How many fixtures can it run at once?

About one or two. At 2.9 GPM it handles a shower or a sink well, but running a shower and laundry together will cut flow and temperature.

Does it work with a standard gas line?

It runs on natural gas at 68,000 BTU, so the supply line and regulator must be sized for that input. A licensed installer should confirm before purchase.

Can it be installed outdoors?

No. It is rated for indoor residential use only, and it needs proper venting to the outside.

Does it need a tank or a recirculation loop?

No tank is needed. It heats water as it flows, so there is no warm-up wait, though hot water still takes a few seconds to reach a distant tap.

The heater, a user manual and installation kits. Gas line, venting and water connections are typically sourced separately by the installer.

Is it good for a cold climate?

It has anti-freeze protection, but it is an indoor unit. In unheated spaces, owners should confirm the protection suits their temperatures.

What do buyers say about the ThermoMate Tankless Water Heater Endless Hot Water?

Rated 4.5 out of 5 from 46 ratings.

ThermoMate Tankless Water Heater Endless Hot Water

Best price now

$259.99at ThermoMateChecked 20 h ago

Prices are checked against each store and labelled with when.

Visit ThermoMate

ThermoMate Tankless Water Heater Endless Hot Water

Best price now

$259.99at ThermoMateChecked 20 h ago

Prices are checked against each store and labelled with when.

Visit ThermoMate

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Price facts

Last seen at $259.99 at ThermoMate on Nov 9.

Our take on the ThermoMate Tankless Water Heater Endless Hot Water

The ThermoMate CZ264NG is a natural gas tankless water heater rated at 68,000 BTU and about 2.9 GPM, sized to run one or two fixtures at once. It heats on demand with no tank and no warm-up, using an oxygen-free copper heat exchanger and holding outlet temperature within about 1°F. That makes it a fit for a small home, apartment or a single bathroom plus kitchen, where a tank unit wastes space and standby energy. Against larger rivals it gives up flow rate, so it is not the pick for multi-bath households running showers and laundry together. Owners rate it well overall, and the common complaints are install complexity and flow dropping when several taps open.

Best forSmall homes and apartments with one or two fixturesReplacing a tank heater where floor space is tightHouseholds on natural gas wanting on-demand hot waterSingle-bathroom setups with a kitchen nearby

Pros

Heats on demand with no tank and no standby loss
Copper heat exchanger resists corrosion
Holds outlet temperature within about 1°F
Anti-freeze protection for cold indoor spaces
Compact wall-mounted footprint at about 28 by 16 inches

Cons

2.9 GPM limits it to one or two fixtures at a time
Natural gas only, and indoor installation only
Venting and gas line work usually need a licensed installer
Temperature can dip when a second fixture opens

ThermoMate Tankless Water Heater Endless Hot Water prices at every store

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In stock
$259.99Checked 20 h ago
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ThermoMate Tankless Water Heater Endless Hot Water price history

Lowest price we've seen: $259.99 on Nov 10 at ThermoMate. Tracked across 1 store since Nov 10.

What reviewers say

4.5 / 546 ratings

Owners rate the CZ264NG highly, praising steady hot water and the space it frees up compared with a tank. Complaints center on installation effort and flow dropping when more than one fixture runs.

What people mention

Temperature stabilityPraisedOwners say outlet temperature stays steady within about a degree during a shower.
InstallationCriticisedBuyers report the gas line, venting and mounting work are best left to a licensed plumber.
Flow rateMixed2.9 GPM is fine for one fixture but drops when a second tap opens.
Space savingPraisedThe compact wall unit frees up the floor space a tank heater took.
NoisePraisedOwners describe it as quiet in normal use.

Specifications

Fuel Type: Natural Gas
Energy Efficiency: Energy-Efficient
Product Type: Tankless Water Heater
System Type: Tankless Water Heater
Type Features: Instant hot water, Instant heating, Temperature control
Heating Method: Tankless
Heat Up Time: No warm-up time required

Questions and answers

How many fixtures can it run at once?: About one or two. At 2.9 GPM it handles a shower or a sink well, but running a shower and laundry together will cut flow and temperature.
Does it work with a standard gas line?: It runs on natural gas at 68,000 BTU, so the supply line and regulator must be sized for that input. A licensed installer should confirm before purchase.
Can it be installed outdoors?: No. It is rated for indoor residential use only, and it needs proper venting to the outside.
Does it need a tank or a recirculation loop?: No tank is needed. It heats water as it flows, so there is no warm-up wait, though hot water still takes a few seconds to reach a distant tap.
What is in the box?: The heater, a user manual and installation kits. Gas line, venting and water connections are typically sourced separately by the installer.
Is it good for a cold climate?: It has anti-freeze protection, but it is an indoor unit. In unheated spaces, owners should confirm the protection suits their temperatures.
Where is the ThermoMate Tankless Water Heater Endless Hot Water cheapest?: At ThermoMate, for $259.99, as of our latest check.
What do buyers say about the ThermoMate Tankless Water Heater Endless Hot Water?: Rated 4.5 out of 5 from 46 ratings.