r/hvacadvice is a subreddit with 239k members. The most common kinds of discussions are solution requests and advice requests, and the community frequently discusses ac, hvac, unit, noise, and struggling, and they frequently recommend/review smart thermostat, thermostat, and hvac.
A place for homeowners, renters, tenants, business owners or anyone with a general question about their HVAC system.
Please read rules before posting!
Popular Themes in r/hvacadvice
#1
Solution Requests
: "System is freezing up airflow seems to be fine what’s going on?"
15 posts
#2
Advice Requests
: "Evaporator coil failed and leaked all the refrigerant. The coil was under warranty, but my wife wants me to argue that the refrigerant should be covered too."
11 posts
#3
Pain & Anger
: "HVAC company came out 3 times, misdiagnosed twice, charged $880+ (Phoenix, AZ)"
4 posts
#4
Money Talk
: "Cost to replace HVAC system. Just got a $14K quote, is that normal?"
4 posts
#5
Opportunities
: "Trying to establish baseline before I get ripped off.."
1 post
Popular Topics in r/hvacadvice
#1
Ac
: "2015 Goodman 2.5 Ton Ac Can’t Maintain 72°F on 95-100°F Days.. Normal or Something Wrong?"
146 posts
#2
Hvac
: "2nd Floor Hvac Solutions in Minnesota"
144 posts
#3
Unit
: "Units from 1989"
93 posts
#4
Noise
: "What is this Noise?!"
38 posts
#5
Struggling
38 posts
#6
Furnace
: "Age my whirlpool AC unit…. We are having a new AC and Furnace installed tomorrow. The HVAC guy said the AC is at least 40 years old. Furnace just turned 20 years old in December so we are replacing together. We’ve been in the house 11 years so definitely got our money worth"
31 posts
#7
New
: "AC issues in New home"
30 posts
#8
Thermostat
: "New Thermostat wiring"
28 posts
#9
System
: "Cost to replace HVAC System. Just got a $14K quote, is that normal?"
24 posts
#10
Cooling
: "Carrier AC not Cooling anymore after 30 mins"
23 posts
Products Discussed in r/hvacadvice
Smart Thermostat
79 reviews
#1
Ecobee
4.4★ from 34 reviews
#2
Honeywell
3.8★ from 20 reviews
#3
Nest
3.4★ from 10 reviews
Thermostat
46 reviews
#1
Ecobee
4.4★ from 18 reviews
#2
Honeywell
4.2★ from 17 reviews
#3
Thermostat
1.0★ from 1 review
Hvac
15 reviews
#1
Ecobee
3.7★ from 3 reviews
#2
Trane
3.7★ from 3 reviews
#3
Honeywell
3.0★ from 2 reviews
Flair Used in r/hvacadvice
#1
AC
: "Evaporator coil failed and leaked all the refrigerant. The coil was under warranty, but my wife wants me to argue that the refrigerant should be covered too."
45 posts
#2
General
: "So that's why it smelled like dog"
11 posts
#3
Quotes
: "Cost to replace HVAC system. Just got a $14K quote, is that normal?"
6 posts
#4
Thermostat
: "Help with smart thermostat"
4 posts
#5
Heat Pump
: "System left on ‘Auto’ for 2 weeks now won’t heat"
4 posts
#6
No cooling
: "My AC stops working every 2 days."
3 posts
#7
Furnace
: "Furnace noise. Not sure what it is."
2 posts
#8
Filters
: "Friend was in the process of changing air filter and had to stop"
1 post
#9
Electrical
: "Compressor wiring arcing - refrigerant leak"
1 post
#10
Boiler
: "Adding radiators"
1 post
Member Growth in r/hvacadvice
Yearly
+73k members(44.3%)
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About
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Last updated: June 13, 2026