Complete Comfort, OneTrusted Team
From a quick tune-up to a whole new system, DeHaven's Cornerstone keeps your home comfortable in every season — with straight answers and workmanship that lasts.
Air Conditioning
When the Indiana humidity hits, you need cooling that just works. We repair, tune, and install AC systems of every make and model — and we'll tell you honestly whether a fix or a replacement makes more sense.
- AC repair & diagnostics
- New AC & heat-pump installs
- Ductless mini-splits
- Seasonal AC tune-ups
Air Conditioning
Heating & Furnace
Heating & Furnace
No heat on a January night is more than uncomfortable — it's urgent. We answer, we show up, and we get your family warm again. Gas, electric, oil, heat pumps, and boilers.
- Furnace repair & replacement
- Gas, electric & oil furnaces
- Heat pumps & boilers
- No-heat priority calls
Indoor Air Quality
The air inside your home can be dirtier than the air outside. We help you fix that — with purification, humidity control, cleaner ducts, and smarter thermostats.
- Whole-home air purification
- Humidifiers & dehumidifiers
- Duct cleaning & sealing
- Smart thermostats
Indoor Air Quality
Cornerstone Care Plans
Cornerstone Care Plans
A little maintenance prevents most breakdowns. Our bi-annual care plan keeps your system running at peak efficiency, catches small problems early, and puts you first when you need us.
- Bi-annual maintenance visits
- Highest efficiency & safe operation
- Priority scheduling
- Discounts on repairs
- Longer equipment life
How It Works
Call or Book
Reach us by phone, text, or the form — a friendly assistant always answers, and we respond fast.
Upfront Quote
We diagnose the issue and give you a clear, flat price — no surprises.
Expert Fix
We do the work right the first time, clean up, and test everything.
Let us be the cornerstone of your comfort.
Call now for fast, friendly service — or request your free estimate online.