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24/7 Emergency Heating & Cooling Repair Service Call 414.281.5350 in Milwaukee
Carrier air quality sytems for a cleaner house, and fewer allergens Air Quality Don’t breathe stale air ever again with a Carrier Humidifier from D&M Humidifiers D&M is Milwaukee’s factory authorized Carrier Boiler dealer Boilers Shop HVAC controls from D&M Controls D&M keeps Milwaukee cool with Carrier Air Conditioners Air Conditioner Stay warm even in the harshest Wisconsin winters with a Carrier Furnace from D&M Furnaces Air QualityThe indoor air quality of your Milwaukee or Waukesha home directly affectsboth your comfort and health,especially for children who are atrisk for developing allergies or asthma.

Milwaukee Heating & Air Conditioning FAQs

D&M Heating & Air Conditioning believes in educating our customers about the industry and our reliable services. Our goal is to help you choose the right installation or service based on your budget and needs.

If you receive service from us, we will provide expert maintenance tips to help you ensure lasting quality. It’s important to detect premature issues with your boiler, furnace, or air conditioning system before the damage costs increase. 

Below are the most commonly asked questions addressing home heating and cooling queries, including HVAC products, services and other general equipment or system queries. If you don’t find the answer to your question, call D&M Heating & Air Conditioning in Milwaukee with any questions you may have.

To conveniently schedule an appointment for one of our NATE certified HVAC service technicians to come to your home simply call 414-281-5350. At D&M, the entire team is always “At your service.”

Frequently Asked Questions

What is "high efficiency" heating?

A new standard gas furnace is 80% efficient. A high efficient furnace is above 90% efficient with some as high as 96% or more. Most of the very high efficiency furnaces have multiple stages of heating and very efficient electric blower motors to further lower your total utility costs.

What is SEER?

SEER measures efficiency. The acronym stands for Seasonal Energy Efficiency Ratio. SEER rating is based on the cooling output of an air conditioner during a given cooling season. The output is divided by the energy input it consumed during that same time period. SEER reveals the cost effectiveness of your air conditioner. In 1994, the minimum efficiency for air conditioners was mandated at 10 SEER. That was raised in 2010 to 13 SEER. Let's assume your 10 SEER unit costs 100.00 per month to run. A 13 SEER unit, running in the same month and conditions, would have done the same cooling work for about 77.00. D & M Heating and Air Conditioning's most efficient unit is a Carrier 21 SEER. For only 48.00 per month the Carrier model would perform the same as the other two. The high efficiency Carrier in this scenario would reduce your monthly air conditioning by over half! 

How does a high efficiency furnace work?

high efficiency furnace takes the exhaust gases that would go up the chimney from a standard furnace and passes them through a second heat exchanger to take advantage of the heat remaining in the exhaust.  The hot gas is cooled and condensation is formed in the second heat exchanger, and the exhaust is power vented directly out of the home in PVC plastic piping.  By reusing the heat, the furnaces typically increase the efficiency by 11-16%.

What else can make my Milwaukee home more comfortable?

A system that controls temperature, humidity and indoor air quality can greatly improve the comfort in your home. Humidifiers to add moisture to dry homes in the winter, air conditioning and dehumidification units to dry the home during summer and better performing air filters all add to your comfort.  For special comfort problems, call and speak with a comfort consultant for answers.

What size should my furnace or AC unit be?

That question is best answered by a sales or service person in your home. Many factors affect the proper sizing of a unit, including: size of the space, orientation of the home, ceiling height, windows, insulation, age of the home, efficiency of the unit, and more. A properly sized unit should run nearly non-stop at design temperatures (i.e. -10 degrees for heating, 90 degrees for A/C). Sizing a system smaller to cut cost of installation or operation will result in systems not being able to keep up during the extremes. Too large of a unit will cost more to run, not dehumidify properly for A/C, and not heat up as well for the heating season. In addition, these larger units cycle on and off much more frequently, causing service problems in the future. In the Milwaukee area, between 600 and 800 feet per ton of air conditioning, and 400-900 square feet per 30,000 BTU output of a furnace is common.

Which way does my filter face?

The airflow arrow on a filter, or electronic air cleaner cell, should point toward the blower of the furnace. If there is no arrow, then the most supported side of the filter usually faces the blower of the furnace or air handler.

How often should my HVAC system be looked at?

You should service your AC unit at least once a year. If you suspect problems it is best to service it right away as damage could compound. D&M offers 24/7 emergency HVAC repair services if disaster strikes without warning. 

What is NATE Certification?

NATE Certification is a guarantee of continued excellence in the field of HVAC installation and repairs. 

Where did my Freon go?

If there is not enough freon in your unit, either the unit was never filled properly, or refrigerant was lost. If it was lost, chances are very high that it leaked out, not stolen. Many cooling systems have leaks, ranging in size. When the system loses refrigerant, the performance suffers. The system can freeze, and cause more problems down the line.

Can I still get Freon?

D&M will refill any missing Freon during HVAC repair services. 

How do you find a leak?

We can perform one of several types of leak searches, depending on the size of the leak, and placement of the equipment and lines. We use high pressure nitrogen, Ultraviolet sensitive dyes, and a "sniffer". Sometimes, multiple trips are requires to complete the repairs, as the first trip usually identifies the fact that there is a leak, dye is added, or nitrogen is added. Subsequent trips generally are for repairs to the system, or finding the dye.

