Humidifier Solenoid
FailDemand is soft, at -67.0% this quarter, so Humidifier Solenoid is a Fail.
- Flapen Score
- 32 / 100Ranks 812 of 845 Appliances niches · −13 vs the category median of 4532
- Market size
- $102K/yr26K searches / yr
- 90-day growth
- -67.0%search demand this quarter
- Competition
- 100%top-5 click share · 4 brands · 15 sellers
Flapen Score
Humidifier Solenoid against its category
The dotted line is the Appliances average. Past it, Humidifier Solenoid is stronger. Inside it, weaker.
Market
The Humidifier Solenoid market on Amazon at a glance
Shoppers on Amazon United States searched for Humidifier Solenoid 26K times last year and spent an estimated $102K. All 4 brands take every click. Demand peaks in Jan–Feb–Nov–Dec. Flapen scores it 32 out of 100, a Fail.
01 · Demand
An estimated 11.8% of those searches ended in a purchase.
Shoppers searched for this 26K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 11.8% of those searches ended in a purchase. Searches in the last 90 days moved -67.0% against the 90 days before. Searches, conversion and average price together put the market at an estimated $102K a year.
- Searches, last 12 months
- 26K
- Growth, 90 days vs prior 90
- -67.0%
- Conversion, latest week
- 11.8%
- Market size, estimated
- $102Ka year
- Peak month
- December47.3× the quietest month
- Top search term
- aprilaire 4040 solenoid valve8K searches a year
02 · Price
A sale here is worth $33.28.
Listings sell for $33.28 on average, from $20.56 to $58.49. Amazon reports units sold in ranges. This niche sold 3K to 4K a year. The average listing sells 250 to 500 of them. At $33.28 that is $8K to $17K a year per listing.
- Average price
- $33.28inside the $15 to $100 sweet spot
- Price range
- $20.56–$58.49
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 3K–4K
- Units per listing a year
- 250–500
- Revenue per listing a year
- $8K–$17K
- Returns
- 7.6%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is ads.
100% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 1.4% of listings are out of stock. The average listing ranks #234 within Humidifier Parts & Accessories. It carries 598 reviews at 4.53 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 100%
- Prime listings
- 100%
- Out of stock, average day
- 1.4%
- Average rank
- #234in Humidifier Parts & Accessories
- Average rating
- 4.53 starsAmazon United States average 4.42 stars
- Average reviews
- 598per listing
- Listings tracked
- 4
04 · Newcomers
Brands here are established.
The brands on the shelf have sold for 74 months on average, so the names here are established.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 74 months
Products
Top Humidifier Solenoid products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 6, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
4040 Humidifier Solenoid Valve Replacement Part by AMI PARTS
- Price
- $25.34
- Rating
- 4.5/5
- Reviews
- 513
- Age
- 6y ago

AprilAire 4040 Solenoid Valve 24 Volt for AprilAire Whole House Humidifier Models 400 400M 500 500M 600 600M 558 550A 550 568 560A 560 700 700M 768 760A 760 0.5 ounces
- Price
- $58.49
- Rating
- 4.6/5
- Reviews
- 1,540
- Age
- 14y ago

4040 Humidifier Solenoid Replacement Water Valve A2012-S118 for Aprilaire
- Price
- $28.73
- Rating
- 4.6/5
- Reviews
- 153
- Age
- 2y ago

4040 Humidifier Water Solenoid Valve 24 Volts Humidifier Solenoid Valve Fit for Aprilaire Humidifier 240 400 500 600 700 B2015-S85 B2017-S85 Etc by Cenipar
- Price
- $20.56
- Rating
- 4.4/5
- Reviews
- 185
- Age
- 5y ago
Trending
estimated 90-day click momentum
4040 Humidifier Water Solenoid Valve 24 Volts Humidifier Solenoid Valve Fit for Aprilaire Humidifier 240 400 500 600 700 B2015-S85 B2017-S85 Etc by Cenipar
- Price
- $20.56
- Rating
- 4.4/5
- Reviews
- 185
- Age
- 5y ago

4040 Humidifier Solenoid Valve Replacement Part by AMI PARTS
- Price
- $25.34
- Rating
- 4.5/5
- Reviews
- 513
- Age
- 6y ago

AprilAire 4040 Solenoid Valve 24 Volt for AprilAire Whole House Humidifier Models 400 400M 500 500M 600 600M 558 550A 550 568 560A 560 700 700M 768 760A 760 0.5 ounces
- Price
- $58.49
- Rating
- 4.6/5
- Reviews
- 1,540
- Age
- 14y ago

4040 Humidifier Solenoid Replacement Water Valve A2012-S118 for Aprilaire
- Price
- $28.73
- Rating
- 4.6/5
- Reviews
- 153
- Age
- 2y ago
Newest
by launch date
4040 Humidifier Solenoid Replacement Water Valve A2012-S118 for Aprilaire
- Price
- $28.73
- Rating
- 4.6/5
- Reviews
- 153
- Age
- 2y ago

4040 Humidifier Water Solenoid Valve 24 Volts Humidifier Solenoid Valve Fit for Aprilaire Humidifier 240 400 500 600 700 B2015-S85 B2017-S85 Etc by Cenipar
- Price
- $20.56
- Rating
- 4.4/5
- Reviews
- 185
- Age
- 5y ago

4040 Humidifier Solenoid Valve Replacement Part by AMI PARTS
- Price
- $25.34
- Rating
- 4.5/5
- Reviews
- 513
- Age
- 6y ago

AprilAire 4040 Solenoid Valve 24 Volt for AprilAire Whole House Humidifier Models 400 400M 500 500M 600 600M 558 550A 550 568 560A 560 700 700M 768 760A 760 0.5 ounces
- Price
- $58.49
- Rating
- 4.6/5
- Reviews
- 1,540
- Age
- 14y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 100% of clicks. A locked shelf that new listings rarely crack.
Brands
4 flat
Sellers
15
Est. top-5 brand share
100%
Top 20: 100%
Est. top-5 click share
100%
Top 20: 100%
Open market
0%
- AMI PARTS44%
- Aprilaire37%
- PETOX10%
- Cenipar8%
- Open — no brand owns it (0%)
Demand
Humidifier Solenoid search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Jan, Feb, Nov, Dec · busiest ÷ quietest = 47.3×
Search terms
Top Humidifier Solenoid search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- aprilaire 4040 solenoid valve8K/yr
- humidifier solenoid4K/yr
- aprilaire solenoid valve5K/yr
- humidifier solenoid valve4K/yr
- aprilaire humidifier solenoid valve2K/yr
- aprilaire 600 solenoid valve2K/yr
Reviews and returns
What reviews say buyers love and hate about Humidifier Solenoid
We read the reviews and the return reasons for every product selling here.
“this is the second one that broke in less than 3 months of use”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
14 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Humidifier Solenoid questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









