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Harker Heating & Cooling
About Us -We're a furnace and air conditioner contractor who has been in this area for more than 60+ years.
About Us -We're a furnace and air conditioner contractor who has been in this area for more than 60+ years.

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#heating #cooling #heatpumpsinmadison
What is a Ductless Split Heat Pump?
by: Harker Heating

A heat pump is a standalone appliance utilizing two technologies, refrigeration and electricity, to heat and cool a home, room, or other spaces. A heat pump is comprised two components, a condenser unit (air handler), that often sits on the outside of a home, and an indoor unit, that sits on a wall or within a ceiling.

What does ductless mean? It simply means that the heating or cooling is delivered by lines/piping, rather than ducts.

What does split mean? It means that the air handler and the condenser are “split” by refrigerant line.

How does a heat pump work?

A heat pump uses electricity and refrigerant to move heat from one place to another. To produce heat, a heat pump extracts heat from the air outside of your house and transfers it to refrigerated coolant. The coolant is them compressed, which increases the temperature. The coolant is then moved to the air handler, which, in turn, passes air over the hot coolant, increasing the temperature to accommodate what the thermostat called for.

Why a heat pump?

Most importantly, a heat pump should be used in Wisconsin as a comfort measure. If you have boiler heat and are looking for air conditioning, a ductless split heat pump may be a great option for you. It would certainly be less invasive than the construction and installation of duct work. Another application is to heat or cool an area that just doesn’t seem to be as comfortable as it could be. Maybe a room or kitchen faces the sun most of the day, leading to additional solar heating of that area. A ductless split can target that specific area with cooling, if you should choose. A heat pump uses electricity for power, rather than the generation of heat (think gas furnace). This method is more efficient, overall, that a gas furnace, when it comes to heating an area.

Can a heat pump operate in very cold temperatures?

Technology has advanced greatly in this area. A number of years ago a heat pump, such as an older Mitsubishi Ductless Split, would work at or just below freezing. Nowadays, the temperature can drop considerably more. A Mitsubishi Hyper Heat model is designed to provide comfortable indoor temperatures in extreme cold climate conditions, as low as -13F. In Wisconsin, a heat pump cannot be a primary source of heating within a home. You do need a back-up, such as baseboard heating.

If you have any questions about heat pump ductless splits, were here to help. Call us at 608 255 6902 or email us at

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#Homeishot #Fixmyac
7 Tricks to Surviving a Hot Summer Home
1) Keep your curtains or blinds closed all day. It’s a good idea to get them closed as early on in the day as you can. It will help stop the sun from shinning through the windows, which heats up the inside. Pulling your curtains across or your blinds down essentially stops your home from becoming a greenhouse.
2) Grill out, instead. Keep your oven off as this can transmit heat into your kitchen, for example.
3) If you want the air conditioning to permeate throughout the house, keep all of the doors open. Conversely, if you want to keep a certain area cooler than others, providing it has access to air conditioning, close the doors.
4) Cold Air Fan Hack – The trick here is to fill a bowl with ice. You then position the ice at an angle in front of a fan. The air will whip off the ice and give a soft, cool, breeze.
5) Run your ceiling fans. Set your fans to run counter clockwise in the summer.
7) The Not So Hot Water Bottle – If you have a hot water bottle, which you utilize in the winter, you can use it the opposite way in the summer. Simply fill with water and place in the freezer.
8) Throw out incandescent lights – This type of lighting waste 90 percent of the energy they use as heat. Throwing them and replacing them with fluorescent lights, for example, may make a difference to the cooling of your home.

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There's still time to vote in the Star of Madison poll! #Madison

#fixmyac #hvac #cooling #madison
Is your Air Conditioner down or not running well? Things to check before you call for a Harker Technician

Is your air conditioner not starting? Is it not cooling very well? Try a few of the items below before you call for a technician. It may save you a few dollars.
If your Air Conditioner won’t start or run at all, check these things first:
1. Be sure to check the electrical panel fuse to make sure there is power to the unit.

2. Check the outside shut off switch. This switch is usually located next to the air conditioner, itself. Make sure it is in the on position, or that the fuse, in some cases, has been placed back in correctly .

3. Make sure the thermostat is in cooling mode. If it is in cooling mode, set it 5 degrees below the current room temperature and wait for a response.

4. Replace the batteries in your thermostat, if any, just to be sure.

If your Air Conditioner is starting up and running but no cool air is coming out, do this:
1. Turn off the power to the furnace. This can be done at the electrical panel or there may be a switch at the furnace.

2. Clean or change the air filter. Click on this link to see how you can change your filter.

3. Only try the following step if you are confident in what you are doing. Look to see if ice has formed on the coil above the furnace. With the power off, remove the panel to view the coil above the furnace. If you see that the coil is covered in ice, close the panel back up, turn the power ON and the fan ON at your thermostat, to help melt the ice. Wait for the ice to thaw (1-2 hours), run the air conditioner again, and check to see if cold air is coming out of your vents.

If there is ice either on or around the coil, or outside at the site of the air conditioning unit, there are usually two reasons for this:
1. Reduced air flow. Most of the time this is caused by dirty filters, dirty coils, or poorly working fans.

2. Low refrigerant. This has to be checked by a professional. Low refrigerant could be caused by a leak in your system. Simply adding more refrigerant into your system is usually only a temporary fix. The leak has to be found, fixed, and tested. If the leak is not fixed, and only refrigerant added, the leak will continue to occur.

Call us at Harker Heating & Cooling if you experience any troubles with your air conditioner at 608 255 6902. We’d love to help in any way that we can.

Why won’t my Air Conditioner keep up on those hot, hot days? The truth.
We tend to believe that if we set our thermostat to whatever temperature we desire, the air conditioner will perform as needed. This simply is not the case, however. There is a limit to what your air conditioner can accomplish given the temperature outside. In general terms, air conditioners are designed to accommodate a 15-20 degree difference between the outdoor temperature and the ambient temperature inside. Let’s say it’s 90 degrees outside. You could expect your properly sized system to get your indoor temperature down between 70 and 75 degrees. Don’t forget that humidity can play a role in your comfort, irrespective of the indoor temperature. Purchasing and running a whole home dehumidifier can make that 70 degree plateau feel much cooler than a humid 70 degree environment.

One those really hot days when we can hit the 100 degree mark, cooling a room, let alone your home, below 80 degrees is an unrealistic expectation. Your air conditioner will run all day long trying to reach that low temperature. Having it run that long will be a waste of your money, time, and frustration. What CAN you do to help the situation? Prepare by keeping the blinds/curtains closed all day. Running a ceiling or portable fan in rooms where people or pets are situated can help. Remember that a fan does not cool the air. It only moves it across our skin, which makes us feel cool. If a fan is on in a room with no one present you are simply using up electricity. And, as always, plenty of ice water for you and yours goes a long way in keeping you hydrated and comfortable.

4. Look for ice on the air conditioner and refrigerant lines outside. If you find ice, it may be time to call for a technician.

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