coils, water condenses and drips through the coils into a collection pan, from which it continuously drains. Problems with these systems may occur when this water collects and becomes stagnant when blocked, either on the coils or in the drip pan. The pan will grow mold that can quickly infect your home with dangerous mold spores. Problems also exist when the HVAC ducting contains microscopic mold spores that stay continually present and blow contaminants around the house which are caused by mold in other parts of your home.
You can do 3 things to prevent mold growth in your system:
- Preventative maintenance will ensure that the collection pan under the indoor coil stays clean and clog-free.
- Install ultraviolet lights next to the cooling coils to kill any mold or bacteria growing on the coils or collection pan.
- Keep your ductwork clean, and use a high-efficiency filtration system to keep your entire HVAC system clean.
SEER, AFUE, and HSPF are all measures of energy efficiency. Air conditioners may look similar, but their Seasonal Energy Efficiency Rating (SEER) can vary widely. Higher SEER numbers save more money spent on electricity. A 13 SEER air conditioner, the EPA "current minimum standard," uses 23% less energy than a 10 SEER unit (EPA standard up until Jan. 2006). Even though 13 SEER is the minimum efficiency available, we currently offer a line of air conditioners that start at 13 SEER and go all the way up to 21 SEER. Depending on your average usage, higher SEER air conditioners can significantly reduce your electric bill.
Heat pumps have SEER ratings like air conditioners and Heating Seasonal Performance Factor (HSPF) ratings for measuring heating efficiency. Higher HSPF ratings mean greater energy savings. The HSPF scale range is 7.5 to 13.0.
Today's new high-efficiency furnaces can save up to 50% in operating costs over a ten-year-old furnace. Many 1990 and earlier model furnaces have Annual Fuel Utilization Efficiency (AFUE) ratings of 65% or less. The minimum AFUE-rated furnace that can be sold in the United States as of May 1, 2013, is 80% in southern states and 90% in northern states.
Our current product offering starts at this minimum AFUE rating and goes all the way to a very efficient 98.3% AFUE rating. Depending on your average usage, higher AFUE-rated furnaces can significantly reduce your gas bill.
Cooling
- Upgrade to a high-efficiency air conditioner: Swapping your old, inefficient air conditioning system for a high-efficient one can cut electricity bills by one-third. Consult one of our professional technicians to ensure your system is the right size for your home, and you aren't over- or under-cooling for your space needs.
- Turn up the temperature: To save electricity during the summer, set the temperature above 75° as every degree below this will add an extra three to five percent to your energy bill.
- Install ceiling fans: Change the direction of airflow on your ceiling fans. In the summer, the blades should operate in a counter-clockwise direction as a way of creating a nice, gentle wind.
- Have an annual maintenance performed: Having an annual maintenance performed on your air conditioner by a licensed technician will help ensure it operates at its peak efficiency and catches any potential breakdowns before they occur.
- Don't block vents in well-used rooms: Keep your supply and return air vents free of objects like blinds, carpets or furniture so your air conditioner can operate efficiently and there is even cool air distribution.
Heating
- Upgrade to a high-efficiency furnace: New high-efficiency furnaces use up to 50% less fuel than an older system. It can save you up to 25 percent of your home-heating costs in one year, and within a few years, you'll have recovered the initial cost of replacing/upgrading your furnace. Choosing a model with an energy efficient motor can save 20 to 50 percent of the energy needed to continuously operate a fan motor. Let us show you the advantages of replacing your old furnace today.
- Have an annual maintenance performed: Having an annual maintenance performed on your furnace by a licensed technician will help ensure it operates at its peak efficiency and catches any potential breakdowns before they occur.
- Install a programmable thermostat: A programmable thermostat enables you to control your home's temperature when you're away or asleep. For every 1° you lower your thermostat for seven hours per day, you save one percent on your heating bill.
- Don't block vents in well-used rooms: Keep your supply and return air vents free of objects like blinds, carpets or furniture so your furnace can operate efficiently and there is even heat distribution.
- Install ceiling fans: Change the direction of airflow on your ceiling fans. In the winter, the blades should operate in a clockwise direction helping to push the warm air from the ceiling down into the room.
The average home spends about $1,900 annually on energy bills. Heating and cooling accounts for as much as half of a home's energy use. The EPA provides important recommendations for energy-efficient equipment, including proper sizing, quality installation and maintenance, and other home improvement considerations to help you get the most out of the heating and cooling products you purchase, save energy, and save as much as 20% annually on your total energy costs.
