Johnstone Supply
Johnson City, TN HVAC · #4 of 3
At a glance
- Google rating
- 4.6★ from 10 reviews
- Services
- 5 HVAC services
- Service area
- Johnson City, TN
Overview
Johnstone Supply stocks mini-split systems and ductless accessories for installers. Product listings mention modern refrigerants like R-32 and R-454B. Inventory includes IAQ products such as filters, UV, and dehumidification. Johnson City's older housing stock often needs accessible replacement parts and retrofit components. The site lists a contractor training calendar for installers and technicians.
Johnstone Supply is an HVAC parts retailer and installer resource in Johnson City, TN. Product listings mention modern refrigerants like R-32 and R-454B on equipment pages. Specializations list mini-split systems and air quality products for residential and light commercial work.
Vouched Score breakdown — 54/100
Johnson City, TN HVAC average is 79/100. Ranks #4 of 3 listed HVAC providers in Johnson City, TN.
Composite of public-record signals (BBB, license records), customer review signals (Google, Yelp), and editorial assessment of provider profile. See full methodology →
How Johnstone Supply compares to the Johnson City average
| Signal | Johnstone Supply | Johnson City avg | Delta |
|---|---|---|---|
| Vouched Score | 54/100 | 79/100 | -25 vs avg |
| Google rating | 4.6★ | 4.9★ | -0.3 vs avg |
| Review volume | 10 | 555+ | -549 vs avg |
What customers say
Pros & cons
Self-reported on their website — not independently verified.
- Satisfaction guarantee
- Smaller review history (10 Google reviews)
When to choose them — and when to consider alternatives
- You prefer a provider with hundreds of customer reviews
- You want a BBB-rated firm specifically
Services
- HVAC Installation — Full HVAC system installation including indoor and outdoor equipment, ductwork tie-in, and refrigerant work.
- Mini-Split Systems — Mini-split installation and service — typically ductless, used for additions or zoned comfort.
- Indoor Air Quality — Indoor air-quality work: high-MERV filtration, UV systems, humidifiers/dehumidifiers, and duct sanitization.
- Thermostat Installation
- AC Replacement — Removal and replacement of an aging or failed central A/C — typically condenser, evaporator coil, and refrigerant lines.
Service area
Johnson City, TN home
Contact & hours
Frequently asked questions
What are the pros of Johnstone Supply?
What are the cons of Johnstone Supply?
When should I consider alternatives to Johnstone Supply?
What is the Vouched Score for Johnstone Supply?
What does HVAC service typically cost when working with a Johnson City, TN provider like Johnstone Supply?
Does Johnstone Supply do HVAC Installation in Johnson City, TN?
Does Johnstone Supply do Mini-Split Systems in Johnson City, TN?
Does Johnstone Supply do Indoor Air Quality in Johnson City, TN?
Does Johnstone Supply do Thermostat Installation in Johnson City, TN?
Does Johnstone Supply do AC Replacement in Johnson City, TN?
Compare with nearby providers
| Provider | Vouched | Years | BBB | Yelp | Our picks | |
|---|---|---|---|---|---|---|
Johnstone Supply (this company) |
54/100 | 4.6★ (10) | — | — | — | — |
| 82/100 | 4.9★ (350+) | 23+ | — | — | Best for New System Installation | |
| 74/100 | 5.0★ (90+) | 12+ | — | — | Best for Heat Pumps | |
| 80/100 | 4.8★ (1,230+) | 57+ | — | 3.3★ | — |
Listed in
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Profile last updated July 6, 2026.