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Milwaukee Heating System Repair & Replacement


The Wisconsin winter is brutal. Your home heating system is absolutely vital to making it through the cold. If your heating system isn’t working properly, call our HVAC experts to schedule an inspection. We offer 24/7 emergency service and will arrive promptly to fix the problem. Our team will even pick up a coffee or anything else you need while your system is being worked on.

Repair my Heating System


If your heating system is on its third or fourth repair, you may need to replace the system to save money in the long run. Older heating systems tend to only be 50-70% efficient while newer systems reach 90-95% efficiency. The Hartlaub team will recommend which replacement option would be best for you. Our HVAC professionals can install furnaces, boilers, radiant systems, ductless systems, heat recovery ventilators and heat pumps in your residential or commercial property.

Replace my Heating System



  • Loud noises & sounds – when your HVAC system is working properly it should run with minimal noiseHeating System Repair Milwaukee Wisconsin
  • Constant cycling – When the heating system turns on again right after completing a cycle, it indicates your system is highly inefficient. Modern heating systems automatically turn off when your home reaches the correct temperature and stay off until there is a temperature change.
  • Excessive Condensation on Windows – Your heater should not be adding excessive moisture to the air. If you see regular condensation on your windows and glass doors, your heating system needs a repair.
  • Frequent temperature adjustments – if you’re constantly changing the temperature on your heating system to reach a comfortable temperature, it may need repair.
  • Frequent Repairs – multiple repairs are a strong indicator of a failing system that needs to be replaced. The cost of replacing the entire unit may be less than a heating system’s end-of-life journey through frequent repairs.
  • Poor indoor air quality – if you notice more dust present in your home, your heating system may need to be cleaned. Dust and grime can also corrode the system components, which may call for a repair too.
  • Inconsistent room-to-room temperature – if the temperature throughout your house isn’t consistent, your heating system may be too small for the size of your home.
Contact our HVAC professionals if your HVAC system is needing repair or replacement.



FURNACE Types of HVAC heating systems

Most American households use a central furnace for heating. Furnaces blow air through ducts into rooms throughout the home. Newer furnaces that run off high-efficiency natural gas, fuel oil, or electricity can reach 96% efficiency compared to 60-70% efficiency of older furnaces. Electric furnaces are the most efficient systems with an AFUE (Annual Fuel Utilization Efficiency) of 95-100%. Other less efficient energy sources include natural gas, propane, and oil. Unfortunately, electric heating is more expensive than other options.

On average, furnaces are the most affordable heating system since they are most common in American households. Furnaces are also better for cold climates since they do not rely on water for heating - water that can freeze during winter. The installation process is also easier. The cons of a furnace central air system include noisiness, poor air quality, less consistent air temperature, and less efficiency compared to other heating systems. Poor air quality may be of concern to people with allergies or asthma since furnaces use recycled air containing allergens and dust to heat the room.


Boilers work similarly to furnaces except they use the hot water and steam for heating. The steam is distributed through pipes to steam radiators while the hot water travels through baseboard radiators or radiant floor systems and can heat air via a coil. Hot water boilers tend to be more efficient than steam boilers.

Boilers are powered using electricity, oil, natural gas or wood. Boilers are known to be much more energy-efficient than forced-air HVAC systems like furnaces. They also heat a room more consistently than a furnace and require less maintenance. Boilers also are better for people with allergies and asthma since they don't spread dust or allergens through the air. The downside is the initial installation cost for a boiler heating system is greater than a furnace. They also are take longer to heat/cool a room compared to furnaces and other heating systems.


Radiant heating systems use networks of pipes or electric cables, bypassing the use of ducts and boilers. The system is installed in the wall, under the floor or in the ceiling of a house. Temperatures can vary from room to room, saving energy and offering comfort on demand.

Because they heat the home directly without using air, you can expect even temperatures throughout the house. Radiant systems are great for homeowners with allergies or people seeking a more cost-effective, low maintenance heating system. The only downside is that radiant floor or ceiling installation may shorten a room’s vertical space.


Ductless heating systems come in several forms. The two most popular systems are mini-splits and variable refrigerant flow (VRF). Ductless mini-splits have two main components: an outdoor compressor and an indoor wall-mounted unit. They can be configured to heat multiple rooms using only one compressor. VRF uses refrigerant to absorb outside heat and release it through an indoor unit. Both options are flexible, energy efficient, and are great for multiple rooms with different temperature needs

Many advantages of ductless systems come from not having ducts. Because ductless systems don’t require components inside of the wall or ceiling, they’re easy to retrofit. Indoor air quality is improved because there are no air ducts to collect dust, pollen and other allergens. Although regular maintenance is needed to clean debris from the filter, ductless systems can save you at least 25% of energy usually lost through ducts.


HRV's consist of two ventilation ducts running next to each other passing between the inside and outside of a house. One duct carries the stale, moist air out while other duct carries the fresh air in. The airstreams run through a heat exchanger that enables the outgoing air to pass its heat to the incoming air without them actually mixing together. This enables your home to continuously have fresh air in the house while keeping the house sealed and heated on a cold day.

Having continuously fresh air in your house on the coldest or warmest days of the year allows for optimal comfort. With less dust and moisture in the air, there is a lower risk for allergic reactions or asthmatic complications. Clean, dry air also denies the chance for mold or mildew to sprout, keeping your home clean from fungus and comfortable year round.


Heat pumps are an all-in-one heating and cooling system. Heat pumps act like an air conditioner in the summer months, and then heat your home in the cooler months. Since a heat pump will only heat your home until the temperature outside drops to below 40 degrees, Wisconsin home owners will usually pair a heat pump with a furnace for once the winter truly kicks in.

This hybrid heating approach can lead to the immense savings throughout the course of the year. In the cooler fall and spring month’s heat pumps uses a sliver of the energy a furnace requires to keep your home from turning into an icebox. The heat pump is the most environmentally friendly option of heating your home. While not viable for the coldest days of a Wisconsin winter, you will save money and energy for those brisk fall and spring days leading up to the frozen tundra conditions we know so well.


  • Set the central heating system as low as is comfortable during winter and lower the temperature during nighttime
  • Clean or replace furnace filters about once per month
  • Clean warm-air registers, baseboard heaters, and radiators as needed
  • Make sure floor vents aren’t blocked by furniture, carpeting or drapes
  • Turn off kitchen, bath and other exhaust fans within 20 minutes after you are done cooking or bathing
  • Use high-efficiency, low-noise exhaust fans
  • Allow sunlight through your windows on cold winter days, and close the drapes at night to reduce the chill you may feel


Hartlaub’s professional HVAC technicians will make sure your new heater is installed, repaired and maintained properly so you can get the best performance it has to offer. You won’t find another company that cares more about the customer experience than Hartlaub. Our friendly technicians go above and beyond to make sure each project is completed without a hitch. We introduce ourselves ahead of time by sending a custom technician profile via text. We also send departure and arrival notifications, so you aren’t left waiting to answer the door. Our technicians have no problem swinging by the store to pick up some coffee, water or whatever else you need while we work on your HVAC system. Hartlaub is an experience, not just a business.

Contact the Wisconsin heating technicians at Hartlaub today to get an estimate on our heating services.
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