In Frederick County? We'll get to you within 4 Hours!
In Frederick County?
We'll get to you within 4 Hours!
Available 24/7
Available 24/7
Available 24/7
Find your perfect hVAC match
Some contractors just glance at your 20-year-old system and blindly quote an equivalent model. That’s why the upgrade never feels “new.”
Don’t get stuck with the wrong system for the next decade.
Get a custom system designed for your lifestyle, energy use, and financial goals by our licensed, certified HVAC experts. Normally $297, now $0 for a limited time
Some companies offer “free” service calls and make their money back by selling you a new system—even when it’s an easy fix.
At GSSN, we don’t allow our technicians to upsell a system just to pad the bill. You’ll get an honest diagnosis, every time.
Let our licensed & certified techs diagnose your system for just $100.
Installed same-day – by local, factory-certified techs who respect your home
Installed same-day – by local, factory-certified techs who respect your home
Installed same-day – by local, factory-certified techs who respect your home
Up to 12 year parts & labor warranty – That's $0 on you if it ever breaks.
Comes with a 1-Year labor & parts warranty – we fix it right the first time.
Up to 12 year parts & labor warranty – That's $0 on you if it ever breaks.
100% satisfaction guarantee – Only pay when you're 100% happy :)
100% satisfaction guarantee – Only pay when you're 100% happy :)
100% satisfaction guarantee – Only pay when you're 100% happy :)
Ready to find your perfect match?
Ready to find your perfect match?
Ready to find your perfect match?
Just fill this out, and we’ll get back to you ASAP to send an HVAC expert to your home.
By submitting this form, you agree to receive text messages. Msg & data rates may apply. Privacy Policy & Terms of Use
“Angel & Nick were extremely helpful & prompt. Weren’t trying to sell me anything, were sincerely only interested in fixing my problem according to my needs.” Read on Google
Billy Edwards
“Very pleasant experience! They are very knowledgeable and professional. During my appointment they walked me through all code problems and educated me on everything they found. I would definitely recommend!” Read on Google
Brian Bushey
“AC shut down so I put in a request with AHS. Sean showed up on time and fixed the issue quickly. Thankful for the quick fix and information he provided me. Hopefully I can prevent this issue in the future.” Read on Google
Joe McFadden
“Angel & Nick were extremely helpful & prompt. Weren’t trying to sell me anything, were sincerely only interested in fixing my problem according to my needs.” Read on Google
Billy Edwards
“Very pleasant experience! They are very knowledgeable and professional. During my appointment they walked me through all code problems and educated me on everything they found. I would definitely recommend!” Read on Google
Brian Bushey
“AC shut down so I put in a request with AHS. Sean showed up on time and fixed the issue quickly. Thankful for the quick fix and information he provided me. Hopefully I can prevent this issue in the future.” Read on Google
Joe McFadden
“Angel & Nick were extremely helpful & prompt. Weren’t trying to sell me anything, were sincerely only interested in fixing my problem according to my needs.” Read on Google
Billy Edwards
“Very pleasant experience! They are very knowledgeable and professional. During my appointment they walked me through all code problems and educated me on everything they found. I would definitely recommend!” Read on Google
Brian Bushey
“AC shut down so I put in a request with AHS. Sean showed up on time and fixed the issue quickly. Thankful for the quick fix and information he provided me. Hopefully I can prevent this issue in the future.” Read on Google
Joe McFadden
“Angel & Nick were extremely helpful & prompt. Weren’t trying to sell me anything, were sincerely only interested in fixing my problem according to my needs.” Read on Google
Billy Edwards
“Very pleasant experience! They are very knowledgeable and professional. During my appointment they walked me through all code problems and educated me on everything they found. I would definitely recommend!” Read on Google
Brian Bushey
“AC shut down so I put in a request with AHS. Sean showed up on time and fixed the issue quickly. Thankful for the quick fix and information he provided me. Hopefully I can prevent this issue in the future.” Read on Google
Joe McFadden
“Angel & Nick were extremely helpful & prompt. Weren’t trying to sell me anything, were sincerely only interested in fixing my problem according to my needs.” Read on Google
Billy Edwards
“Very pleasant experience! They are very knowledgeable and professional. During my appointment they walked me through all code problems and educated me on everything they found. I would definitely recommend!” Read on Google
Brian Bushey
“AC shut down so I put in a request with AHS. Sean showed up on time and fixed the issue quickly. Thankful for the quick fix and information he provided me. Hopefully I can prevent this issue in the future.” Read on Google
Joe McFadden
“Angel & Nick were extremely helpful & prompt. Weren’t trying to sell me anything, were sincerely only interested in fixing my problem according to my needs.” Read on Google
Billy Edwards
“Very pleasant experience! They are very knowledgeable and professional. During my appointment they walked me through all code problems and educated me on everything they found. I would definitely recommend!” Read on Google
Brian Bushey
“AC shut down so I put in a request with AHS. Sean showed up on time and fixed the issue quickly. Thankful for the quick fix and information he provided me. Hopefully I can prevent this issue in the future.” Read on Google
Joe McFadden
“Angel & Nick were extremely helpful & prompt. Weren’t trying to sell me anything, were sincerely only interested in fixing my problem according to my needs.” Read on Google
Billy Edwards
“Very pleasant experience! They are very knowledgeable and professional. During my appointment they walked me through all code problems and educated me on everything they found. I would definitely recommend!” Read on Google
Brian Bushey
