For your house.
Ranch houses in Northgate and Rossmoor, older homes near downtown, and hillside houses toward Shell Ridge. Air conditioning, heat pumps, furnaces and whole-house fans — repaired, tuned up and replaced.
Home services
Heating & cooling · Diablo Valley
Hot afternoons, cool nights. Use both.
ShadowPeak repairs, maintains and replaces heating and air conditioning for Walnut Creek homes and businesses — and installs whole-house fans, so the cool Diablo Valley evening does some of the work your AC would.
A typical hot summer day, midnight at the top.
Who we work for
Homes and businesses in the valley.
For your building.
Offices, shops, restaurants and medical suites across Walnut Creek, Concord and Pleasant Hill. Rooftop and split systems serviced and replaced, and schedules set so you're not cooling an empty building overnight.
Business services
Why the evenings matter
The valley cools down after dark. Let it in.
On many summer days in the Diablo Valley, the evening air drops well below the afternoon high. A whole-house fan pulls that cooler air through open windows and pushes the day's heat out through the attic — for a fraction of the power an air conditioner uses.
It doesn't replace AC on the hottest afternoons. It shortens the hours AC has to run.
- Sized to the house and the attic venting
- Insulated, sealed dampers for winter
- Never run on smoke days — we show you why
- Works alongside the AC you already have
Where we work
Walnut Creek and the Diablo Valley.
Based on Ygnacio Valley Road. We cover central Contra Costa County.
- Walnut Creek
- Concord
- Lafayette
- Pleasant Hill
- Clayton
- Danville
- Alamo
- Martinez
Questions
Fans, AC and the rest.
Is a whole-house fan the same as an attic fan?
No. An attic fan only vents the attic. A whole-house fan pulls air from the living space through open windows and pushes it out through the attic, cooling the house itself when the outside air is cooler.
Can a whole-house fan replace my air conditioner?
Usually not on the hottest afternoons. It works when the outside air is cooler than inside, typically evenings and nights, and shortens the hours the air conditioner has to run.
Can I run it on smoke days?
No. A whole-house fan pulls outdoor air straight into the house. On smoke days keep it off, keep windows shut and let the filtered system do the work.
Do you work on businesses as well as homes?
Yes. Offices, shops, restaurants and medical suites: rooftop and split systems, schedules and maintenance plans.
Does ShadowPeak do coatings or painting?
No. Coats is part of the business name, not the trade. ShadowPeak does heating, ventilation and air conditioning only.
Which areas do you cover?
Walnut Creek, Concord, Lafayette, Pleasant Hill, Clayton, Danville, Alamo and Martinez.
Homes or businesses
Get a quote.
AC, heat pump, furnace or whole-house fan — we'll tell you what fits.