ENERGY STAR® qualified products prevent greenhouse gas emissions by meeting strict energy efficiency guidelines set by the U.S. Environmental Protection Agency (EPA) and the U.S. Department of Energy (DOE).
Heat pumps are a great solution for your home comfort system because they work to provide both heating and cooling. Heat pumps have SEER ratings like air conditioners and Heating Seasonal Performance Factor (HSPF) ratings for measuring heating efficiency. Higher SEER and HSPF ratings mean greater energy savings.
Heat pumps are a very efficient alternative to electric heat. A heat pump works the same as an air conditioner in the summer, but it runs in reverse in the winter to heat your home. The system will be matched with a backup heating source, most often electric heat for those extremely cold days of winter.
With a traditional heating and cooling system, you had to use less if you wanted to save more. A hybrid heat system combines the benefits of intelligent control for gas and electric heating to create an intuitive system that reacts to changing conditions.
No matter what the temperature is outside, a Hybrid Heat system will automatically select the most efficient fuel source for your home, which means you'll stay warm in the winter, cool in the summer, and save money all year.
To design a Hybrid Heat system for your home, we professionally match one of our heat pump units with a natural gas furnace. Contact us to see how much energy you can save over your existing system.
The Earth absorbs almost 50% of all solar energy and remains a constant temperature of 50°F to 70°F depending on geographical location. A geothermal unit utilizes this constant temperature for heating and cooling your home. You can save up to 60% on your power bills compared to a traditional system. There is no flame, no flue, no odors and no loud outdoor equipment. Heating, air conditioning, and hot water can all be attained from a single compact unit.
Variable-speed fans operate on a simple principle: they can spin at different speeds depending on the heating and cooling needs of your home. Usually, they operate at lower speeds, delivering a steady, reliable stream of warm or cool air to your home. This helps control humidity levels, utility costs, and system noise. When conditions become more extreme, the fan speed increases so that the system can meet increased demand, guaranteeing that your comfort needs will be met on even the hottest days or coldest nights.
2-stage cooling is a method of cooling that can better manage the cooling of your home while outdoor temperatures are changing. It can also better maximize indoor comfort and energy efficiency. 2-stage cooling systems are typically the most energy-efficient systems out there.
2-stage cooling can be done by having one unit with two compressors, one small and one large. The small one is typically capable of putting out about 50% of the capacity of the larger one. The second way to have 2-stage cooling is to have a single scroll unloading compressor. This compressor can unload its capacity down to about 66% of maximum capacity. Both these methods of getting 2-stage cooling allow the unit to run at a lower stage when the high stage is not needed. By doing this, energy is saved.
2-stage heating has the same principle as 2-stage cooling. It allows the unit to adjust itself based on the amount of heating that is necessary. 2-stage heating is a good way to save on heating costs.
A heat pump system would have two different sized compressors, a small and a large one. The compressor that is used at a given time would depend upon the need. If only a small amount of heating is necessary, the smaller compressor would be used to save energy. The large compressor would only be used when a large amount of heating was needed.
A gas furnace that is 2-stage has a modulating gas valve that regulates gas flow depending upon the need.
Normal cooling settings are 75 degrees - 80 degrees. Normal heating settings are 68 degrees – 72 degrees. You should always set your thermostat to the highest possible setting that is comfortable for you in the summer, and the lowest comfortable setting in the winter. Setting your thermostat in this way will maximize your energy savings. On average, every 1 degree of temperature change is equal to about 1% energy savings. For example, changing your thermostat setting from 75 degrees to 76 degrees in the summer could result in savings on your cooling costs.
This can occur for many reasons: uneven solar heat load through windows, an undersized system, an improperly balanced or clogged system, or a single system serving a two-story home with no zoning control. Each situation is different, usually requiring an onsite analysis with problem-specific recommendations. Please call to arrange for us to see your home.
Yes. As of January 2010 the refrigerant R-22 (what consumers call Freon®) is no longer allowed to be used in the manufacturing of new equipment. R-22 has been used as the "standard" refrigerant for many years but has been found to be harmful to our planet by our government. All new air conditioners and heat pumps use R-410A, the more "environmentally sound" refrigerant.
