Owner & CEO
Will Hamby
Owner & CEO
Will owns and operates KnightStone and brings 20+ years of commercial, industrial, and residential experience.
Licensed & Insured
Rheem & Daikin certified
Pricing Before Work
Options explained for approval
Owner Operated
Led by Will Hamby
After-Hours Emergency Service
After 5 PM weekdays & weekends
Request service in under a minute
Membership Plans
Two residential maintenance plans
These plans are for residential homeowners. Non-members pay an $89 diagnostic; plan pricing and included services are listed below.
Checkmate Comfort Plan
Residential HVAC Membership
$14/moor $100/yr
- ✓ 2 HVAC tune-ups per year (spring & fall)
- ✓ Priority scheduling
- ✓ $39 diagnostic fee
- ✓ 10% repair discount
- ✓ Transferable when you sell
Best Value
King's Shield
Residential Total Home Protection
$20/moor $200/yr
- ✓ 2 HVAC tune-ups + plumbing inspection
- ✓ Electrical safety inspection
- ✓ Priority scheduling
- ✓ FREE diagnostic & 20% off repairs
- ✓ Member-only promotions · transferable
Not a residential member? A service call starts with an $89 diagnostic fee. Pricing is per system; additional systems may be extra. Commercial work is assessed and quoted per job—call or request an estimate so the team can price the actual property and equipment.
Meet the Team
The people behind every visit
KnightStone is owner-operated and serves Cookeville and the Upper Cumberland with a focused local team for HVAC, plumbing, electrical, light-commercial, and membership service requests.
HVAC Manager
Jamie
HVAC Manager & Lead Technician
Jamie leads KnightStone’s HVAC service work with 10+ years of HVAC service experience.
Our Services
HVAC, plumbing & electrical — everything that keeps your home running
Submit one request for HVAC, plumbing, electrical, light-commercial, water-heater, or seasonal-maintenance needs.
Swipe to explore all 6 services
HVAC
Seasonal tune-ups, repairs, and installs. Rheem & Daikin certified for heating and cooling systems.
Explore HVAC →Plumbing
Leaks, clogged drains, and water heaters. The team diagnoses the issue and explains repair options before work begins.
Explore plumbing →Electrical
Panels, breakers, outlets, upgrades, and safety inspections for residential electrical systems.
Explore electrical →Light Commercial
HVAC, plumbing, and electrical service requests for offices, storefronts, rentals, and small facilities.
Explore commercial →Water Heaters
Diagnosis, repair, replacement, and sizing guidance for residential water-heating systems.
Seasonal Maintenance
Spring and fall tune-ups that include inspection of system components.
Commercial Pricing
Priced for the property—not squeezed into a residential plan
Commercial work is assessed and quoted per job. KnightStone reviews the actual property, equipment, access, materials, permits, and timing, then explains the price before approved work begins.
The simple ruleResidential Checkmate and King’s Shield membership prices do not apply to commercial properties.
Service assessment
The team confirms the commercial assessment or dispatch charge before the visit, then identifies the system, access needs, and cause of the problem.
Preventive maintenance
Maintenance is priced by equipment type, number of units, visit frequency, access, filter or belt needs, and the agreed inspection checklist.
Repairs & projects
After assessment, KnightStone provides a written quote for the defined work. Materials, permits, rentals, or special equipment are identified when required.
After-hours response
Urgent nights, weekends, and holidays may carry a separate dispatch and overtime rate. The applicable charge is explained before the truck moves.
- HVAC · plumbing · electrical
- Equipment count & type
- Roof, lift & access
- Materials & permits
- Distance & timing
For a useful first quote, share the property type, service address, trade, equipment count or photos, and whether the work is standard-hours or urgent.
Request a commercial quote →How It Works
How does a service request work?
01
Request
Call or send an online request. Tell the team what's going on; a KnightStone person confirms available appointment options.
02
Diagnose
Your technician assesses the issue, then explains available work and pricing before work begins.
03
Approve
You choose whether to approve the explained work and pricing.
