Castlewood Ascension 500 CFM Ventilator Insert
- Range Hood
A functional 500 CFM ventilator insert for a custom hood project, worth it mainly if you already have or are building the outer hood shell to house it.
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How it ranks among the 93 range hoods we track
0 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 93 range hoods we track - how the scorecard works · full range hoods data report. Confidence: limited - limited rating history.Last refreshed Jun 13, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The Castlewood Ascension SY-HVA-500-SS is a 500 CFM range hood ventilator insert built to mount under cabinet, with a stainless steel SS430 finish, 3 fan speeds, and 2 directional LED lights. It installs inside a hood shell rather than serving as a standalone visible hood.
As an insert, this unit is meant to sit hidden inside a wood or custom hood enclosure someone else builds, not to be the finished piece a buyer sees in the kitchen. The 6 inch outlet ships with a transition piece and backdraft damper for round ducting, and Castlewood rates it for cooktops up to 50,000 BTU, the figure to check against your range before buying. No rating or review data is available for this listing.
- 500 CFM, 3-speed ventilator insert
- SS430 stainless steel construction
- 6 inch outlet with backdraft damper transition piece included
- Rated for cooktops up to 50,000 BTU
Who it's for
Fits a custom range hood build where a carpenter or cabinet maker is constructing the visible shell and needs a ventilator insert to power it. Not a fit for someone who wants a complete, ready to mount hood with its own housing.
Strengths and trade-offs
Drawn from this product's published specifications.
- 500 CFM output with 3 speed settings
- Dishwasher safe aluminum mesh baffle filter
- Includes transition piece with backdraft damper for round ducting
- 2 directional LED lights included
- Insert only, requires a separate hood shell to install into
- Limited to cooktops up to 50,000 BTU
- No customer rating or review count listed
Performance notes
The 3-speed motor pushes up to 500 CFM through a 6 inch outlet, with a hybrid baffle filter using aluminum mesh that Castlewood states is dishwasher safe, and the included backdraft damper transition piece keeps outside air from being pulled back in when the fan is off. Castlewood caps this unit at cooktops rated 50,000 BTU or less.
Specifications
| Brand | Castlewood |
|---|---|
| Model | SY-HVA-500-SS |
Other Castlewood range hoods
How it compares
This product against the closest alternatives we track in range hoods.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Castlewood Ascension 500 CFM Ventilator InsertThis product | - | - | 2.7 / 5 |
| Broan-NuTone 413001 Non-Ducted Ductless Range Hood with Lights Exhaust Fan for Under…Broan-NuTone | 4.6 / 5 | 20,414 | 4.7 / 5 |
| COSMO COS-668ICS750 30 in. Lumin Collection 380 CFM Ducted Island Range HoodCOSMO | 4.4 / 5 | 2,369 | 4.3 / 5 |
| ZLINE 30" Convertible Vent Wall Mount Range Hood in Stainless SteelZLINE Kitchen and Bath | 4.4 / 5 | 956 | 4.3 / 5 |
| Wall Mount Range Hood 30 inch with Soft Touch Control in Stainless Steel & Tempered GlassCIARRA | 4.4 / 5 | 3,100 | 4.2 / 5 |
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Questions about the Castlewood SY-HVA-500-SS
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the Castlewood Ascension come with its own visible hood housing?
No, it is an insert meant to mount inside an existing or custom-built hood shell, not a standalone finished hood.
What size cooktop can this ventilator handle?
Castlewood rates it for cooktops up to 50,000 BTU output.
Is the filter dishwasher safe?
Yes, the hybrid baffle filter with aluminum mesh is listed as dishwasher safe.