“AC shut down so I put in a request with AHS. Sean showed up on time and fixed the issue quickly. Thankful for the quick fix and information he provided me. Hopefully I can prevent this issue in the future.” Read on Google
Joe McFadden
“Angel & Nick were extremely helpful & prompt. Weren’t trying to sell me anything, were sincerely only interested in fixing my problem according to my needs.” Read on Google
Billy Edwards
“Very pleasant experience! They are very knowledgeable and professional. During my appointment they walked me through all code problems and educated me on everything they found. I would definitely recommend!” Read on Google
Brian Bushey
“AC shut down so I put in a request with AHS. Sean showed up on time and fixed the issue quickly. Thankful for the quick fix and information he provided me. Hopefully I can prevent this issue in the future.” Read on Google
Joe McFadden
“Angel & Nick were extremely helpful & prompt. Weren’t trying to sell me anything, were sincerely only interested in fixing my problem according to my needs.” Read on Google
Billy Edwards
“Very pleasant experience! They are very knowledgeable and professional. During my appointment they walked me through all code problems and educated me on everything they found. I would definitely recommend!” Read on Google
Brian Bushey
“AC shut down so I put in a request with AHS. Sean showed up on time and fixed the issue quickly. Thankful for the quick fix and information he provided me. Hopefully I can prevent this issue in the future.” Read on Google
Joe McFadden
“Angel & Nick were extremely helpful & prompt. Weren’t trying to sell me anything, were sincerely only interested in fixing my problem according to my needs.” Read on Google
Billy Edwards
“Very pleasant experience! They are very knowledgeable and professional. During my appointment they walked me through all code problems and educated me on everything they found. I would definitely recommend!” Read on Google
Brian Bushey
“AC shut down so I put in a request with AHS. Sean showed up on time and fixed the issue quickly. Thankful for the quick fix and information he provided me. Hopefully I can prevent this issue in the future.” Read on Google
Joe McFadden
“Angel & Nick were extremely helpful & prompt. Weren’t trying to sell me anything, were sincerely only interested in fixing my problem according to my needs.” Read on Google
Billy Edwards
“Very pleasant experience! They are very knowledgeable and professional. During my appointment they walked me through all code problems and educated me on everything they found. I would definitely recommend!” Read on Google
Brian Bushey
“AC shut down so I put in a request with AHS. Sean showed up on time and fixed the issue quickly. Thankful for the quick fix and information he provided me. Hopefully I can prevent this issue in the future.” Read on Google
Joe McFadden
“Angel & Nick were extremely helpful & prompt. Weren’t trying to sell me anything, were sincerely only interested in fixing my problem according to my needs.” Read on Google
Billy Edwards
“Very pleasant experience! They are very knowledgeable and professional. During my appointment they walked me through all code problems and educated me on everything they found. I would definitely recommend!” Read on Google
Brian Bushey
“AC shut down so I put in a request with AHS. Sean showed up on time and fixed the issue quickly. Thankful for the quick fix and information he provided me. Hopefully I can prevent this issue in the future.” Read on Google
Joe McFadden
“Angel & Nick were extremely helpful & prompt. Weren’t trying to sell me anything, were sincerely only interested in fixing my problem according to my needs.” Read on Google
Billy Edwards
“Very pleasant experience! They are very knowledgeable and professional. During my appointment they walked me through all code problems and educated me on everything they found. I would definitely recommend!” Read on Google
Brian Bushey
“AC shut down so I put in a request with AHS. Sean showed up on time and fixed the issue quickly. Thankful for the quick fix and information he provided me. Hopefully I can prevent this issue in the future.” Read on Google
Joe McFadden
“Angel & Nick were extremely helpful & prompt. Weren’t trying to sell me anything, were sincerely only interested in fixing my problem according to my needs.” Read on Google
Billy Edwards
“Very pleasant experience! They are very knowledgeable and professional. During my appointment they walked me through all code problems and educated me on everything they found. I would definitely recommend!” Read on Google
Brian Bushey
“AC shut down so I put in a request with AHS. Sean showed up on time and fixed the issue quickly. Thankful for the quick fix and information he provided me. Hopefully I can prevent this issue in the future.” Read on Google
Joe McFadden
“Angel & Nick were extremely helpful & prompt. Weren’t trying to sell me anything, were sincerely only interested in fixing my problem according to my needs.” Read on Google
Billy Edwards
“Very pleasant experience! They are very knowledgeable and professional. During my appointment they walked me through all code problems and educated me on everything they found. I would definitely recommend!” Read on Google
Brian Bushey
“AC shut down so I put in a request with AHS. Sean showed up on time and fixed the issue quickly. Thankful for the quick fix and information he provided me. Hopefully I can prevent this issue in the future.” Read on Google
Joe McFadden
“Angel & Nick were extremely helpful & prompt. Weren’t trying to sell me anything, were sincerely only interested in fixing my problem according to my needs.” Read on Google
Billy Edwards
“Very pleasant experience! They are very knowledgeable and professional. During my appointment they walked me through all code problems and educated me on everything they found. I would definitely recommend!” Read on Google
Brian Bushey
“AC shut down so I put in a request with AHS. Sean showed up on time and fixed the issue quickly. Thankful for the quick fix and information he provided me. Hopefully I can prevent this issue in the future.” Read on Google
Joe McFadden
Why GSSN's In-Home Consultation?
