
Commercial Trades FAQ
Questions DFW commercial tenants ask
Plain answers about commercial HVAC, electrical, and plumbing — and the triple-net-lease realities that decide who pays for what.
What is the $5,000 rule for HVAC?
A federal-tax-credit threshold, not a service rule. The IRS commercial HVAC tax-credit cap is $5,000 for qualifying high-efficiency equipment. For tenants on a triple-net lease, this matters when you are considering replacement and want the credit benefit on your federal taxes. We can quote replacement work that meets the spec — the credit claim itself is between you and your accountant.What is the difference between HVAC and commercial HVAC?
Commercial HVAC is built for buildings, not houses. The equipment is larger (rooftop units instead of split systems for most light-commercial spaces), the load calculations are different (occupancy, ventilation, kitchen exhaust), and code is stricter (Texas commercial inspection rules, fire dampers, return-air handling). A residential HVAC tech will struggle on a rooftop unit — that is not their world.What is the average cost of a commercial HVAC system?
It depends on building, equipment, and scope. We quote per job after seeing the rooftop, the panel, and the existing equipment age. We do not quote sight-unseen and we do not publish flat pricing — the variance between a coil cleaning and a full rooftop unit replacement is too wide. Call (214) 676-0357 or send a form and we will get back with a written quote.What do commercial HVAC companies charge per hour?
We do not bill per hour. Commercial HVAC work is quoted per scope — meaning you approve a fixed price for a defined job before we start. Per-hour billing creates an incentive to drag out repair work; that is the opposite of how Big Dog operates. If the scope changes mid-job, we ask for written approval before we proceed.What are the signs of a failing HVAC?
Watch for: longer run times between cycles, warm air at the vents when the unit is calling for cool, uneven temperature across the space, water pooling near the air handler, electrical-smell odors, breakers tripping when the compressor kicks on, and rising power bills with no occupancy change. Two or three of these together usually means the rooftop unit needs eyes on it before it fully quits.How much should a commercial electrician charge per hour?
Same answer as HVAC — we do not bill per hour, we quote per scope. A defined fixed-price job protects the tenant from billing surprises and protects the crew from being rushed. Our quotes itemize labor, parts, and any permitting separately, so the tenant has documentation for landlord pass-throughs or CAM reconciliation under a triple-net lease.What is the difference between an electrician and a commercial electrician?
Licensing scope and equipment knowledge. Texas requires a separate license track for commercial work. A commercial electrician knows three-phase service, larger panels (200A and up), exit-lighting code, conduit runs in occupied space, and DFW permit and inspection rules. Big Dog's master-electrician partner is licensed by TDLR for commercial work — every job is permitted and inspected.Who do I call when my warehouse HVAC goes out?
Call Big Dog Tenant Services at (214) 676-0357. We dispatch same-day across Farmers Branch, Addison, and Lewisville. We work on rooftop units, split systems, and the aging equipment typical of older DFW commercial warehouse and retail buildings. One call covers HVAC, electrical, or plumbing — you do not have to chase three vendors when something else breaks.Can I get same-day commercial electrical service in Addison or Farmers Branch?
Yes. Same-day dispatch is the model — if you call during business hours (Mon–Fri 8 AM – 5 PM) for an Addison or Farmers Branch commercial location, we work to get a crew on site that day. Outlet failures, breaker trips, panel issues, lighting outages — these are dispatch-today calls.What should I ask a commercial electrician before hiring them?
Five questions: (1) What is your TDLR license number? (2) Is the job permitted and inspected? (3) Is the quote per scope or per hour? (4) What is the warranty on the work? (5) Will the invoice be itemized for triple-net pass-through? An electrician who answers all five plainly is one worth hiring; one who hedges on any of them is a flag.
Still have a question? Call (214) 676-0357.
Call us or fill out the form. We answer the phone.