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Best picks

Best Furnace Upgrades Under $100

These picks come straight from the data: verified Amazon ratings, review counts, and prices we observed on recorded dates across 30 tracked products. No sponsored placements, no guesses. Prices last checked 2026-09-03.

As an Amazon Associate, this site earns from qualifying purchases. Product links are affiliate links, and prices and availability shown are accurate as of the date noted and can change. See our editorial policy for details.

Top rated

Filtrete 14x25x1 Air Filter, MERV 11, MPR 1000, Allergens & Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 2 HVAC Filters (Actual Size 13.68 x 24.68 x 0.81 in)

Highest Amazon rating among the products we track in this category.

Amazon rating: 4.8 across 58,265 ratings. Price observed: $30.37 on 2026-09-03.

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Lowest observed price

Upgraded Replacement 0130F00010 fits Goodman Furnace Flame Sensor B11726-06 (3 Pack)

Lowest price we observed among tracked products rated 4.0 or higher with 50+ ratings.

Amazon rating: 4.5 across 1,223 ratings. Price observed: $8.99 on 2026-09-03.

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Also worth a look

Filtrete 20x20x1 Air Filter, MERV 13 MPR 1900, Allergens, Bacteria, Viruses & Air Pollutants, 3-Month AC/Furnace Filters, Cleaner Air Reliable Airflow, 2 HVAC Filters(Act Size 19.62x19.62x0.78 in)

Next-highest Amazon rating among the products we track in this category.

Amazon rating: 4.8 across 17,298 ratings. Price observed: $31 on 2026-09-03.

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Everything we track in this category

