Sub-Systems ServicesHVAC contractor in Huntsville, AL
Sub-Systems Services is an HVAC contractor at 2809 Cora Hill Ave NW, Huntsville, AL 35810, ranked #39 of 160 HVAC contractors in Huntsville and rated 5.0 from 3 Google reviews. Open 7 days a week.
Huntsville, ALUpdated 0 paid placements in any rankingHow we rank
Key facts
| Address | 2809 Cora Hill Ave NW, Huntsville, AL 35810Get directions |
|---|---|
| Phone | (256) 990-0316 |
| Website | sub-systems.com |
| Hours | Monday to Saturday: open 24 hours; Sunday: 2 PM – midnight |
| Google rating | 5.0 from 3 Google reviews |
Trades
Each trade shows the evidence we matched it on.
- HVACmain tradeGoogle main category
Service area
Serves Huntsville and 6 towns within 25 miles: Meridianville, Moores Mill, Madison, Harvest, Athens and Decatur.
Based in Huntsville, ALView on map
Opening hours
| Day | Hours |
|---|---|
| Monday | Open 24 hours |
| Tuesday | Open 24 hours |
| Wednesday | Open 24 hours |
| Thursday | Open 24 hours |
| Friday | Open 24 hours |
| Saturday | Open 24 hours |
| Sunday | 2 PM – midnightevening |
- Open evenings (after 6 PM)
- Open Saturdays
- Open Sundays
- Emergency service
Typical heating and cooling prices
| Job | Low | Typical | High |
|---|---|---|---|
| AC replacementPer system, installed (unit plus labor); typical range of customer-reported jobs. US national range | $3,887 | $5,978 | $8,073 |
| Furnace replacementPer system, installed; typical range of customer-reported jobs. US national range | $2,823 | $4,814 | $6,896 |
Market ranges for the trade, checked October 2026, not a quote from this business. Ask for a written estimate.
Compare nearby HVAC contractors
| Business | Rank | CR Score | Google rating | License verified | Saturday | Sunday | Distance away |
|---|---|---|---|---|---|---|---|
| Sub-Systems Services (this business) | — | 85 | 5.0 (3) | — | Yes | Yes | |
| HouseBee Heating and Cooling | #37 | 85 | 5.0 (15) | — | Yes | Yes | 8.0 mi |
| A1 Climate Control | #38 | 85 | 4.9 (31) | — | Yes | Yes | 5.0 mi |
| Spidel Heating and Cooling, LLC | #40 | 85 | 5.0 (160) | — | Yes | Yes | 19.3 mi |
Questions about Sub-Systems Services
How is Sub-Systems Services ranked in Huntsville?
Sub-Systems Services is ranked #39 of 160 HVAC contractors in Huntsville by CR Score, with 85 out of 100 as of October 2026. The score weighs reputation, credentials, review volume, recency, availability, trade focus, proximity and profile completeness. No business can pay to change its rank.
What are Sub-Systems Services’ hours?
Sub-Systems Services is open 7 days a week. Its listed hours are Monday to Saturday, open 24 hours; Sunday, 2 PM – midnight. On Saturdays it is open Open 24 hours, and on Sundays 2 PM to midnight. Hours come from the business listing; holiday hours may differ.
What areas does Sub-Systems Services serve?
Serves Huntsville and 6 towns within 25 miles: Meridianville, Moores Mill, Madison, Harvest, Athens and Decatur. The list is based on the business's location and the usual service radius for heating and cooling. Confirm your address is covered when you call.
What do Google reviews say about Sub-Systems Services?
Sub-Systems Services has a rating of 5.0 from 3 Google reviews. The CR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.
How do I contact Sub-Systems Services?
Call Sub-Systems Services on (256) 990-0316. The business is at 2809 Cora Hill Ave NW, Huntsville, AL 35810. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.
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Claiming is free. Correct your hours, trades and service area. The CR Score is recalculated from corrected data; payment never changes it.