Explore with us the Daikin Dual Fuel Heat Pump System with Humidification
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- Опубліковано 15 лют 2024
- Welcome to our Daikin dual fuel heat pump video! In this video, we'll dive deep into the world of dual fuel heating systems, also known as hybrid heating systems, and explore how they work, their benefits, and why they're gaining popularity among homeowners. We also dive into how a whole house humidifier works with this system.
A dual fuel system combines the efficiency of a heat pump with the reliability of a gas furnace, offering homeowners the best of both worlds when it comes to heating their homes. We'll break down the components of a dual fuel system, including the heat pump, furnace, and thermostat, and explain how they work together seamlessly to provide optimal comfort and energy efficiency year-round.
We'll also discuss the advantages of dual fuel systems, such as increased energy savings, improved comfort control, and reduced environmental impact. Whether you're considering upgrading your current HVAC system or curious about the benefits of dual fuel heating, this video has information you need to know to make an informed decision.
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Impressed with your knowledge. Do you serve Superior CO?
Hello thank you and yes we do serve Superior CO.
@@grantshvacOh good! I will be looking for a quote on a heat pump that can work with my Lennox furnace soon.
Please reach out when you would like a free estimate. @@DaveDugdaleColorado
@@grantshvacis that circular black device a manometer for the humidifier to detect airflow? Does that come with the Honeywell and tie in to the controller? If it detects airflow from the furnace blower the fan on the humidifier comes on?
Hello yes, the pressure switch you see is to prove there is airflow. It doesn't come with the humidifier it's a separate accessory. There are two ways to control the humidifier in this application. Either with the Daikin ONE thermostat or with the included Honeywell humidistat. Currently, the Daikin ONE thermostat does not support the ability to automatically change the humidification levels based on outdoor temperature. You can set the target humidity level and whether or not you want it to run without the heat call and the fan only. If we control it with the Daikin ONE thermostat, we do not need the air-proving switch you are talking about. Since this humidifier is being controlled by the Honeywell humidistat, the two controllers cannot communicate so we need to make sure there is air movement in the ductwork before we allow the humidifier to run. If the pressure switch does not close because the fan is off. The humidifier will not turn on even if there is a call for humidity. This protects moisture from building in the ductwork without airflow. @@DaveDugdaleColorado
Why not use the Daikin One thermostat to control humidity?
You can, but you lose some functionality of the humidifier. The Daikin ONE doesn't automatically adjust the humidity based on outdoor temperature. It also doesn't have an off button, just a minimum setting of 25%.
Thanks a lot for this rather informative video. What type of Humidifiers would you recommend with a heat pump/dual fuel setting? Fan assisted or bypass? Also, would you recommend Aprilaires 400 water saver model??
Hello vishalmittal1840 thank you for your feedback. Here is my opinion on the humidifiers you spoke of. The Honeywell HE250A is a bypass that I would recommend for a home up to around 3000 square feet depending on the tightness of the home. I would then recommend the Honeywell HE300A fan for a larger home and try to install it on the supply plenum side but there isn't always space. Also, hook the water supply up to the hotline for more humidity output. The reason is that the internal fan will pull air through the pad and the warmer that air is the more humidity it can release. For homes that are 4000 or more, I would definitely go with a steam humidifier but only hook up cold water to the water feed on steam humidifiers. I prefer Honeywell but AprilAire makes a good one as well.
The AprilAire 400 that you mentioned I would only use for a 2000 or less square foot home. That's because water just sits at the bottom of the tray and therefore most of the time just the bottom of the pad is wet. The Aprilaire 400 just doesn't put out much humidity but if you're in a smaller home with water restrictions or lack of a drain then the AprialAire 400 might be the way to go.
