Thanks for letting us know that the Hyper Heat ODU really does still make great heat in the SUB zero temps. I have a 30k BTU Mitsubishi setup here with 3 air handlers. They are Hyper Heat units, but the ODU is only standard and rated down to 5 above. Because I wanted to keep my old gas furnace, my installers did not push for the Hyper out door unit. That was a mistake because I wanted to make the split system my primary heat source which I how I treat it. Anyway...... This system will make warm air at that max rating, but now in my second winter with it, I do as you did. At 9 degrees (in my case), I will kick the gas furnace on for one cycle (20 minutes) set at 69. This gives the home a kick start if the Mitsu has fallen behind overnight. Usually as soon as the morning sun comes up and temps get around 11 degrees, I run the Mitsu again and it will maintain that temp. Yes, it does indeed run a bit harder, but electric here is cheaper then gas. (with my 1979 - original to the home furnace with 150k BTU burner!). Because of my system, I have helped suggest the Mitsu system to TWO friends, but they went with FULL Hyper Heat units and they have no issues with them in the coldest of over night temps we have had so far. Thanks for your video of the defrost cycle. You will also notice then when in defrost, the indoor units will move the out put fins back to full horizontal position and when done, will return to your set positions. ( BTW, I am here in Western MA.)
Thanks for your comments Gary and sharing about your system and your experience with it. It's really fascinating to hear how others are integrating heat pumps into their homes because they are so versatile. Some use them for specific zoning and others rely on them 100% as their primary source of heating and cooling. You should be in pretty good shape using your 30k unit to cover most of the winter. Here in southern Ohio we do see temps in the negatives but not for very long...maybe a few days to a week or so here and there. Like you said when the sun comes up and the temps rise just a tad it makes it much easier for the systems take on the full load. In our home (built in 1850) we have several forms of heating. Mostly we use our OWB to heat water that runs underground into our house and supplies heated water for our old cast iron radiators installed in rooms around the house as well as our domestic hot water. The kids and my wife love the endless hot water for the showers lol. We also have a pellet fireplace insert we can run in our living room which is also where the Mitsu floor unit is installed. We mostly run the Mitsu to maintain the heat in the living room because of how efficient and cheap it is. Our last resort is an oil boiler which we haven't run for years now except to test it every now and then. Take care!
We have standard vinyl windows and with them closed I can’t hear it in the house. I admit defrost it is a little louder than I anticipated because when its running in heat mode you can barely hear it at all. We love the unit!
Mine makes a crazy loud whooshing noise from the inside units whenever it goes into defrost mode. You ever have problems with noise inside the house? Mine’s awful. Won’t run it below 37 degrees because of the noise. Technician just said that’s normal. Skeptical.
Yea mine will do that too. Wooshing is a great way to describe it for sure. Its completely normal and nothing to worry about. Its programmed to defrost as quickly as possible to get back to heating mode so it runs at full speed to do this.
Usually as the temperature drops, the efficiency (how fast it heats up your home), it will just take longer to do and than after about -35F, the efficiency will be so low that you should than turn on your Natural Gas (or propane, wood, or pellet) heater to continue the job until the temperature rises outside again. Usually those temp drops happen a few hours to a few days UNLESS you are in the artic regions.
We just had temps that sat around -9 for a few days with wind chills around -30. It put out great heat and did not have any issues heating our room. I did a video of it running at -7 and showing it was still putting out 120 degree heat! Crazy...here is the video. ruclips.net/video/1LPrSdN5P7M/видео.html
@@newpylong I'm an installer. And in UK at least, your comment about cost is a complete lie. Latest info from from UKIFD: average annual heating costs for three bed house: kerosene £1323; gas £1583; ASHP £2935 (sept 2023) So absolutely zero payback time after a very costly installation.
Thanks for letting us know that the Hyper Heat ODU really does still make great heat in the SUB zero temps. I have a 30k BTU Mitsubishi setup here with 3 air handlers. They are Hyper Heat units, but the ODU is only standard and rated down to 5 above. Because I wanted to keep my old gas furnace, my installers did not push for the Hyper out door unit. That was a mistake because I wanted to make the split system my primary heat source which I how I treat it.