Tracked products ranked by verified Amazon rating (prices observed 2026-09-03)
ModelAmazon ratingObserved priceChecked
Filtrete 16x25x1 Air Filter, MERV 11, MPR 1000, 6 HVAC Filters | Allergens & Pet Dander, 3-Month AC/Furnace Filters, Cleaner Air, Reliable Airflow, (Act. Size 15.68x24.68x0.81 in)4.8 (11,881 ratings)$61.992026-08-29
Filtrete 16x25x1 Air Filter, MERV 13 MPR 1900, Allergens, Bacteria, Viruses & Air Pollutants, 3-Month AC/Furnace Filters, Cleaner Air Reliable Airflow, 2 HVAC Filters (Act Size 15.62x24.62x0.78 in)4.8 (17,294 ratings)$29.992026-08-29
Filtrete 20x25x1 Air Filter, MERV 13, MPR 1900, 2 HVAC Filters | Allergens, Bacteria, Viruses & Air Pollutants, 3-Month AC/Furnace Filters, (Act. Size 19.62x24.62x0.78 in)4.8 (17,294 ratings)$36.992026-08-29
Filtrete 20x25x1 AC Furnace Air Filter, MERV 13, MPR 2200, Elite Allergen, Bacteria & Virus Filter, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 2-Pack (Actual Size 19.69x24.69x0.78 in)4.8 (1,079 ratings)$36.992026-08-29
Filtrete 14x25x1 Air Filter, MERV 11, MPR 1000, Allergens & Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 2 HVAC Filters (Actual Size 13.68 x 24.68 x 0.81 in)4.8 (58,265 ratings)$30.372026-09-03
Filtrete 20x20x1 Air Filter, MERV 13 MPR 1900, Allergens, Bacteria, Viruses & Air Pollutants, 3-Month AC/Furnace Filters, Cleaner Air Reliable Airflow, 2 HVAC Filters(Act Size 19.62x19.62x0.78 in)4.8 (17,298 ratings)$312026-09-03
Genteq Capacitor 10 UF MFD 370V 97F9002, 97F9002s (Replaces Old GE# 97F9002BZ3, Z97F9002, 27L669), 10 MFD at 370V, Oval4.8 (2,358 ratings)$11.222026-09-03
BNX TruFilter 20x20x1 Air Filter MERV 13 AC Filter, HVAC Furnace Filter, 4 Pack (ACTUAL SIZE 19.68"x19.68"x0.75") Allergies, Dust, Pet Dander & Smoke - MADE IN USA - MPR1500 / FPR 104.7 (11,347 ratings)$42.742026-09-03
BOJACK 45+5 uF 45/5 MFD ±6% 370V/440VAC CBB65 Dual Run Circular Start Capacitor for AC Motor Run or Fan Start or Condenser Straight4.7 (3,858 ratings)$21.92026-09-03
Criditpid 903404 621787 HVAC Furnace Draft Inducer Blower Motor Replacement Parts for Nordyne M1MB-070A-BW, Nortek, Intertherm Furnace.4.7 (83 ratings)$69.492026-09-03
Filtrete 16x20x1 AC Furnace Air Filter, MERV 8, MPR 700, Tough on Pollen, Easy on Airflow, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 4-Pack (Actual Size 15.688 x 19.688 x 0.78 in)4.7 (6,494 ratings)$45.142026-09-03
Genteq c3455r GE Round Capacitor 45 5 uf MFD, 97F9895, Z97F995, 97F9895BZ3, 27L880, 370V4.7 (4,435 ratings)$16.72026-09-03
Intermatic AG3000 HVAC Surge Protective Device, 120/240 VAC | UL Listed with TPMOV Technology, Type 4X Outdoor Enclosure, Dual LED Indicators4.7 (1,476 ratings)$73.472026-08-29
Kidde Carbon Monoxide Detector, 10-Year Battery Powered, Digital Display, LED Status Indicators, 85 dB Alarm, 3rd Edition4.7 (1,367 ratings)$49.692026-09-03
Kidde Carbon Monoxide Detector, AA Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable4.7 (19,855 ratings)$27.792026-09-03
Little Giant VCMA-15UL 115 Volt, 65 GPH, 1/50 HP Automatic Condensate Removal Pump for HVAC/Refrigeration Systems/Dehumidifiers (no safety switch), 6-Foot Cord, Black/White, 5544014.7 (5,301 ratings)$49.922026-09-03
ecobee SmartSensor 2-Pack - Temperature & Occupancy Sensor4.6 (8,743 ratings)$79.992026-09-03
Emerson H150 Universal Ignitor4.6 (985 ratings)$25.992026-08-29
FIRST ALERT CO605 Plug-in Carbon Monoxide Detector with Battery Backup, White4.6 (23,164 ratings)$23.992026-09-03
Little Giant VCMA-20ULS 115 Volt, 80 GPH, 1/30 HP Automatic Condensate Removal Pump for HVAC/Refrigeration Systems/Dehumidifiers with Overflow Detection Switch and 6-Foot Cord, White/Black, 5544254.6 (7,616 ratings)$67.052026-09-03
USA Furnace Ignitor Replaces Rheem - Ruud - Weatherking 62-22868-934.6 (2,981 ratings)$24.952026-09-03
Furnace Hot Surface Ignitor Direct Replacement for Carrier Bryant Payne OEM Part LH33ZS0044.6 (2,574 ratings)$19.312026-09-03
AG3000 HVAC Surge Protector, 120/240V AC, TPMOV Whole House Protection4.6 (79 ratings)$36.992026-09-03
Upgraded Replacement 0130F00010 fits Goodman Furnace Flame Sensor B11726-06 (3 Pack)4.5 (1,223 ratings)$8.992026-09-03
903404 - ClimaTek Furnace Inducer Motor Fits Nordyne, Intertherm, Miller4.4 (164 ratings)$67.52026-09-03
Honeywell Home 7 Day Programmable Touchscreen Thermostat4.4 (3,418 ratings)$79.652026-09-03
Honeywell Home RCHTSENSOR-1PK, Smart Room Sensor works with T9/T10 WIFI Smart Thermostats4.4 (3,320 ratings)$39.742026-09-03
Honeywell Home RTH7600D 7-Day Programmable Touchscreen Thermostat4.3 (9,281 ratings)$69.982026-09-03
Duralight Furnace Flame Sensor Universal Replacement For ICP - Heil - Comfortmaker - Tempstar 13806794.2 (38 ratings)$19.952026-08-29
Amazon Smart Thermostat, Save money and energy, Works with Alexa and Ring, C-wire required4.0 (25,448 ratings)$79.992026-09-03