Service Areas
Serving Cookeville & the Upper Cumberland
From downtown to the suburbs and beyond, KnightStone handles HVAC, plumbing, and electrical service requests. Send a request above or call; the team confirms availability before scheduling.
Hours & Rates
When we come out
Standard Hours
Monday–Friday, 8 AM–5 PM
Regular service calls at standard rates. Send an online request or call; the team confirms availability.
Evening Appointments · Standard Rates
Can't be home before 5?
Request a 5 or 6 PM visit in advance. The team confirms availability; confirmed evening appointments use standard rates rather than emergency-dispatch rates.
After-Hours Emergencies · Nights & Weekends
Nights & weekends
Call KnightStone for unscheduled requests after 5 PM and on weekends. Emergency dispatch carries an after-hours rate quoted before dispatch. (615) 486-4617
15% Veteran Discount. Veterans receive 15% off; mention it with the request or to the technician.
Good to Know
Frequently asked questions
What does a membership include?
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Depending on the plan, membership includes:
- Seasonal HVAC tune-ups, spring and fall
- Priority scheduling, subject to availability
- A reduced diagnostic fee and repair discounts
What if I'm not a member — what does a diagnostic cost?
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Non-members pay an $89 diagnostic fee for us to assess the problem. Checkmate Comfort members pay a reduced $39 diagnostic, and King's Shield members pay nothing at all. If a repair follows, that fee goes toward getting it done. Call (615) 486-4617 and we'll get you on the schedule.
Do evenings and weekends cost extra?
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Only when it's an unscheduled emergency. Here's how it works:
- Monday–Friday, 8 AM–5 PM — standard service calls, standard rates
- Confirmed evening appointments at 5 or 6 PM — standard rates
- Unscheduled calls after 5 PM weekdays and anytime on weekends — emergency dispatch with after-hours rates quoted before dispatch
Do you offer a veteran discount?
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Yes — veterans get 15% off. Mention veteran status with the request or when the technician arrives.
What areas around Cookeville do you serve?
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The configured service area covers Putnam, White, Overton, DeKalb, and Cumberland counties. Listed cities are Cookeville, Algood, Sparta, Livingston, Smithville, and Crossville. If you're nearby but outside that list, call (615) 486-4617 so a person can check the address.
Is the membership transferable?
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Yes — both plans are fully transferable:
- Sell your home and the remaining coverage can move with it
- A real selling point for buyers who value a maintained system
- Peace of mind that carries over, not money left on the table
What's the difference between Checkmate and King's Shield?
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Checkmate Comfort is HVAC-focused; King's Shield covers your whole home. Here's the short version:
- Checkmate ($14/mo or $100/yr) — 2 HVAC tune-ups, priority scheduling, $39 diagnostic, 10% off repairs
- King's Shield ($20/mo or $200/yr) — everything above plus a plumbing and an electrical safety inspection, FREE diagnostic, 20% off repairs, member-only promotions
Do you serve commercial properties?
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Yes — light commercial is one of our trades. Commercial work is assessed and quoted per job rather than placed on a residential membership plan. We handle offices, storefronts, rentals, and small facilities across HVAC, plumbing, and electrical. Request an estimate or call so the team can review the actual property and equipment.
Why join instead of just calling when something breaks?
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Membership provides planned maintenance and priority scheduling subject to availability. Regular inspections are intended to identify maintenance needs earlier, but no inspection can guarantee that a future failure will be prevented. Reach Will any time at (615) 486-4617.
Which trades do you cover?
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HVAC, plumbing, and electrical — plus light commercial. We're Rheem and Daikin certified for heating and cooling, handle leaks, drains, and water heaters on the plumbing side, and cover panels, breakers, outlets, and safety inspections on the electrical side. One company keeps your whole home running.
How do I pay, and what's the diagnostic fee?
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Work options and pricing are explained before approval. Payment options are confirmed with the appointment. The diagnostic fee is $89 for non-members, $39 for Checkmate members, and free for King's Shield members.
What if I need to reschedule?
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Please give KnightStone at least 24 hours' notice whenever possible. Call (615) 486-4617 and Will's team will help move your visit to another available time.