Anyway......
This system will make warm air at that max rating, but now in my second winter with it, I do as you did. At 9 degrees (in my case), I will kick the gas furnace on for one cycle (20 minutes) set at 69. This gives the home a kick start if the Mitsu has fallen behind overnight. Usually as soon as the morning sun comes up and temps get around 11 degrees, I run the Mitsu again and it will maintain that temp. Yes, it does indeed run a bit harder, but electric here is cheaper then gas. (with my 1979 - original to the home furnace with 150k BTU burner!).
Because of my system, I have helped suggest the Mitsu system to TWO friends, but they went with FULL Hyper Heat units and they have no issues with them in the coldest of over night temps we have had so far.
Thanks for your video of the defrost cycle. You will also notice then when in defrost, the indoor units will move the out put fins back to full horizontal position and when done, will return to your set positions. ( BTW, I am here in Western MA.)
Thanks for your comments Gary and sharing about your system and your experience with it. It's really fascinating to hear how others are integrating heat pumps into their homes because they are so versatile. Some use them for specific zoning and others rely on them 100% as their primary source of heating and cooling. You should be in pretty good shape using your 30k unit to cover most of the winter. Here in southern Ohio we do see temps in the negatives but not for very long...maybe a few days to a week or so here and there. Like you said when the sun comes up and the temps rise just a tad it makes it much easier for the systems take on the full load.
In our home (built in 1850) we have several forms of heating. Mostly we use our OWB to heat water that runs underground into our house and supplies heated water for our old cast iron radiators installed in rooms around the house as well as our domestic hot water. The kids and my wife love the endless hot water for the showers lol. We also have a pellet fireplace insert we can run in our living room which is also where the Mitsu floor unit is installed. We mostly run the Mitsu to maintain the heat in the living room because of how efficient and cheap it is. Our last resort is an oil boiler which we haven't run for years now except to test it every now and then.
Take care!
Can you hear it from inside the house? Would if bother you if you were trying to sleep in a bedroom above it? Thanks
We have standard vinyl windows and with them closed I can’t hear it in the house. I admit defrost it is a little louder than I anticipated because when its running in heat mode you can barely hear it at all. We love the unit!
Is it something that ecodan unit do it automaticly. Or manual.
Ia have ecodan but its cild freese. I havent seeing it defrostun yet.
All heat pumps should be doing the defrost automatically. You probably have an issue with the outdoor unit PCB.
Mine makes a crazy loud whooshing noise from the inside units whenever it goes into defrost mode. You ever have problems with noise inside the house? Mine’s awful. Won’t run it below 37 degrees because of the noise. Technician just said that’s normal. Skeptical.
Yea mine will do that too. Wooshing is a great way to describe it for sure. Its completely normal and nothing to worry about. Its programmed to defrost as quickly as possible to get back to heating mode so it runs at full speed to do this.
It's normal.
So do you find that when it's really cold out that it still heats your room ok?
Usually as the temperature drops, the efficiency (how fast it heats up your home), it will just take longer to do and than after about -35F, the efficiency will be so low that you should than turn on your Natural Gas (or propane, wood, or pellet) heater to continue the job until the temperature rises outside again. Usually those temp drops happen a few hours to a few days UNLESS you are in the artic regions.
@@mmenil1 ahh, thanks, I am in fingerlakes of NY, once and awhile it's can get to -10 but doesn't last usually for more than a week or so.
We just had temps that sat around -9 for a few days with wind chills around -30. It put out great heat and did not have any issues heating our room. I did a video of it running at -7 and showing it was still putting out 120 degree heat! Crazy...here is the video. ruclips.net/video/1LPrSdN5P7M/видео.html
Electric companies just rubbing their hands with glee.
Do you even have one? Electric bill is a fraction of what the fuel bill was.
@@newpylong I'm an installer. And in UK at least, your comment about cost is a complete lie. Latest info from from UKIFD: average annual heating costs for three bed house: kerosene £1323; gas £1583; ASHP £2935 (sept 2023)
So absolutely zero payback time after a very costly installation.
@@typhoon2827what is a ASHP