---
product_id: 127952423
title: "No Toil, Castle One-Year HVAC Furnace Filter, 20\" x 30\" x 1\""
brand: "castle filters"
price: "€ 98.23"
currency: EUR
in_stock: true
url: https://www.desertcart.fi/products/127952423-no-toil-castle-one-year-hvac-furnace-filter-20-x
store_origin: FI
region: Finland
---

# 1-year lifespan MERV 8 rating Patented tech No Toil, Castle One-Year HVAC Furnace Filter, 20" x 30" x 1"

**Brand:** castle filters
**Price:** € 98.23
**Availability:** ✅ In Stock

## Summary

> 🏰 Breathe like royalty with Castle Filters!

## Quick Answers

- **What is this?** No Toil, Castle One-Year HVAC Furnace Filter, 20" x 30" x 1" by castle filters
- **How much does it cost?** € 98.23 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/127952423-no-toil-castle-one-year-hvac-furnace-filter-20-x)

## Best For

- castle filters enthusiasts

## Why This Product

- Trusted castle filters brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Breathe Easy:** Experience cleaner air with 93% dust removal efficiency.
- • **Proudly American:** Manufactured in the USA with patented technology.
- • **Innovative Design:** 3-layer foam technology traps dust like fly paper.
- • **Eco-Friendly Choice:** Reduce waste and save energy with every breath.
- • **Long-Lasting Performance:** Lasts up to 1 year—4-12x longer than standard filters.

## Overview

The Castle Filters One-Year HVAC Furnace Filter features patented 3-layer foam technology that effectively captures 93% of harmful dust particles while allowing maximum airflow. With a MERV 8 rating, this filter lasts up to one year, significantly reducing waste and energy consumption compared to standard filters. Proudly made in the USA, it combines innovation with sustainability for a cleaner, healthier home.

## Description

No Toil, Castle One-Year HVAC Furnace Filter, 20" x 30" x 1"

## Features

- Patented Filter Technology: Castle Filters use 3 layers of ¼-inch open-celled foam, with a patented tacky center layer that catches dust like fly paper. Proudly made in USA - US patent #10,183,249 B2
- MERV 8: The High-Flow MERV 8 air filter effectively removes 93% of the most harmful dust particles and offers superior protection of your equipment and home while still allowing maximum air-flow
- HVAC Filter: Castle Filters have 400% more surface area for dust and other particles to collect. The internal foam is treated with a sticky material to collect more dust while letting the air pass through
- Lasts One Year: The furnace filter holds up to 20 times more dust than a pleated filter. While pleated filters need to be replaced about once a month, the Castle Air Filter lasts one year which is 4-12x longer than the others
- Save Energy and Lower Land Fill Contribution: Castle Air Filter helps you save energy with its advanced filtration technology and also helps in generating less waste as it need not be changed every month like a standard filter

## Images

![No Toil, Castle One-Year HVAC Furnace Filter, 20" x 30" x 1" - Image 1](https://m.media-amazon.com/images/I/81iMkRP9TvL.jpg)
![No Toil, Castle One-Year HVAC Furnace Filter, 20" x 30" x 1" - Image 2](https://m.media-amazon.com/images/I/712cRRqnQsL.jpg)
![No Toil, Castle One-Year HVAC Furnace Filter, 20" x 30" x 1" - Image 3](https://m.media-amazon.com/images/I/71+rRJ9Xt1L.jpg)
![No Toil, Castle One-Year HVAC Furnace Filter, 20" x 30" x 1" - Image 4](https://m.media-amazon.com/images/I/81Bir4SPUjL.jpg)

## Available Options

This product comes in different **Pattern Name, Style** options.

## Questions & Answers

**Q: How do you determine the point at which it fails?**
A: They are supposed to last for 1 year - I've had mine almost a year and it seems to be doing the job. I live in Arizona so my a/c runs 24 hours a day during May thru Oct (almost 6 months out of the year) so this particular filter is my first choice. I love it! Hope this helps!

**Q: Do you make 12x12 and 12x24?**
A: Does it help with cat hair and cigarette smoke

**Q: Does this work for one year?**
A: YES. All the Castle filter have a 1 year  rating. Tests from a independent lab (LMS labs MN.) Show that a standard pleated filter hold a little as 5.2 grams of dust before failing. The Castle Filter holds 123 grams of dust before failing. You would have to buy up to 20 pleated filter to hold the dust of one Castle Filter. Castle filter have been used in very dirty area like Phonenix AZ, and lasted one year with no service. If you desire you can service your Castle filter as many times in a year as you what. If you have a very dirty area pets, duct on floor you can vacuum your Castle filter with a Furniture brush. This will not remove the anti-microbiales in your filter that reduce mold growth.

**Q: I read it's treated to prevent mold growth but does this filter mold spores?**
A: Mold spores can get down to the 10 micron and smaller size range.  Castle Filters capture about 95% of 10 micron particles, and about 90% of 5 micron particles.

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**Shop now:** [https://www.desertcart.fi/products/127952423-no-toil-castle-one-year-hvac-furnace-filter-20-x](https://www.desertcart.fi/products/127952423-no-toil-castle-one-year-hvac-furnace-filter-20-x)

---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-02*