Commercial HVAC Dadeville Restaurants: Lake Martin Guide

By Chad Wiswall, Owner & Lead HVAC Technician, Alabama HVAC License #92244

Commercial HVAC for Dadeville and Lake Martin restaurants is a different animal from residential or even standard commercial. Restaurant HVAC has to handle weekend dining surges that triple occupancy in two hours, kitchen exhaust loads that pull thousands of CFM out of the building, and Alabama Department of Public Health compliance for ventilation and air changes. Chad's AC Direct has installed and serviced commercial HVAC for restaurants from Dadeville to Eclectic to Alexander City. Below is a practitioner's guide for restaurant owners and operators around Lake Martin. See our full Alabama HVAC Guide for related commercial guides.

Lake Martin Restaurant Peak-Season HVAC Load

Lake Martin restaurants have a brutal occupancy curve compared to typical Alabama dining. A 100-seat restaurant in Dadeville or Eclectic that runs 30 to 50 percent capacity Monday through Thursday will hit 100+ percent (with waiting list) Friday night, all day Saturday, and Sunday brunch. Memorial Day through Labor Day, those peaks intensify with lake traffic.

HVAC sized to average occupancy will fail on peak days. HVAC sized to peak occupancy short-cycles (turns on and off rapidly) during slower weekdays, which destroys equipment life and runs up the electric bill. The right answer is variable-capacity equipment that modulates to actual load.

Kitchen Exhaust Calculations

Restaurant kitchen exhaust hoods pull massive volumes of air to capture grease, steam, and heat from cooking surfaces. Standard sizing:

Light cooking (sandwich shop): 200 to 300 CFM per linear foot of hood
Medium cooking (grill, fryers): 300 to 400 CFM per linear foot
Heavy cooking (charbroiler, mesquite grill): 400 to 500+ CFM per linear foot

A typical Lake Martin grill-style restaurant with a 10-foot hood pulls 3,500 to 5,000 CFM continuously when cooking. Every cubic foot exhausted has to be replaced through makeup air, or the building goes into negative pressure and pulls air back through doors, windows, and the HVAC return.

Makeup Air Requirements

Alabama Mechanical Code (which follows the International Mechanical Code) requires that 80 percent or more of exhausted kitchen air be replaced by tempered makeup air. Tempered means heated in winter and (in some setups) cooled in summer to keep kitchen comfort reasonable.

For Lake Martin restaurants, we typically install:

Direct-fired makeup air unit (gas heater on incoming air) sized to 80 to 90 percent of exhaust CFM
Dedicated outdoor air system (DOAS) with energy recovery for premium installs
Backdraft dampers to prevent reverse flow when exhaust is off

Skipping or undersizing makeup air is the single most common Lake Martin restaurant HVAC mistake we encounter. Symptoms: dining room feels stuffy, doors are hard to open, kitchen is unbearably hot, gas appliance pilot lights blow out.

RTU Sizing for 2,000 to 4,000 Square Foot Restaurants

Most independent Lake Martin restaurants fall in this size range. Rooftop unit (RTU) sizing for dining area HVAC depends on:

Peak occupancy (people generate 250 to 400 BTU per hour each)
Lighting load (LED is much lower than incandescent)
Kitchen heat infiltration through the pass-through window
Solar heat gain through dining room windows (lake view glazing is significant)
Outdoor air ventilation requirements (per occupant)

Rough cooling load for typical Lake Martin restaurants:

2,000 sq ft, 60 seats: 8 to 12 tons of cooling (2 to 3 RTUs typically)
3,000 sq ft, 100 seats: 12 to 18 tons of cooling
4,000 sq ft, 150 seats: 18 to 25 tons of cooling

We always do Manual N (commercial load calculation) rather than rules of thumb. Lake Martin restaurants with heavy west-facing window walls (sunset lake views) often need more cooling than the square footage alone suggests.

Alabama Department of Public Health Restaurant HVAC Compliance

Alabama restaurants are regulated by the Alabama Department of Public Health under the Food Establishment Sanitation Rules. HVAC-relevant requirements:

Mechanical ventilation in food prep areas at minimum rates set by the IMC
Hood ventilation over cooking surfaces meeting NFPA 96
Restroom exhaust meeting the IMC minimums (typically 75 CFM per fixture)
No condensate dripping over food prep areas
Insect screens on outdoor air intakes
Annual hood inspection and cleaning records

Tallapoosa County and Coosa County health inspectors will check ventilation rates and hood compliance on routine inspections. Failed compliance can shut down service until corrected.

Restaurant HVAC Financing

Restaurant HVAC installs run $30,000 to $150,000+ for a full system replacement. We offer financing through Wells Fargo Commercial and similar lenders. Most independent restaurant owners qualify for 7 to 10 year terms at fixed rates. Replacing a failing system before it fully dies is almost always cheaper than emergency replacement during peak season.

Commercial HVAC Dadeville and Lake Martin Restaurants FAQ

How often should restaurant HVAC be serviced?

Quarterly at minimum. Lake Martin's humidity and the cooking grease load means filters, coils, and exhaust components need attention more often than typical office HVAC. We offer commercial maintenance agreements with quarterly visits.

What is the lifespan of restaurant HVAC equipment?

RTUs in restaurant duty typically last 12 to 15 years (versus 20 to 25 in office duty). The cooking environment, peak loads, and grease infiltration shorten equipment life significantly.

Can we install commercial HVAC during the off-season to minimize disruption?

Yes, and we recommend it. Late October through early March is the ideal install window for Lake Martin restaurants. We can typically complete a full RTU swap in 2 to 4 days with the restaurant closed.

How much does new commercial HVAC cost for a typical Lake Martin restaurant?

For a 2,500 to 3,500 square foot restaurant with one or two RTUs plus a makeup air unit, plan on $40,000 to $80,000 for a complete replacement. Higher for buildings needing extensive ductwork modifications.

Do you do emergency commercial service for restaurants?

Yes, 24/7. Restaurant HVAC failure during service is a revenue emergency. Call 334-478-1438 (Dadeville office) for fastest response in the Lake Martin area.

Ready to Get Started in Dadeville and Lake Martin?

Chad's AC Direct has served Central Alabama since 1993. We're BBB A+ rated, carry Alabama HVAC License #92244, and back every install with our "Buy Direct, Pay Less" pricing on Goodman, Trane, Bryant, Mitsubishi, and Daikin systems. Financing available through Wells Fargo, Goodleap, Microf, and Alabama Power.

Call us 24/7 for emergency service: 334-478-1438

Or request a free in-home estimate online and we'll be out within one business day.

Commercial HVAC for Dadeville and Lake Martin Restaurants: A Practitioner's Guide