R-22 is still the most commonly used refrigerant in existing air conditioning equipment in residential homes today. However, per the Montreal Protocol, caps have been established to eliminate the production of R-22. In 2004, there was a 35% reduction; in 2010, there was a 65% reduction; in 2015 a 90% reduction; and finally in 2020 a 99.5% reduction in the production of R-22. This means that during the time of these reductions with high demand, the price of each pound of R-22 refrigerant could potentially skyrocket.
If you are considering replacing your existing air conditioning equipment, most higher efficiency products have already made the switch to R-410A, the more "environmentally sound" refrigerant.
A difference of 6 decibels (such as between 72 dB and 78 dB) is technically a four-fold increase in compressor sound when rating air conditioners or heat pump units. However, it takes a difference of 10 decibels to double the loudness. It is also noted that it takes approximately 3 decibels for the average human ear to discern any difference in loudness at all.
Great strides have been made in reducing the operating sound level of equipment. We will be happy to show you the difference in sound ratings with our product line.
Yes. Each year, carbon monoxide kills more than 200 Americans and sends nearly 5,000 more to emergency rooms for treatment, reports the U.S. Consumer Product Safety Commission (CPSC). Where does it come from? When carbon-based fuels such as gas, oil, kerosene or wood burn, they produce gases. When fuel combustion or burning isn't complete, carbon monoxide enters the air. The CPSC advises that carbon monoxide detectors are the only way to alert yourself to the presence of toxic gas in your home. If you wake in the night with a headache — and especially if another member of the family complains of a headache or is difficult to arouse — get out of the house fast and seek medical help. We recommend carbon monoxide detectors be installed in your home!
Propane (LP) Gas: You have this type if your gas comes from a tank located outside close to your house. Propane is stored as a liquid under pressure in tanks and cylinders. In most residential applications, propane is used as a vapor. When liquid propane changes into a gas vapor, it expands in volume. This means that even a small leak of liquid propane can result in a much larger quantity of propane vapor, which can be especially dangerous in a confined space. A chemical odorant has been added to propane to give it a distinct smell. Learn to identify this odor. Propane gas is heavier than air, so it will sink to the floor and spread. To check for the presence of propane, carefully smell all over a room, especially in low spots.
If you smell propane (LP) gas:
- Exit your home immediately.
- Propane gas can ignite easily. Do not light a match, start an engine, use a cell phone, or do anything that may create a spark.
- From a safe area, contact your propane supplier and call 911.
- If you are able, shut the propane gas supply off at the tank.
- Stay away from your home until you've been told that it is safe to return.
Natural Gas: You have this type if you have a gas meter and pay a natural gas supplier or utility. A chemical odorant has been added to natural gas to give it a distinct smell. Learn to identify this odor.
If you smell natural gas:
- Exit your home immediately.
- Do not light a match, start an engine, use a cell phone, or do anything that may create a spark.
- From a safe area, contact your gas company or call 911.
- If you are able, turn the gas off at the meter.
- Stay away from your home until you've been told that it is safe to return.
Plumbing FAQs
More often than not the flapper in the bottom of the tank is the cause of the problem, which you can simply replace. Also, the chain can be too long and get caught under the flapper. The chain should be long enough to reach from the lever arm to the top of the flapper without pulling on it.
A plumbing system vent does just that: it “vents” the plumbing system in your home. A vent will look like pipes sticking out of your roof and are about 12” high. This vent allows sewer gases to be vented outside the home. Another function of the vent is that when a liquid goes down a pipe air must follow it. Without vents, draining one fixture may cause another fixture in the house to back up. A waste and vent system should keep sewer gas out of the home and drain every fixture well.
Most leaks in residential plumbing systems are found in the toilet tank. These leaks typically result from worn parts or improper alignment of some part of the flushing mechanism. It is important to find and stop these leaks because they will cause an increase in your monthly water bill.
Toilet leaks occur in two ways and very often are difficult to detect. First, the most common toilet leak, and often hardest to detect, is caused by a deteriorated or defective flush valve (flapper) or "tank" ball at the bottom of the toilet tank. If the flapper or ball valve does not seat properly and forms a water-tight seal, water will leak around it into the toilet bowl. Often, this leak will occur without being heard. Here is an easy way to check for flush valve leaks and in just minutes, you can find out if a toilet is wasting thousands of gallons due to an undiscovered water leak. Remove the tank lid, then flush. After the flapper/tank ball drops and the tank refills, add several drops of dark food coloring) or a Fluidmaster leak detector tablet. Wait at least 20 minutes. If any trace of color appears in the toilet bowl, there is a leak.
