Aprilaire - 800 Whole-House Steam Humidifier
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Based on 1 year's data from Feb 24, 2026 How it works
Liked most:
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"steam humidification will absolutely blow anything out of the water. It's just much, much better and completely water efficent."
"steam humidification will absolutely blow anything out of the water. It's just much, much better and completely water efficent."
"We had to take out our old whole house humidifier and put in an 800 to be able to get our house well above 30% through the winter."
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"We had to take out our old whole house humidifier and put in an 800 to be able to get our house well above 30% through the winter."
"Aprilaire 800 is a steam humidifier and if wired properly will run your blower when the house needs humidity. ... However it will get a house to 30-40% RH"
"I'm wondering if just 1 AprilAire 800 will be enough for the whole house (~4000 sq ft)."
3
1
"They are a safe bet and fo have great performance and reliability for the price. Plus 5 year parts warranty on all aprilaire products. Ontop of that parts for out of warranty repairs are widely available."
"Mines worked flawless with basic maintenance for 5 years strong so🤷♂️"
"They are a safe bet and fo have great performance and reliability for the price."
3
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"Maintenance consists of a replacement canister once a year, like $100. However, it's pretty much maintenance-free otherwise."
"Maintenance consists of a replacement canister once a year, like $100. However, it's pretty much maintenance-free otherwise."
"Mines worked flawless with basic maintenance for 5 years strong so🤷♂️"
Disliked most:
0
2
"they designed it so if you have it installed they will cut out your wires and you will not be able to replace it with a normal thermostat without getting expensive wires repulled through your walls. ... The system uses a proprietary control panel with a touch screen that is not connect with the standard set of wires. They most definitely did cut the wires to interface the control panel at your furnace/air handler. There is no other way to wire it."
"Drawbacks of the 800 is its expensive to install"
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"they designed it so if you have it installed they will cut out your wires and you will not be able to replace it with a normal thermostat without getting expensive wires repulled through your walls. ... The system uses a proprietary control panel with a touch screen that is not connect with the standard set of wires. They most definitely did cut the wires to interface the control panel at your furnace/air handler. There is no other way to wire it."
0
1
"expensive to run (electric bill)"
"expensive to maintain"
0
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"expensive to run (electric bill)"
ajs2410 1.0Aprilaire 800 would recommend
Arsenichv 1.0Aprilaire 800 is awesome.
Derf_the_Taco 1.0Aprilair 800 is the best on the market
eneka 1.0It really depends on your house and how well sealed it is. We installed a aprilaire 720m and so far has kept our house at 40-45% consistently. But we have a new build, well sealed home. If you have an older leaky house, it may not perform as well. There’s the 800 steam version, but that will use a considerable amount of electricity.
Foundry_Heat_Pumps 1.0We install the Aprilaire 600M and 800, so I think you're on the right track. FWIW, we haven't had noise complaints with the 800. The location matters, and it also depends on how noisy the heat pump is when it's running. Is the medical condition just cause sensitivity too humidity? Or is there a bigger indoor air quality component that'll require better ventilation and filtration? And depending on the age of the house, air leakage, and location (climate), I'd be concerned about going above 50% relative humidity in winter. It may or may not be an issue where you live.
jwasilko 1.0We've had the aprilaire 800 steam humidifier for 12+ years now and really like it. It is expensive to run, but it keeps the house at our desired humidity.
We've had the AprilAire 800 for 12+ years now. I love it from both a performance and a maintenance perspective. Maintenance is super easy--just replace the cartridge every year or two and clean out the drain area (mine fills with minerals from the water).
kiddo459 1.0The Aprilaire 800 is an option, however, it’s gonna be more expensive. The unit itself is more expensive and it requires a lot more maintenance than a 700. And it uses quite a bit of electricity when running. Great performance though.
Kindly_Individual167 1.0I installed my own Aprilaire 800 No gurgle, works great. Depending on water quality- tank electrodes may need to be replaced more frequent
lannid39 1.0It’s definitely possible. I’d recommend a aprilare 800. It’d have to be mounted on the supply side of the furnace with the hydrometer on the return.
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