What is that black stuff in my drain hose?

The stuff in the hose is usually dirt, debris and sometimes algae. Replacing the hose, or flushing it with a strong bleach water solution generally helps.

Why are my windows wet?

Wetness on the windows is usually caused by stagnant air. Too much humidity can also cause the problem. If you feel dried out in the winter, it is probably stagnant air. Anything heavy, including closed blinds, can trap warm, moist air against the windows. At night, when the temperature drops, this moist air does not circulate through the house, it condenses on the window and surrounding woodwork. Keeping the windows clear helps solve this problem. Keeping the air circulating with the furnace blower fan helps to reduce moisture on windows by moving the moist air off of them.  We can now retrofit a very high efficiency motor into older furnaces.

If you do not feel dry, or live in a new home, adding a HRV / ERV is often the solution.

Why are my sinuses dry, my woodwork splitting, and my carpeting giving me shocks?

Many homes are too dry in the winter. Adding a whole house humidifier can help alleviate these problems. We have many units with different capacities to fill any need.

What can I do to help allergies?

If you or a family member have severe allergies an Indoor Air Quality System from D&M might be able to help!

What is the Energy Star Label and what does it mean?

The Energy Star label is a program combining the Environmental Protection Agency (EPA) and the Department of Energy (DOE), providing environmentally-friendly products with low cost. The Energy Star label on our heating and cooling systems means we are providing top-quality and energy-efficient products for less.

What is hybrid heat?

This refers to the duel fuel system that heats and cools while costing less than the traditional method. The benefit in Hybrid Heat is that you choose the best economical method, fitting your own personal budget. As your indoor temperature changes, the switching between the two fuel sources takes place, proving far more efficient than other systems.

What if my AC randomly fails on a hot day?

Give us a call right away. Our air conditioner technicians will be on the scene, diagnosing the problem and quickly offering solutions. Getting stuck with a failed AC is never fun; we recommend getting your AC checked before summer kicks in. You’ll be glad you did.

Do you have to be tech-savvy to use your HVAC system controls?

Absolutely not. Once we install your new system, we will educate you in how to work the touchscreen control. Our convenient control pad is super easy to use, and is even equipped with Wi-Fi for wireless access.

What kind of humidifier should I have installed in my home?

It really depends on the amount of space you need humidified. We offer different systems in all shapes and sizes, fitting your specific needs. Our Power humidifies are best suited for larger homes, while Bypass humidifiers are used for smaller areas.

What does the label Carrier Factory Authorized Dealer mean?

Carrier awards certain dealers for achieving national standards in installation and maintenance. Attaining this label displays our top-level of professionalism, efficiency, and expertise. We are truly proud of our work, offering Carrier-branded products to all of our customers in Southeastern Wisconsin.

What does HVAC mean?

It’s an acronym for heating, ventilation, and air conditioning. HVAC offers convenience for homeowners by providing a single source for installation, repairs, and maintenance on any heating or cooling system you use.

Should I have my HVAC regularly checked? If so, when?

Your HVAC system should be routinely inspected around twice a year; before the drastic change of seasons, spring and fall.

Does every one of your HVAC systems come with a touchscreen thermostat control?

No, but we can install a touchscreen thermostat to any of our Carrier heating and cooling systems. We can even provide a WI-FI enabled thermostat for your system. If you are a more traditional-type person, we will work with your preferences to make you feel as comfortable as possible. 

How can I make my home cooler without raising costs?

D&M Air Heating and Air Conditioning wants you to save money on your central air bill this summer, so you have more money for your summer expenses like vacations, patio furniture and yard work equipment. Here are some air conditioning tips that D&M’s own central air technicians use in their homes each summer to save money on air conditioning.

Enhance Air Circulation

D&M Heating & Air Conditioning sells multiple Carrier central air units designed for maximum circulation. However, if a new air conditioner is not in your budget this summer try some home remedies to keep your central air bill low. Using ceiling fans to circulate your air, for example, helps. Since heat rises, ceiling fans recirculate warm air better than box fans on the floor. 

Seal Central Air Ducts

Surprisingly, duct tape isn’t for ducts. Duct tape was invented during World War 2 for sealing ammunition boxes. If you use it on your air conditioning vents, your cool air will leak before it can recirculate in your home. The key to airtight, cost-effective sealing is mastic sealant or mastic tape.  Not all of your air conditioning ducts will be accessible because some may be hidden in ceiling panels, but you’ll enhance the efficiency of your central air system by sealing the ducts you can reach.

Screen Your Windows

Banish solar-heated air from your home with window screens. A variety of styles are available including transparent sheets made of a metallic substance that deflects heat and bears some of your air conditioner’s cooling burden. The US Department of Energy recommends screening all windows before the summer sun starts baking later in the year, especially windows facing east and west. The move can intercept up to 70% of solar energy, freeing your air conditioner to convert primarily thermal-heated air to that crisp, cool temperature you’ve come to love during sweltering Milwaukee summers.   

Vary Air Conditioner Fan Speed

Your air conditioning fan should usually be on high while your central air is running. However, if Milwaukee’s forecasters are predicting a humid day, reduce your fan speed to low. It will reduce moisture build-up in your air conditioning unit and relieve some of the conversion burden of your central air system.