Minnesota Licensed & Bonded
License #MB715020 · Mechanical contractor in good standing with the State of Minnesota.
About Design Heating
Owner-Operated. Engineering-First. Built for Duluth.
Design Heating is the one-person HVAC company you actually want for your home — every project designed, installed, and stood behind by Kevin Kaski, a Certified Geothermal Designer working out of Duluth, Minnesota since 2016.
Meet the Owner
Kevin Kaski — Owner & Certified Geothermal Designer
Kevin started Design Heating in 2016 with one principle: a heating system should be engineered for the home it sits in — never sized by rule of thumb, never installed by whichever crew happens to be free that week.
Every Design Heating project starts with a computerized ACCA Manual J heat-loss calculation. For hydronic systems, Kevin designs tubing layouts in LoopCad and models near-boiler piping before the first parts are ordered. For geothermal, he sizes the ground loop himself using the same software the big engineering firms use.
Then he installs it — personally. No subcontractors. No "lead tech" you've never met. When you call Design Heating, the person who picks up the phone is the person who will design your system, the person who will install your system, and the person who will service it five years from now.
That is why Design Heating maintains a 4.9-star average across 114 verified reviews.
Credentials & Trust
Receipts, Not Just Promises
The certifications behind every Design Heating project.
Certified Geothermal Designer (CGD)
IGSHPA credential — fewer than a dozen CGD designers serve Northeastern Minnesota.
IGSHPA Accredited Trainer
Kevin is certified to train other geothermal professionals — the highest IGSHPA tier.
IGSHPA Accredited Installer
Verified ground-loop and heat-pump installation training, current to industry standards.
ACCA Manual J + Manual D
Every system sized by computerized heat-loss calculation. No rule-of-thumb sizing, ever.
4.9 ★ across 114 reviews
Verified reviews on Google, BBB, and Birdeye. BBB Accredited Business since founding.
Our Story
From One-Person Shop to Northern Minnesota’s Geothermal Specialist
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2016
Design Heating, LLC is founded
Kevin Kaski incorporates Design Heating, LLC in Duluth, MN with one principle: every system gets a Manual J calculation before installation. The first jobs are residential boiler upgrades around the Duluth-Superior area.
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2018
Focus shifts to high-efficiency hydronics
After dozens of successful fuel-oil-to-gas conversions, Design Heating becomes known regionally for high-efficiency condensing boiler installations and custom hydronic system design in LoopCad.
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2020
IGSHPA Accredited Installer credential
Kevin completes IGSHPA accreditation as a Geothermal Installer — formally certifying years of field experience with ground-source heat pump systems.
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2022
Certified Geothermal Designer (CGD)
Kevin earns the CGD credential — the most advanced certification IGSHPA offers — making Design Heating one of the few firms in Northeastern Minnesota capable of designing complete geothermal systems in-house.
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2024
IGSHPA Accredited Trainer
Kevin is approved as an IGSHPA Accredited Trainer, qualified to teach geothermal installation and design to other professionals.
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Today
Hundreds of systems installed
4.9-star average across 114 verified Google, BBB, and Birdeye reviews. Still owner-operated. Still no subcontractors. Still every job sized by Manual J.
How We Work
The Same Engineering Workflow on Every Project
1
Calculate
Computerized ACCA Manual J heat-loss analysis of your home — room by room, BTU by BTU.
2
Design
Custom system design including hydronic piping, LoopCad tubing layouts, manifold sizing, and electrical schematics.
3
Install
Kevin personally installs every project with quality components. No subcontractors, no rotating crews.
4
Commission
Every component tested and tuned. Combustion analyzed, refrigerant verified, outdoor reset curves set. Documented for warranty.
What Our Clients Say
4.9 Stars Across 114 Reviews
“We shopped around and felt fortunate when we hired Kevin. Kevin installed a gas boiler, as an addition, to our Geo Thermal heating system. Our experience was totally positive from start to finish. We highly recommend Design Heating, LLC.”
Verified review via Google
“Great to work with. Very professional and knowledgeable on Geothermal. Was able to diagnose and repair unit quickly and do an annual one over on the machine.”
Verified review via Birdeye
“Great service! From first phone call (handled very professionally) to project complete and follow through they did an outstanding job. I highly recommend these folks!”
Verified review via Birdeye
Service Area
Based in Duluth. Serving the Northland.
Design Heating works with homeowners across Northeastern Minnesota and Northwestern Wisconsin — typically within a 30-mile radius of our shop on Washburn Road in Duluth.
Design Heating, LLC5131 Washburn Road
Duluth, MN 55803
(218) 525-5914
kevin@designheating.net
- Duluth, MN
- Hermantown, MN
- Proctor, MN
- Pike Lake, MN
- Cloquet, MN
- Esko, MN
- Carlton, MN
- Two Harbors, MN
- Superior, WI
Frequently Asked Questions
About Design Heating & Kevin Kaski
Design Heating is owned and operated by Kevin Kaski, a Duluth-based HVAC designer and installer. Kevin founded the company in 2016 and personally handles every project — from the initial Manual J heat-loss calculation through final system commissioning. There are no rotating crews and no subcontractors on Design Heating jobs.
Design Heating, LLC is licensed and bonded in Minnesota under license #MB715020. Owner Kevin Kaski holds the Certified Geothermal Designer (CGD) credential from IGSHPA (International Ground Source Heat Pump Association) and is an IGSHPA Accredited Trainer and Accredited Installer — the highest credentials available in the geothermal industry. He is one of very few CGD-certified designers serving Northeastern Minnesota.
Kevin founded Design Heating in 2016 after years of working in the trade. Since then the company has designed and installed hundreds of hydronic, geothermal, and forced-air systems across the Duluth, MN region. Design Heating maintains a 4.9-star average rating across 114 verified Google, BBB, and Birdeye reviews.
Three things. First, the owner installs every job — you work with Kevin from the first phone call through warranty service. Second, every system is engineered, not guessed: we run an ACCA Manual J heat-loss calculation and design hydronic systems in LoopCad before quoting. Third, we specialize. We focus on high-efficiency boilers, infloor radiant, panel radiators, geothermal, and modern forced-air — rather than trying to be everything to everyone.
We serve homeowners and small commercial clients across Duluth, Hermantown, Proctor, Pike Lake, Cloquet, Esko, Carlton, Two Harbors (Minnesota), and Superior, Wisconsin — generally within a 30-mile radius of our shop at 5131 Washburn Road in Duluth, MN.
We do not currently offer emergency or 24/7 service. Regular business hours are Monday through Friday, 7:00 AM to 5:30 PM. For urgent heating issues during the cold months, we do our best to prioritize same-week appointments.
Want Kevin on Your Next Project?
Free in-home consultation, Manual J heat-loss calculation, and a written, itemized quote — every time.