“Dual Fuel Heat Pumps are JUNK” 😬🔥

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This is my fourth upper midwest winter with a Daikin Fit. It handles 75% of my heating load in winter. The coldest stretch of winter is handled by my Daikin gas furnace. It is a great set-up and we enjoy the comfort and even heat that the heat pump provides. We definitely notice a difference between the two heat sources and prefer the heat pump. We used this setup because the home was built in the 90's and needs some insulation and duct re-working to be a candidate for a 100% ASHP; which we definitely plan to do.

Spacepak Solstice is a nice unit and readily available here. Excellent video, So few understand about the different heating and cooling loads across the country and you did an excellent job explaining it.

Great video like all of your others. Relating to duel fuel with a gas furnace. Do all heat pumps go into defrost? Even the inverter type? If so is there supposed to be a wire to run the gas furnace while in defrost? I've seen some other installation videos that don't do it. It's usually on the inverter type. I've seen a terminal labeled "D" on the HP but nothing connected. I know they are normally not supposed to run at the same time but I read that is should in defrost so you aren't blowing cold air. Thanks!

10 years with a Mitsubishi air to water heater in Sweden. It works down to -13F although it has run lower too and still produced heat although a little less heat then. It also creates all our tap water. Natural gas is exotic here, you can buy imported gas in canisters for your BBQ. Burning gas unsupervised does not seem wise. I'd stick with the electric one. ;)

I’m a huge fan of R-290 but there are a variety of cold-climate capable air-to-water heat pumps you can use today: Chiltrix, SpacePak, Enertech (harder to get), Aermec, Viessmann.. Daikin make great stuff but don’t get hung up on them being behind the curve and get into AWHPs now. I’ve been specifying them for 8-9 years now and bought a Chiltrix CX-50 for my house. Time to catch up with how to do better than dual fuel and no need to size heat pumps to cooling load!!!

Look at Spacepak AWHPs. But best for low temperature systems. You'll most likely need to upgrade any existing heat emitters.

What unit is that in the background? Is that a custom riser between the furnace and the coil? Is it a cold climate heatpump?

Does it matter in a dual fuel system whether the furnace is before or after the heat pump heat exchanger?

I’ve installed an ACIQ dual fuel unit rated for -22 degrees. It’s worked down to 9 degrees and the backup heat never called once. I’ve recently retired from heating and cooling and never had many people using heat pumps during the winter. For those wondering if they work, the answer is yes! Don’t listen to the bs from those who don’t actually use them.

I've been watching all your videos very interesting. I did not know technology had come far enough to make heat pumps available where I live. I grew up with heat pumps in washington state and my engineering class thermo books all reinforced the myth they only work in warmer climates.

Wouldn’t an inverter based system reduce the air conditioning load automatically adjust to avoid the issues that you identified?

Can you do a video on simultaneous heating and cooling in a residential setting? Two story homes often need ac upstairs and heat downstairs during shoulder seasons/shoulder hours. Moving the heat generated by air conditioning the upstairs and using it to warm the downstairs is a much more economical way to solve the problem than is running a furnace downstairs and an ac upstairs—you’re paying twice to condition your house. I know the commercial heat pumps have this feature but I don’t see it on the residential ones. Why not? Can I just install the commercial one in my house?

I have gas heating, but recently installed a 1ton heat pump as supplementary heating for my living room. I live in Oklahoma and one situation I realized that I would not be able to use my heatpump is during ice storms, which are not uncommon in Oklahoma. The ice would coat the outdoor unit and make it impossible to use. So while I am quite impressed with the performance of the heat pump for heating and saving on propane usage, I do not see giving up gas heating as an option for me.

I would like to replace the oil furnace with a dual fuel system but I will not get the incentive from coned if I don't get rid of the oil furnace. I am afraid to only use a heat pump because it gets cold in NY.

I'm in COS and just did a system replacement. I did the math heatpump and it would be WAAAAAY outside the system lifetime for ROI (which I'm told is 10-15yrs now, which is also crazy, they replaced a 40y/o unit), going from a single stage natgas furnace and SS 2 ton AC unit to a heat pump was going to double the cost and in very few circumstances is cheaper to run than the natgas furnace. So i agree you def need "dual fuel" out here, but I really don't see the point in heatpump. That money would be much better served going into new windows/weathersealing. Now we do have cheap gas here, and also our electric is natgas so there isn't any "climate" benefit for heatpumps either.....My house is small (1200sq/ft) but I'd think you would need something HUGE to justify this. I want to be clear, I went into this project thinking heatpump.... the shocker was the delta in system cost. I really don't see how a "reversing valve" ups the system price the way it does. I didn't even factor in the duckwork/blower, but I'm sure thats a thing too since the exchanger is so much cooler in a heatpump, needs more volume to make it up. What size homes do you service in denver that make the math work???? 5000+sq/ft??

I thought there's a law of physics that you cannot create or destroy energy only convert it? Why has no one won a award for this breakthrough technology.

I would not recommend putting ductwork and air handler in attic of older home in northern climate.

They do suck indeed especially Goodman