4.05 GPM Residential Propane Gas Tankless Water Heater
4.8Best price now
Compared across 2 stores. Prices are checked against each store and labelled with when.
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Quick answers
- Where is the 4.05 GPM Residential Propane Gas Tankless Water Heater cheapest?
- At ThermoMate, for $359.99, as of our latest check.
- What do buyers say about the 4.05 GPM Residential Propane Gas Tankless Water Heater?
- Rated 4.8 out of 5 from 77 ratings. Buyers like: Instant hot water with no running out, even with multiple showers at once; Easy, straightforward installation with clear instructions; Stable temperature with no sudden hot or cold bursts. Common complaints: One reviewer had not received the venting they ordered; Slow FedEx freight in the Midwest.
- Where can I buy the 4.05 GPM Residential Propane Gas Tankless Water Heater?
- 3 stores we checked sell it, including ThermoMate, HAI, thehomeappliances.
4.05 GPM Residential Propane Gas Tankless Water Heater prices at every store
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- ThermoMateNew
In stockReturn policy
$359.99Observed Nov 1, 2026, 4:17 AM - HAINew
In stock
$389.99Observed Nov 1, 2026, 4:17 AM
Also available at
- thehomeappliancesCheck price at thehomeappliances
4.05 GPM Residential Propane Gas Tankless Water Heater price history
Lowest price we've seen: $389.99 on Nov 1 at HAI. Tracked across 1 store since Nov 1.
From ThermoMate
- 98,500 BTU propane tankless water heater delivering up to 4.05 GPM of instant hot water
- Serves 2-3 fixtures simultaneously with no warm-up time
- Multiple safety protections: boil-dry, overheat, water leak, anti-freeze, flame failure and high water pressure
- Oxygen-free copper heat exchanger for superior heat transfer and corrosion resistance
- Built-in chip adjusts heating power 20,000 times per second, holding temperature within ±1°F
- Compact 21" high x 13" wide x 7" deep design saves over 200% of space versus tank heaters
- Materials
- High-quality oxygen-free copper heat exchanger
- Guarantee
- Comprehensive Warranty System; optional 1- or 2-year extended protection available after the standard manufacturer warranty ends.
- Returns
- 30-Day Return (New & Unused); buyer's remorse returns are refunded 80% of the total, defective returns get a full refund.
- Shipping
- Free shipping to U.S. Mainland addresses only; Alaska, Hawaii, Virgin Islands, Puerto Rico, Guam and Canada are not free and freight is paid by the customer.
- In the box
- ThermoMate 98,500 BTU Propane Tankless Water Heater, Installation Kits, User Manual
About the 4.05 GPM Residential Propane Gas Tankless Water Heater
Endless Hot Water On Demand
Never worry about running out of hot water again! The ThermoMate 98,500 BTU Propane Tankless Water Heater delivers up to 4.05 gallons per minute (GPM) of instant hot water, making it perfect for serving 2-3 fixtures simultaneously. Whether it’s for showers, dishwashing, or laundry, enjoy unlimited hot water whenever you need it—no warm-up time required.
Advanced Safety Features for Peace of Mind
Your safety is our top priority. This propane tankless water heater is equipped with multiple safety protections, including boil-dry protection, overheat protection, water leak protection, anti-freeze protection, flame failure protection, and high water pressure protection. Rest easy knowing your home and family are protected.
Energy-Efficient & Cost-Saving
Built with a high-quality oxygen-free copper heat exchanger, the ThermoMate tankless water heater offers superior heat transfer and corrosion resistance compared to stainless steel models. This ensures long-lasting performance while helping you save on energy costs, making it an eco-friendly and budget-friendly choice.
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