Why GSSN's In-Home Consultation?
Why GSSN's In-Home Consultation?
FAQs
FAQs
FAQs
FAQs
How does GSSN design the "perfect match?"
How does GSSN design the "perfect match?"
How does GSSN design the "perfect match?"
How does GSSN design the "perfect match?"
Why is it $0 instead of $297?
Why is it $0 instead of $297?
Why is it $0 instead of $297?
Why is it $0 instead of $297?
What happens after I get my perfect-fit options?
What happens after I get my perfect-fit options?
What happens after I get my perfect-fit options?
What happens after I get my perfect-fit options?
What if I don't like any of the options?
What if I don't like any of the options?
What if I don't like any of the options?
What if I don't like any of the options?
Certified by the best in our industry
Certified by the best in our industry
Certified by the best in our industry
Certified by the best in our industry
© OpenStreetMap contributors
© OpenStreetMap contributors
© OpenStreetMap contributors
Service Area
Service Area
Proudly Serving Only Frederick County Residents
Proudly Serving Only Frederick County Residents
Our expert technicians are laser-focused on Frederick County — serving only our local neighbors and families. By staying local, we guarantee fast, reliable service and deep familiarity with the homes and systems in our area.
That’s how we can get to any home in 4 hours or less.
Our expert technicians are laser-focused on Frederick County — serving only our local neighbors and families.
That’s how we can get to any home in 4 hours or less.
Our expert technicians are laser-focused on Frederick County — serving only our local neighbors and families.
That’s how we can get to any home in 4 hours or less.
Why Frederick County Trusts GSSN with Their Homes
A veteran, family-owned business since 2009, we’ve earned the trust of our neighbors in the county — not through fancy marketing, but by treating every home like it’s our own.
A veteran, family-owned business since 2009, we’ve earned the trust of our neighbors in the county — not through fancy marketing, but by treating every home like it’s our own.
A veteran, family-owned business since 2009, we’ve earned the trust of our neighbors in the county — not through fancy marketing, but by treating every home like it’s our own.
A veteran, family-owned business since 2009, we’ve earned the trust of our neighbors in the county — not through fancy marketing, but by treating every home like it’s our own.
We Show Up On Time
We Show Up On Time
Our team calls ahead, arrives on time, and gets the job done right. No more waiting around all day wondering if anyone's actually coming.
Our team calls ahead, arrives on time, and gets the job done right. No more waiting around all day wondering if anyone's actually coming.
Your Home Stays Pristine
Your Home Stays Pristine
Drop cloths, boot covers, and a thorough cleanup. You'd never know we were there — except for the perfectly working system.
Drop cloths, boot covers, and a thorough cleanup. You'd never know we were there — except for the perfectly working system.
Straight Talk, Fair Prices
Straight Talk, Fair Prices
We explain what's wrong in plain English. No pressure, no invented problems. If it's a simple fix, we'll tell you. Even if it means less money for us.
We explain what's wrong in plain English. No pressure, no invented problems. If it's a simple fix, we'll tell you. Even if it means less money for us.
Real Experts
Real Experts
Factory-trained techs who actually know what they're doing. They'll walk you through everything — no guesswork, no YouTube repairs.
Factory-trained techs who actually know what they're doing. They'll walk you through everything — no guesswork, no YouTube repairs.
Your Home Deserves the Most
Trusted Name in Heating & Cooling
Your Home Deserves the Best
Need a new system? Don't worry. GSSN is a proud Daikin Comfort Pro, meaning you get the #1 HVAC system, trusted by millions of homeowners.
They are the pioneers in HVAC, and the scientists behind YOUR perfect comfort.
Available 24/7, Including Weekends
© 2025 GSSN Heating & Cooling, All Right Reserved. Privacy Policy Terms of Use
Available 24/7, Including Weekends
© 2025 GSSN Heating & Cooling, All Right Reserved. Privacy Policy Terms of Use
Available 24/7, Including Weekends
© 2025 GSSN Heating & Cooling, All Right Reserved. Privacy Policy Terms of Use
Available 24/7, Including Weekends