Toilet leaks occur in two ways and very often are difficult to detect. First, the most common toilet leak, and often hardest to detect, is caused by a deteriorated or defective flush valve (flapper) or "tank" ball at the bottom of the toilet tank. If the flapper or ball valve does not seat properly and forms a water-tight seal, water will leak around it into the toilet bowl. Often, this leak will occur without being heard. Here is an easy way to check for flush valve leaks. In just minutes, you can find out if a toilet is wasting thousands of gallons due to an undiscovered water leak. Remove the tank lid, then flush. After the flapper/tank ball drops and the tank refills, add several drops of dark food coloring) or a Fluidmaster leak detector tablet. Wait at least 20 minutes. If any trace of color appears in the toilet bowl, there is a leak.
The second most common type of leak is caused by an improperly adjusted or broken fill valve. If the float is set too high or the shut-off valve fails to close completely, water will continue to enter the tank and flow into the overflow tube. This type of leak can be seen simply by taking the tank top off and observing if water is flowing into the overflow tube once the tank is full. Excess water pressure can also have a negative effect on the operating system in your toilet.
If you are experiencing either of these types of leaks and need service to fix them, contact our office.
In the event of an emergency, turn off your water.
If the leak is inside your home or you have a burst pipe you should first turn off your water supply at your main shutoff valve. If you do not have a main shutoff valve, or don't know where it is located, you may turn off your water at your meter in an emergency situation. It is advisable to contact a plumber during such emergencies. If any damage has occurred it is also advisable to contact your insurance company. Do not touch any wet electrical fittings — call an electrician.
The rattle you hear is usually caused by the water lines not being properly secured. This can be fixed easily but only if your water lines are easily accessible. It means that there are one or more places where your water lines come in contact with the wood of your floor joists. You will need to get plastic pipe hangers that go between your water lines and your joists. A defective pressure-reducing valve can also cause some very strange noises.
The combination of hydrogen, sulfur, and bacteria in the plumbing causes foul-smelling water. The magnesium anode rod installed in the tank protects the tank surface but generates enough hydrogen to create an odor when it interacts with sulfur in the water or bacteria in the tank. Replacing the magnesium anode rod with an aluminum anode may minimize the problem. The most efficient method of eliminating the hydrogen sulfide odor is to control the bacteria. As a rule, chlorination of public water supplies kills the bacteria, but some private well systems may need to be purified by the use of chlorine injectors or ultraviolet light. This will destroy the bacteria. If you are concerned by the smell, please call our office for professional help.
This condensation on the outside of the tank is caused by cold water filling the tank and humid air in the bathroom. There are a few things you can do. You can insulate the inside of your tank. They sell kits for this and they work fairly well. The tank covers you can put on the outside help somewhat as well. You can also get a mixing valve. This is put on your cold water supply. It will add just enough hot water to the cold to warm it up. When the tank is filled with water at room temperature it won't sweat.
First, make sure the water supply is turned on. If it is, remove the lid to the toilet tank and check to see if the chain or strap to the flapper is broken or comes loose. You could also have a blockage in the toilet "jets" just under the rim of the toilet.
Most often the cause is the fill valve in the tank has a leak in it. If the fill valve is old, you should replace it. Sometimes the shaft or wire that is used to set the level corrodes off. If the shaft or wire seems to be your problem then replacing it should fix your problem. Another possibility, if the fill valve has been replaced recently, is that it could be set too high.
There are several reasons we do not recommend this course of action; most drain chemicals are very toxic in nature and not a good thing to keep around the home if you have children or pets. If they do make it down the drain, the chemicals are contributing to global pollution. In addition, over time these chemicals may deteriorate your pipes from the inside out. When this happens, the drain line(s) will have to be replaced, which creates a huge expense.
Do not confuse toxic drain cleaners with the various drain maintenance products that are on the market. These products contain ‘friendly” bacteria and enzymes. They work great to keep any drain sludge and grease from building up in the pipes.
