This guide helps buyers find the best through-the-wall heating and cooling units for apartments, offices, and larger rooms. It outlines top options, who each model is best for, and practical buying tips. The table below highlights five solid choices with different capacities and features to suit common scenarios.
| Product | BTU (Cool / Heat) | Best For | Key Benefit |
|---|---|---|---|
| Whirlpool 14,000 BTU Through-the-Wall AC | 14,000 / 13,600 BTU cooling; 10,600 / 8,600 BTU supplemental heat | Large living spaces up to 700 sq ft | Strong cooling with supplemental heat and 8-way louvers |
| OLMO 12,000 BTU Through-the-Wall AC & Heater | 12,000 / 11,700 BTU cooling; 10,600 / 8,600 BTU heating | Residential, commercial, or hotel spaces | Built-in wireless smart kit; eco-friendly refrigerant |
| LG 11,800 BTU Through-the-Wall AC & Heater | 11,800 BTU cooling; heater option included | Bedrooms or offices up to ~530 sq ft | Remote, 4-way deflection, multiple speeds |
| Durastar DRTHC122XNA1 12,000 BTU | 12,000 BTU cooling; 10,600 BTU heating | Versatile spaces around 450–550 sq ft | Removable sleeve compatibility; remote control |
| OLMO 8,000 BTU Through-the-Wall AC & Heater | 8,000 BTU cooling; 4,200 BTU heating | Smaller rooms or apartments | Wall sleeve included; compact footprint |
Whirlpool Through-the-Wall 14,000 BTU AC
Features include 14,000 BTU cooling with 13,600 BTU peak, plus 10,600 BTU supplemental heating. It is designed for spaces up to 700 square feet and includes an attached 4.9-foot plug for 230V/20A outlets, along with 8-way directional louvers and 3 fan speeds, plus 4 operation modes. Best for: larger living rooms or open-plan spaces where reliable cooling and occasional supplemental heat are needed. Caution: supplemental heat is not intended as a primary heat source in extreme cold.
OLMO 12,000 BTU Through-the-Wall AC & Heater
Features 12,000 BTU cooling and 10,600 BTU heating with a built-in wireless smart kit and remote. Uses R-32 eco-friendly refrigerant. Best for: spaces that require a combined cooling and heating solution with smart controls. Caution: wall sleeve is not included and must be purchased separately, which affects installation planning.
LG 11,800 BTU Through-the-Wall AC & Heater
Provides 11,800 BTU cooling with heater capability, ideal for bedrooms or small living areas up to about 530 sq ft. Features 3 cooling/heating/fan speeds, 4-way air deflection, remote control, and a digital control panel. Best for: those who want flexible climate control with a remote and easy maintenance. Caution: not designed for standard window venting; intended for through-the-wall installation.
Durastar DRTHC122XNA1 12,000 BTU
Offers 12,000 BTU cooling and 10,600 BTU heating with a remote control, suitable for spaces around 450–550 sq ft. Compatible with Durastar sleeve units sold separately. Best for: spaces needing a balanced cooling/heating solution with remote ease. Caution: sleeve not included; verify compatibility with existing sleeve before purchase.
OLMO 8,000 BTU Through-the-Wall AC & Heater
Compact 8,000 BTU cooling with 4,200 BTU heating, designed for smaller rooms or apartments. The model includes a wall sleeve and built-in wireless smart kit for remote operation. Best for: smaller bedrooms or offices where through-the-wall installation is preferred. Caution: heating capacity is modest; may be insufficient in very cold climates without a supplemental heat source.
Buying Guide: Key Considerations For Through-The-Wall Units
What size room must the unit handle? BTU requirements depend on room size, ceiling height, sun exposure, and occupant load. A higher BTU unit cools larger spaces faster, but may use more energy if not needed. For through-the-wall models, ensure the sleeve and mounting space match the unit’s dimensions.
- BTU and heating capacity: Match a unit’s cooling and heating outputs to the room. If you mostly need cooling, prioritize higher BTU cooling. For mixed climates, a model with solid heating capacity is advantageous.
- Electrical requirements: Many units run on 230V/20A outlets; verify your outlet type and circuit capacity before buying. A dedicated circuit is often recommended.
- Sleeve and installation: Some packages include sleeves; others require purchase separately. Sleeve compatibility is crucial for proper sealing and efficiency.
- Energy efficiency and refrigerant: Look for energy-efficient models with modern refrigerants (e.g., R-32) to reduce running costs and environmental impact.
- Controls and maintenance: Remote controls, digital thermostats, and washable filters simplify operation and maintenance.
- Noise levels: Through-the-wall units can vary in noise. If the space is a bedroom or study, consider models with lower noise ratings or quieter fans.
FAQ
- What is the main advantage of a through-the-wall unit? It saves window space, provides stable temperature control, and is easy to install in compatible sleeves.
- Can these units heat as well as cool? Many models offer supplemental heating, but supplemental heat is usually not a primary heat source in very cold climates.
- Do I need a sleeve with these units? Some units include a sleeve; others require a separate sleeve purchase. Verify sleeve compatibility before ordering.
- What room size is ideal for a 12,000 BTU unit? Around 450–550 square feet with typical ceiling heights and standard insulation.
- Is 230V power required for most through-the-wall units? Yes, many high-capacity models use 230V/20A outlets; check your electrical system and local code.
- Can I install these myself? Installation can be straightforward for experienced DIYers, but often requires professional electrical work and proper sleeve mounting for safety and efficiency.
