Not a call center. Not a franchise. Three generations of the same Baltimore family — we remember your house and your history with us.
No Commission. Ever.
Our technicians are never paid on what they sell. The recommendation you get is what your system actually needs.
No Corners Cut
95 years of reputation is worth more than a shortcut. We do the job right the first time, every time.
Family Since 1929
Frank J. Klein founded this company. His family still runs it. Same values, same craft, same northwest Baltimore community.
What Customers Say
What Baltimore Families Say
4.9
★★★★★22 reviews · Google & Angi
★★★★★
"We've been dealing with them for 20–30 years. They always show up in the time window they give you. Every single time."
Patricia L.Long-term customer · Angi
★★★★★
"Arrived right on time, explained each step. Checked fan blades, coils, capacitors. Nothing skipped."
Robert M.Verified customer · Angi
★★★★★
"Courteous and respectful. No debris left. The new unit is extremely quiet. These are people you can trust in your home."
Susan K.Verified customer · Angi
A Smarter Choice
Geothermal Heating & Cooling
Klein is one of very few contractors in the Baltimore area who installs and services geothermal systems — a significant advantage for environmentally-minded homeowners in older homes.
Up to 65% less energyReduces utility bills year-round vs. conventional systems.
25+ year lifespanGround loop rated 50+ years. Outlasts conventional HVAC.
Works in older homesIntegrates with existing radiator and forced-air systems.
Our Territory
Rooted in Northwest Baltimore Since Day One
Based at 300 Reisterstown Rd in Pikesville — right in the heart of the communities we've served since 1929.
PikesvilleOwings MillsTowsonLuthervilleReisterstownRandallstownCatonsvilleTimoniumCockeysvilleBaltimore City
White — Hero, Services, Area, Reviews. The default surface everywhere.
Sky Blue — Trust strip, Geothermal. Signals information and expertise without weight.
Soft Yellow — Klein Difference, CTA strip. Warm and attention-drawing without shouting.
Off-white — Reviews section. Gentle separation without a color statement.
Near-black — Footer only. One dark anchor at the base of the page.
Logo Color Roles in this Direction
Red — CTAs, active nav, star ratings, section eyebrows, and the dominant service rule. Never a background.
Yellow — Tinted into the soft yellow panel backgrounds. Never full-saturation. The four-color footer rule is the only full-saturation yellow.
Cobalt — Links, secondary buttons, trust strip icons and text. Carries informational weight without being aggressive.
Green — Geothermal service only. Contained. The footer rule is the one place all four appear together.
What Changed from Direction B
Removed all black section backgrounds except the footer. Hero is now white, not dark.
Sky blue replaces the heavy red trust strip. Same information, much lower visual temperature.
Yellow used at ~15% saturation as a panel tint rather than as a full background color.
Red is now functional only — buttons and highlights. It reads as intentional rather than decorative.
Questions to Resolve Before Choosing
Does the sky blue feel right for a heating company, or does it read too cold / too "dental office"? It could shift warmer toward a pale gold instead.
The yellow panels need real photography to test against. On a white-heavy site, the photo quality carries much more of the brand weight than on a dark site.
The footer is the only truly dark section. Is that enough anchor? Or does one interior section — e.g. the Klein Difference — want to be dark for contrast and gravitas?