Water Heater FAQs
The water heater Energy Factor (EF) is a measure of the overall efficiency of the water heater. This is determined by comparing the energy in the heated water used daily to the total daily energy consumption of the water heater. The EF can be used to compare the energy efficiency of water heaters. Water heaters with higher EFs will have lower annual operating costs than comparable models with lower EFs. A higher EF signifies a more efficient model. Water heaters with high EF ratings may cost more initially, but save energy and money in the long run. Eventually, they will pay for themselves through a lifetime of energy savings.
For most water heaters, the anode rod is attached to the hot water outlet of the water heater. If you are facing the front of the water heater (where the labels are), the hot water outlet is on the left hand side. The anode rod is often referred to as a "sacrificial rod".
Most water is rarely "pure". It can contain oxygen, magnesium, fluoride, chlorine, and suspended particles. These components, in the concentrations in your water, are usually not bad for you. However, they do contribute to the taste and smell of the water. They also impart a slight conductivity to the water. Through an electrical process called electrolysis, this conductivity will eventually (over a long period of time) cause most metals to rust or corrode. When the water is heated, this electrical process can be accelerated.
Most water heaters are made of a steel tank with a porcelain enamel (glass) lining. However, due to production and assembly methods, it is not always possible to completely cover the inside of the tank. Therefore it is important to provide metal that can be consumed by the electrical process. This is where the sacrificial anode rod comes in. By acting as a lightning rod for the corrosion process, the anode rod draws the harmful electrolytic process away from the water heater tank and focuses the corrosion on the anode rod. Water heaters need this sacrificial anode rod to ensure that the electrolysis does not affect the tanks.
The answer may be that you have sediment buildup in your tank. As water heaters age, they tend to accumulate sediment and lime deposits. If the heaters are not cleaned periodically, the sediment may rise to a level that will act as a barrier between the burner and the water, making it harder to heat. An article published in a national ASPE plumbing journal states: For every half inch of sediment on the bottom of a gas fired water heater, it requires up to 70% more fuel to heat the water.
Yes. The Air Conditioning, Heating, and Refrigeration Institute (AHRI) recommends that any flood-damaged heating and cooling equipment be replaced, not repaired. From the AHRI website, as it pertains to water heaters:
"Whether your water heater is gas-fired, oil-fired, or electric if it was exposed to flood water, the unit should be replaced. In a gas unit, valves and controls will likely corrode. In an electric unit, the thermostat and controls will likely corrode. In both types, the insulation surrounding the unit will be contaminated and will be nearly impossible to disinfect. Additionally, the insulation would take a long time to dry, leading to corrosion of the tank from the outside.
Even if water heater components have been cleaned and the unit seems to operate properly, parts may corrode in the future. Both gas and electric water heaters have pressure relief valves that can corrode and stick after being exposed to flood water. Therefore, be sure to replace this valve as well."
(Taken from www.ahrinet.org)
At the suggestion of AHRI, be sure to have your inspection and replacement work performed by a qualified professional.
With the increasing costs of energy and a desire for environmental friendliness, some customers are turning to the sun as a way to heat their domestic water. Bradford White manufactures a solar water heating storage tank for solar systems. This tank takes the heated water from the solar panels and uses it as a heat source instead of conventional gas, oil, or electric heat sources. Unlike other tanks, this water heater has an electric heating element for backup on cloudy days and when the solar system is not providing enough heat. However, it is important that you use only potable (or domestic use) water in this tank.
A water heater should be placed in an area that will prevent damage to floors, ceilings, and furniture if the heater leaks. When this is not possible, a drain pan must be installed under the water heater. Since a typical drain pan doesn't hold that much water, it must have a pipe to a drain or other outlet for the water. When installed properly, a drain pan and pipe will keep any leakage under control and protect your belongings from water damage.
We recommend that you contact a plumbing professional to perform any maintenance or repairs to your water heater — from periodic checks on the anode rod to ensuring that all connections are secure. Recommendations for maintenance are in your water heater's owner manual. However, there are a few things that you can do:
- Ensure that there are no sources of flammable vapors in the same area as your water heater (this includes gasoline, heating oils, lighter fluid, propane, etc.).
- Keep the top of the water heater clean. If you notice water dripping on the water heater from any piping, contact a plumbing professional to have the leak repaired.
- Keep the space around your water heater clean and free of dirt, boxes, paint cans, aerosol cans, household cleaners, and trash. It is important to keep the heater accessible for proper operation and easy maintenance.