HVAC and plumbing in Baltimore, MD: who shows up online
We looked at the top 20 HVAC and plumbing companies Google shows for Baltimore. 100% have a website, and 65% of those sites tell search engines what kind of business they are.
The top 20 hvac and plumbing on Google, measured
- 100%have a website
- 65%of sites use LocalBusiness markup
- 45%of sites publish llms.txt
- 70%of sites run Google Analytics or Tag Manager
- 4.8★average Google rating
- 946median Google reviews
20 businesses from the Google results for “HVAC and plumbing company in Baltimore, MD”. 20 list a website; we checked the homepage of the 20 that loaded.
Who ChatGPT recommends
“Who is the best HVAC or plumbing company in Baltimore, MD?”
- Saffer Total Home
- Perry Hall Heating & Air Conditioning
- SuperTech HVAC Services
- A.J. Michaels
2 of the 20 businesses in the Google results were named. 2 recommendations were for businesses outside that list.
The review leaders
| Business | Rating | Reviews | Named by ChatGPT |
|---|---|---|---|
| Len The Plumber Heating & Air, LLC | 4.7 | 18239 | No |
| Michael & Son Services | 4.7 | 9248 | No |
| Horizon Services - Air Conditioning, Heating, Plumbing, & Electrical | 4.8 | 5209 | No |
| Beltway Air Conditioning, Heating & Plumbing | 4.9 | 2805 | No |
| Amazing Plumbing, Heating & Air | 4.8 | 2392 | No |
What this means for your shop
Only 45% of the sites we checked publish an llms.txt file for AI assistants.
The median shop in this list has 946 Google reviews.
ChatGPT named 2 of these 20 businesses when asked for a recommendation.
HVAC and plumbing in Baltimore: questions
What do most HVAC and plumbing companies in Baltimore miss online?
Structured data and AI files. 65% of sites have LocalBusiness markup and 45% have llms.txt.
How many reviews do the leading HVAC and plumbing companies in Baltimore have?
The median in this list is 946 reviews, with an average rating of 4.8.
How do I find out where my own business stands?
Request the free 42-point check. It checks 42 points, including what ChatGPT and Claude answer about your city.
Where does your business stand?
This page shows the market. The free diagnostic shows you: 42 points on your site, your Google profile and what ChatGPT and Claude say about you, with the competitors beating you by name. Usually in under an hour.
Method: HopperCat pulled the top Google results for “HVAC and plumbing company in Baltimore, MD” on October 22, 2026, checked each business homepage for HTTPS, mobile setup, LocalBusiness markup, llms.txt, AI-crawler rules and analytics, and asked ChatGPT the question above with web search on. Ratings and review counts are Google's at that date.