Review sentiment: 55/100
Overview
Johnstone Supply lists furnace replacement with gas and oil options. Combustion analyzers and CO detectors are shown in equipment listings. Financing available is noted on the store pages. Store inventory includes OEM furnace parts and venting materials. Waterloo winters raise the need for correct venting and combustion commissioning.
Wholesale HVAC supplier stocking furnaces and parts for Waterloo-area contractors. Commercial furnace replacement appears in their listed specializations. Combustion analyzers and CO detectors are advertised on equipment pages. Financing Available is stated on the site.
Pros & cons
Pros
Services offered (self-reported)
Cons
- Smaller review history (11 Google reviews)
- Mixed customer sentiment (score 55/100)
When to choose them
- You need to finance the work
- You have a commercial property
Services
Service area
Contact & hours
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🌐
✉️
📍
🕒
Call for hours
Frequently asked questions
What are the pros of Johnstone Supply?
Based on public records and customer reviews: Financing available.
What are the cons of Johnstone Supply?
Concerns flagged from public records and reviews: Smaller review history (11 Google reviews); Mixed customer sentiment (score 55/100).
When should I choose Johnstone Supply?
Choose them if: You need to finance the work; You have a commercial property.
What is the Vouched Score for Johnstone Supply?
46/100. Top contributing signals: Google Rating 73/100+ Review Sentiment 55/100, Llm Score 40/100. The score blends public-record signals (BBB, license records), customer review signals (Google, Yelp), and editorial assessment.
How can I contact Johnstone Supply?
Call Johnstone Supply at +1-319-233-0525. Address: 2661 Geraldine Rd, Waterloo, IA 50703, USA.
What does furnace replacement service typically cost when working with a Waterloo, IA provider like Johnstone Supply?
Full gas furnace replacement typically runs $2,750–$6,000, and high-efficiency condensing furnace runs $4,150–$8,800 in Waterloo, Iowa. These are area-wide market estimates, not Johnstone Supply's quotes. For an exact price, request a written estimate from Johnstone Supply.
Does Johnstone Supply do Furnace Replacement in Waterloo, IA?
Yes. Johnstone Supply lists Furnace Replacement among its services and serves Waterloo, IA and Replacement Waterloo, IA. Call +1-319-233-0525 for a quote.
Does Johnstone Supply do Commercial HVAC in Waterloo, IA?
Yes. Johnstone Supply lists Commercial HVAC among its services and serves Waterloo, IA and Replacement Waterloo, IA. Call +1-319-233-0525 for a quote.
Compare with nearby providers
| Provider | Vouched | Years | |
|---|---|---|---|
Johnstone Supply (this company) |
— | 4.2★ (10+) | — |
Mike Fereday Heating & Air Conditioning ⭐ Best for Same-Day Replacement |
65/100 | 4.5★ (50+) | 21+ |
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Profile last updated July 27, 2026.