---
title: "Humidifier Solenoid — $116K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/appliances/humidifier-solenoid"
last_updated: "2026-08-09T08:53:45.741Z"
locale: en
meta:
description: "Niche score 32/100 · $116K/yr market · 26K searches/yr · $33.37 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 32/100 · $116K/yr market · 26K searches/yr · $33.37 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Humidifier Solenoid — $116K/yr Amazon US Niche (2026) - Flapen"
---
# **humidifier solenoid**
**Skip it**
Soft demand (-89.1% this quarter) — this niche doesn't clear our bar today.
Market size 27Growth 0Conversion 96Competition 0Returns 16Price range 95Avg price 95Brand share 0Review moat 73Quality gap 37
**Conversion**
**Incredible****13.3%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Incredible****$33.37**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$20.82–$58.55**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Good****592.5**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Market size**
**Okay****$116K**
$116K/yr · 26K searches
**Returns**
**Bad****7.6%**
return rate — above 5% kills the launch gate
**Growth**
**Bad****-89.1%**
90-day search growth — must beat 0% to launch
**Competition**
**Bad****100%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
**Signals**[** High Returns**](https://flapen.com/research/niches?market=us&signal=high_returns "Return rate > 5%")
According to Flapen's Amazon United States niche tracking, humidifier solenoid is a $116K/yr Amazon United States market (26K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jan–Feb–Nov–Dec. Verdict: Skip it — 32/100.
Data updated Jul 6, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **humidifier solenoid market data**
- **Units sold / yr**
- **3K–4K**
- avg 250–500/product
- **Revenue / yr**
- **$100K–$133K**
- units × avg price
- **Conversion rate**
- **13.3%**
- **Avg BSR**
- **#216**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **1.4%**
- **Avg brand age**
- **71 months**
- **Avg seller age**
- **197 days**
## **Competition & brand share**
The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**4 **—flat
**Sellers**
**15**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**100%**
Top 20: 100%
**Open market**
**0%**
- AMI PARTS44% - Aprilaire39% - PETOX9% - Cenipar8% - Open — no brand owns it (0%)
## **Demand & seasonality**
Weekly Amazon search volume, last 74 weeks — -89.1% search growth over the last 90 days.
2K1KPrime Day '25Spike '25Black Friday '25Holiday '25Spike '26 seasonMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJunJul
Peak months: Jan, Feb, Nov, Dec · busiest ÷ quietest = 47.3×
[**Open Trend **](https://flapen.com/research/us/appliances/humidifier-solenoid/trend)
## **Top humidifier solenoid search terms**
- **aprilaire 4040 solenoid valve**8K/yr-90.3%13.7% conv. - **humidifier solenoid**4K/yr-81.8%2.9% conv. - **aprilaire solenoid valve**5K/yr-87.8%3.4% conv. - **humidifier solenoid valve**4K/yr-91.5%0.0% conv. - **aprilaire humidifier solenoid valve**2K/yr-92.0%2.6% conv. - **aprilaire 600 solenoid valve**2K/yr-95.3%10.0% conv. [**All search terms **](https://flapen.com/research/us/appliances/humidifier-solenoid/search-terms)
## **Top humidifier solenoid products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%15%$17K30%$35K45%$52K60%$70K1001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 4 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**4040 Humidifier Solenoid Valve Replacement Part by AMI PARTS**AMI PARTS**$25.38**4.5★511 rev](https://www.amazon.com/dp/B07XLLXQHN) [2**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**Aprilaire**$58.55**4.6★1,540 rev](https://www.amazon.com/dp/B00NVPTWXM) [3**4040 Humidifier Solenoid Replacement Water Valve A2012-S118 for Aprilaire**PETOX**$28.74**4.6★153 rev](https://www.amazon.com/dp/B0CJLGCFFJ) [4**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**Cenipar**$20.82**4.4★166 rev](https://www.amazon.com/dp/B08MZNNYJQ)
### **Newest**
by launch date
[**4040 Humidifier Solenoid Replacement Water Valve A2012-S118 for Aprilaire**PETOX**$28.74**153 rev2y ago](https://www.amazon.com/dp/B0CJLGCFFJ) [**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**Cenipar**$20.82**166 rev5y ago](https://www.amazon.com/dp/B08MZNNYJQ) [**4040 Humidifier Solenoid Valve Replacement Part by AMI PARTS**AMI PARTS**$25.38**511 rev6y ago](https://www.amazon.com/dp/B07XLLXQHN) [**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**Aprilaire**$58.55**1,540 rev14y ago](https://www.amazon.com/dp/B00NVPTWXM)
### **Trending**
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**Cenipar**$20.82**4.4★**▲ 255%**](https://www.amazon.com/dp/B08MZNNYJQ) [**4040 Humidifier Solenoid Valve Replacement Part by AMI PARTS**AMI PARTS**$25.38**4.5★**▲ 38%**](https://www.amazon.com/dp/B07XLLXQHN) [**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**Aprilaire**$58.55**4.6★**— 3%**](https://www.amazon.com/dp/B00NVPTWXM) [**4040 Humidifier Solenoid Replacement Water Valve A2012-S118 for Aprilaire**PETOX**$28.74**4.6★**▼ 64%**](https://www.amazon.com/dp/B0CJLGCFFJ)
## **What buyers say about humidifier solenoid**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**16%
*“Fit perfectly”*
**Quality-Overall**16%
*“Well made part”*
**Efficiency**15%
*“Works great”*
**Advertised Vs Actual Product**15%
*“My item was exactly what I ordered”*
**Spray/Flow**9%
*“Works good as water flows better”*
**Value For Money**7%
*“Great Product at a Decent Price”*
**Product Condition**4%
*“Just like new”*
**Material Quality**4%
*“High Quality Materials - Easy to install”*
**Locally Manufactured**4%
*“Yes, the part is made in China, so after about 2 months or so it's working perfectly”*
**Functionality-Overall**4%
*“and works just fine”*
### **What buyers complain about **
**Durability**28%
*“this is the second one that broke in less than 3 months of use”*
**Quality-Overall**22%
*“Quality is very poor - Failed to function after 9 months”*
**Defective Material/Parts**17%
*“Part bad out of box”*
**Functionality-Overall**11%
*“I sent the first one back thinking it was bad”*
**Product Condition**11%
*“seemed like it was previously used”*
**Leak-Proof**11%
*“one of the connecting ends had developed a leak”*
### **Top return reasons **
**Functionality-Overall**17%
**Compatibility-Overall**16%
**Size-Overall**16%
**Defective Material/Parts**12%
**Advertised Vs Actual Product**11%
**Product Condition**7%
**Maintenance And Repair**3%
**Durability**3%
**Connectivity-Overall**3%
**Assembly/Installation**2%
## **Common questions**
- **Is humidifier solenoid profitable to sell on Amazon United States?**
- The niche generates $116K/yr across 4 tracked products. 90-day search growth is -89.1%. Flapen's verdict: Skip it (32/100).
- **How competitive is the humidifier solenoid niche?**
- 4 brands and 15 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
- **What do buyers complain about in humidifier solenoid?**
- Top complaints mined from reviews: Durability, Quality-Overall, Defective Material/Parts. The return rate is 7.6% — above our launch gate.
- **When does demand for humidifier solenoid peak?**
- Demand peaks in Jan–Feb–Nov–Dec; the busiest month runs 47.3× the quietest.
- **What does it cost to enter the humidifier solenoid niche?**
- Listings span $20.82–$58.55; the average listing price is $33.37 (sweet spot $15–$100). The average incumbent carries 593 reviews — the moat a new listing must climb.
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