Lastly, I would say I don't pick the type of humidifier based on the system type for example dual-fuel or even just a standalone furnace. I pick the type based on the tightness and size of the home. That being said I do know that systems with heat pumps don't need as much run time on the humidifiers as the heat is not as hot. From my experience even in my own home as I have a VRV all electric heat pump system, my humidifier runs a lot less to maintain 40% humidity than it did when it was a gas-only furnace.
@@grantshvac thanks a lot for the detailed response. So should I understand that there is no problem having a bypass humidifier work with either a heat pump or gas furnace and it should work fine?
I have a 2400 sq ft house including basement with an old gas furnace but I may upgrade to a heat pump in the next couple years.
My main concern was if there would be less humidity output by a bypass humidifier and heat pump combo since humidification will depend on the heat/fan call per my limited understanding on the subject.
What also is important is how the humidifier is wired. We wire them to control the fan or use the air-proving switch and inform the customer about fan controls from the thermostat. Most HVAC companies in our area wire them to only work with the heat and unfortunately, most furnaces in our area are oversized causing short run times. So because of this, the humidifier doesn't run long enough to make a real effect. By having the fan control and or air-proving switch we can have the humidifier run without the heat giving time for the humidifier to bring humidity levels up.
Having a heat pump helps even more as heat pumps run longer and allow more time for the humidifier to run as well with the heat.
@@grantshvac oh heat pumps run longer than usual oversized furnaces? I wasn't aware of that. So I guess I should be fine with a bypass humidifier for a 2400 sq ft house. But given that flow through type humidifiers waste a lot of water I was hoping the water saver models like Aprilaire 400 may be worth looking but per your input that could be a bit short on capacity for my house.
I currently have inherited an older drum type Humidifier with the house and have been advised to change it to flow through type to avoid mould issues.
Do you know how much water such new bypass humidifiers may waste?
I looked up the water use of the Honeywell HE250A. The only thing I could find is that it saves 30% more water than traditional bypass humidifiers and it is rated at up to 17 gallons per day. The HE250A has water saving technology as it turns the water off and on periodically as not to waste so much water. @@vishalmittal1840
hey what surge protector did you use?
We reached out to our electrician, and they approved the following. www.supplyhouse.com/Intermatic-AG3000-1-Phase-Types-1-2-SPD-Protection-AC-Surge-Protector-120-240V
Is that 25°f? That doesn’t seem like much.
With the dual fuel systems we typically don’t run the heat pump down to colder temperatures. We can set it lower but we find that customers that want to have a gas furnace as well expect warmer supply temperatures. So this is mainly a comfort setting. We can set the heat pump lower if the customer requests it. It’s a conversational item during the proposal process.
The Daikin ONE thermostat will automatically switch over to the gas furnace if it detects it needs supplemental heat in a dual fuel set up.
Our all electric systems will run the Daikin FIT heat pump down to -10° but the supplemental heat kit may come on and off as needed while the heat pump is operational.
With the dual fuel systems the gas furnace can not run at the same time as the heat pump unlike the all electric systems.
@@grantshvac ok thanks.
@@kansascityshuffle8526 Some heat pumps have the capability of running down to 0º or even lower. However, it's important to note that the Daikin FIT unit is rated down to -10º as per Daikin's recommendations, but it doesn't necessarily mean that it will keep up with the load. A load calculation using a Manual J can provide you with much more accurate information. In most cases, heat pumps should be sized for the cooling load, so keep that in mind. Additionally, it's crucial to factor in the cost of your gas versus your electric when deciding which system to install.
@@grantshvac thanks i guess you saw my deleted portions of my last comment. I didn’t see your initial comment in its entirety before I posted. You actually answered most of my questions and I should have been more attentive. Definitely think the heat pump/cooling unit is the way to go. I think the manual J is a good idea. Does it pay to have more than one done?
@@kansascityshuffle8526 Usually not for the Manual J. However, I have seen other HVAC contractors get multiple Manual D reports as there is a lot behind the settings of the software on doing the ductwork design. Manual Js are usually pretty straightforward.